179 results on '"GUDJONSSON, SIGURDUR"'
Search Results
2. Practice Variation in the Management of Adult Hydroceles: A Multinational Survey
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Forss, Mikko, Bolsunovskyi, Kostiantyn, Lee, Yung, Kilpeläinen, Tuomas P., Aoki, Yoshitaka, Gudjonsson, Sigurdur, Hervé, François, Järvinen, Petrus, Malde, Sachin, Miyazawa, Katsuhito, Sairanen, Jukka, Sander, Lotte, Violette, Philippe D., Witte, Lambertus P.W., Guyatt, Gordon H., and Tikkinen, Kari A.O.
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- 2023
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3. ETHICS AS USUAL? GENDER DIFFERENCES IN WORK ETHIC AND GRADES/S ETIKOM KAO I OBICNO? SPOLNE RAZLIKE U RADNOJ ETICI I OCJENAMA
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Haroardottir, Arna Kristin, Gudjonsson, Sigurdur, Minelgaite, Inga, and Kristinsson, Kari
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Ethics -- Usage ,Business schools -- Usage ,Women ,Business, international - Abstract
This research focuses on female work ethics in Iceland, one of the most gender equal countries in the world. The Multidimensional Work Ethic Profile (MWEP) was used for measuring the work ethic of 238 students of both genders. Based on a convenience sample obtained from the School of Business, University of Iceland we tested two hypotheses. The first concerned whether women have a higher work ethic than men; the second whether female students have higher grades than their male counterparts. We found women to have both a higher work ethic and grades than men. Overall outcomes based on the MWEP revealed statistically significant differences between the averages of women and men, with the mean for women higher by 7.07 points. In addition, women's average university grades were found to be statistically higher than those of men by a margin of 0.36 points. These results provide interesting insights into the potential contribution of women and men to the workplace, suggesting that women, on average, will be more productive and deliver superior performance. Furthermore, work-based research and evaluations are necessary to test this inference, including the research across different sectors of the Icelandic economy. Ovaj se rad bavi radnom etikom zena na Islandu, jednoj od drzava s najvisom razinom spolne ravnopravnosti na svijetu. U radu se koristi multidimenzionalni profil radne etike za mjerenje radne etike 238 studenata obaju spolova. Na temelju prigodnog uzorka studenata poslovne skole Sveucilista u Islandu, testirane su dvije hipoteze. Prva se odnosila na veci stupanj radne etike, a druga na vecu razinu ocjena zena u odnosu na muskarce. Obje su hipoteze potvrdene, s obzirom da je, koristenjem multidimenzionalnog profila radne etike, dobivena statisticki znacajna razlika izmedu prosjeka zena i muskaraca, pri cemu je prosjek zena bio veci za 7.07 bodova. Nadalje, prosjecne ocjene studija zena su bile statisticki znacajno vece od ocjena muskaraca za iznos 0.36 jedinica ocjene. Dobiveni rezultati nude zanimljiv uvid u potencijalni radni doprinos zena i muskaraca, pri cemu se pokazuje da bi zene, u prosjeku, mogle biti produktivnije. Nadalje je potrebno istrazivanje utemeljeno na praksi, kako bi se testirala postavljena tvrdnja, ukljucujuci i istrazivanja kroz razlicite sektore islandskog gospodarstva. Kljucne rijeci: poslovna etika, spolne razlike, multidimenzionalni profil radne etike, Island., 1. INTRODUCTION There is widespread acknowledgement that good ethics can positively impact organisation's economic performance, with literature suggesting that ethics, values, integrity and responsibility are prerequisites in today's workplace, assuming [...]
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- 2019
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4. THE MICROFINANCE INDUSTRY
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Gudjonsson Sigurdur
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micofinance, outreach, sustainability ,Business ,HF5001-6182 ,Finance ,HG1-9999 - Abstract
In this paper the microfinance industry will be described, both as it is today and with historical perspectives. Brief history of past failure of subsidized loans is mentioned. Different but important contributions from Stiglitz and Yunnus are explained and then the microfinance industry´s growth and current state will be described. Finally, different microfinance institutions types are explained. The microfinance industry is peculiar and deserves to be researched and focused upon for several reasons. The most important is that it aims towards poverty reduction by reaching out to the poor and provide them with capital. Noteworthy, that is to be done in a sustainable way, which allows the industry to thrive and expand. Indeed it has expanded greatly over the last few years. While the microfinance industry expands the importance of understanding the industry becomes ever more important. Researches on corporate governance for microfinance institutions have been carried out but more researches are needed, in particular for the social goal called outreach. Because the microfinance institutions have both social goals and financial goals, the microfinance industry is different from most other industries where profit maximization is the main and often the only goal. The corporate governance findings for microfinance industry may therefore be different and may not be easily transferred to other industries.
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- 2017
5. Transurethral Bladder Tumor Resection Can Cause Seeding of Cancer Cells into the Bloodstream
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Engilbertsson, Helgi, Aaltonen, Kristina E., Björnsson, Steinarr, Kristmundsson, Thorarinn, Patschan, Oliver, Rydén, Lisa, and Gudjonsson, Sigurdur
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- 2015
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6. Infiltration of CD3+ and CD68+ cells in bladder cancer is subtype specific and affects the outcome of patients with muscle-invasive tumors
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Sjödahl, Gottfrid, Lövgren, Kristina, Lauss, Martin, Chebil, Gunilla, Patschan, Oliver, Gudjonsson, Sigurdur, Månsson, Wiking, Fernö, Mårten, Leandersson, Karin, Lindgren, David, Liedberg, Fredrik, and Höglund, Mattias
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- 2014
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7. Tough Times Require Tough People: The Benefits of Grit for Reducing Employee Burnout.
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Kristinsson, Kari, Gudjonsson, Sigurdur, and Kristjansdottir, Bryndis
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- 2023
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8. Toward a Molecular Pathologic Classification of Urothelial Carcinoma
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Sjödahl, Gottfrid, Lövgren, Kristina, Lauss, Martin, Patschan, Oliver, Gudjonsson, Sigurdur, Chebil, Gunilla, Aine, Mattias, Eriksson, Pontus, Månsson, Wiking, Lindgren, David, Fernö, Mårten, Liedberg, Fredrik, and Höglund, Mattias
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- 2013
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9. Long‐term third‐party assessment of results after continent cutaneous diversion with Lundiana pouch
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Liedberg, Fredrik, Gudjonsson, Sigurdur, Xu, Abai, Bendahl, Pär‐Ola, Davidsson, Thomas, and Månsson, Wiking
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- 2017
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10. Marine feeding areas and vertical movements of Atlantic salmon (Salmo salar) as inferred from recoveries of data storage tags
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Gudjonsson, Sigurdur, Einarsson, Sigurdur Mar, Jonsson, Ingi Runar, and Gudbrandsson, Johannes
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Atlantic salmon -- Food and nutrition ,Animal feeding behavior -- Identification and classification ,Earth sciences - Abstract
We released 598 Atlantic salmon (Salmo salar) hatchery smolts in a river in Iceland in 2005 and 2006 tagged with data storage tags recording temperature and (depth) continuously. Five salmon returned in 2006 and two in 2007, all spending 1 year at sea. The complete temperature and depth profiles of the whole ocean migration were measured. The salmon stayed close to the surface most of the time and showed diurnal behavior, staying at slightly deeper waters during day. The salmon were in temperatures from 6 to 15[degrees]C, with warmer temperatures in the summer. We compared the fish-recorded temperature with sea surface temperature from an available National Oceanic and Atmospheric Administration database to locate the fish at different times. Utilizing the diurnal behavior of the salmon, we estimated solar noon each day during winter. Sea surface temperatures and diurnal activity were used to estimate daily locations using established Hidden Markov Model for fish geolocation. The salmon in the study stayed southwest of Iceland in the Irminger Sea during the first summer months, but in the fall they moved towards the Faroes Islands and then back to the Irminger Sea where they stayed, until returning to the river. The salmon also took shorter and deeper dives (>100 m) during the latter part of their ocean migration. Nous avons relache 598 saumon atlantique (Salmo salar) saumoneaux d'ecloserie dotes d'etiquettes enregistrant la temperature et (la profondeur) en continu dans une riviere d'Islande, en 2005 et 2006. Cinq saumons sont revenus en 2006 et deux en 2007, apres avoir passe une annee en mer. Les profils de temperature et de profondeur complets pour toute leur migration oceanique ont ete mesures. Les saumons sont demeures pres de la surface la plupart du temps et presentaient un comportement diurne, demeurant dans des eaux un peu plus profondes durant le jour. Ils evoluaient a des temperatures allant de 6[degrees]C a 15[degrees]C, les valeurs les plus elevees ayant ete mesurees pendant l'ete. Nous avons compare la temperature des poissons a la temperature de la surface de la mer tiree d'une base de donnees de la National Oceanic and Atmospheric Administration afin de situer les poissons au fil du temps. En utilisant le comportement diurne des saumons, nous avons estime le midi solaire pour chaque jour de l'hiver. La temperature de la surface de la mer et l'activite diurne ont ete utilisees pour estimer leur position quotidienne a l'aide d'un modele de Markov cache etabli pour la geolocalisation de poissons. Les saumons de l'etude sont demeures au sud-ouest de l'Islande, dans la mer d'Irminger, durant les premiers mois d'ete, mais se sont deplaces vers les iles Feroe a l'automne, pour ensuite revenir vers la mer d'Irminger, ou ils sont demeures jusqu'il leur retour dans la riviere. Les saumons plongeaient en outre moins longuement, mais plus profondement (>100 m) vers la fin de leur migration en mer. [Traduit par la Redaction], Introduction Since the mid-1980s, declines in abundance of Atlantic salmon (Salmo salar) have been observed both in North American and European stocks (Parrish et al. 1998; Chaput 2012; Mills et [...]
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- 2015
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11. Hire-Me-Not? The Influence of Grades and University Type on Labor Market Success.
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Kristinsson, Kari, Gudjonsson, Sigurdur, Minelgaite, Inga, and Christiansen, Tinna Dahl
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LABOR market ,SCHOOL choice ,FIELD research ,PRIVATE schools ,PUBLIC schools - Abstract
Copyright of Pedagogy Studies / Pedagogika is the property of Vytautas Magnus University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2023
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12. Financial Literacy and Gender Differences: Women Choose People While Men Choose Things?
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Gudjonsson, Sigurdur, Minelgaite, Inga, Kristinsson, Kari, and Pálsdóttir, Sigrún
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FINANCIAL literacy ,CONVENIENCE sampling (Statistics) ,GENDER inequality ,PERSONALITY ,QUANTITATIVE research - Abstract
According to gender personality traits, women are more interested in people, whereas men are more interested in things. The goal of this research is to see if there is a gender gap in financial literacy and if these disparities can be explained by different areas of interest. A convenience sample of nearly a thousand responses was received in quantitative research. The findings clearly show that women have lower financial literacy than men, but there is no indication that this is due to men and women's differing interests in people and things. [ABSTRACT FROM AUTHOR]
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- 2022
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13. The Value of the UroVysion® Assay for Surveillance of Non–Muscle-Invasive Bladder Cancer
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Gudjónsson, Sigurdur, Isfoss, Björn L., Hansson, Kerstin, Domanski, Anna-Maria, Warenholt, Janina, Soller, Wolfgang, Lundberg, Lena-Maria, Liedberg, Fredrik, Grabe, Magnus, and Månsson, Wiking
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- 2008
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14. Tissue microarray based analysis of prognostic markers in invasive bladder cancer: Much effort to no avail?
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Liedberg, Fredrik, Anderson, Harald, Chebil, Gunilla, Gudjonsson, Sigurdur, Höglund, Mattias, Lindgren, David, Lundberg, Lena-Maria, Lövgren, Kristina, Fernö, Mårten, and Månsson, Wiking
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- 2008
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15. Extended lymph node dissection in patients with urothelial cell carcinoma of the bladder: can it make a difference?
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Holmer, Magnus, Bendahl, Pär-Ola, Davidsson, Thomas, Gudjonsson, Sigurdur, Månsson, Wiking, and Liedberg, Fredrik
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- 2009
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16. LEARNING, BUT NOT DOING: ABSENCE OF FEMALE STOCKBROKERS IN STOCK TRADE.
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Gudjonsson, Sigurdur, Minelgaite, Inga, and Bergsteinsdottir, Jona Hrefna
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STOCKBROKERS , *SEMI-structured interviews , *FEMALES - Abstract
Women are now participating in all components of the financial sector, particularly in the gender equal nation of Iceland. More than one-third of those who have education as stockbrokers are females, however, they rarely work as active stockbrokers. In this research, an attempt is made to answer why this is the case. We ask stockbrokers themselves what they think could be the explanation of this discrepancy between education and work participation. This qualitative phenomenal research, where six semi-structured interviews were carried out with Icelandic people with stockbrokers’ education and license, reveals three noteworthy themes. First, the work environment stockbrokers face is not family friendly, with dining and drinking frequent in the evenings. Additionally, clients are usually married males in their late forties or fifties, which does not suit young married female stockbrokers. There are far too few women in the stockbroking field and, finally, the stockbroker’s job is stressful, requiring 24/7 attention that females find unattractive in a profession. [ABSTRACT FROM AUTHOR]
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- 2022
17. Migration of Atlantic Salmon, Salmo salar, Smolt through the Estuary Area of River Ellidaar in Iceland
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Gudjonsson, Sigurdur, Jonsson, Ingi Runar, and Antonsson, Thorolfur
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- 2005
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18. Response rates in email vs. mail surveys for urologists: a randomized controlled trial
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Aoki, Yoshitaka, Gudjonsson, Sigurdur, Hervé, François, Järvinen, Petrus, Malde, Sachin, Miyazawa, Katsuhito, Sander, Lotte, Violette, Philippe D., Witte, Lambertus P.W., Forss, Mikko, Guyatt, Gordon H., Bolsunovskyi, Kostiantyn, Kilpeläinen, Tuomas P., Lee, Yung, Sairanen, Jukka, and Tikkinen, Kari A.O.
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- 2023
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19. IRF4 Transcription-Factor-Dependent CD103+CD11b+ Dendritic Cells Drive Mucosal T Helper 17 Cell Differentiation
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Persson, Emma K., Uronen-Hansson, Heli, Semmrich, Monika, Rivollier, Aymeric, Hägerbrand, Karin, Marsal, Jan, Gudjonsson, Sigurdur, Håkansson, Ulf, Reizis, Boris, Kotarsky, Knut, and Agace, William W.
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- 2013
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20. Robot-assisted laparoscopic retroperitoneal lymph node dissection in clinical stage II testicular cancer
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Annerstedt, Magnus, Gudjonsson, Sigurdur, Wullt, Björn, and Uvelius, Bengt
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- 2008
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21. MiRNA expression in urothelial carcinomas: Important roles of miR-10a, miR-222, miR-125b, miR-7 and miR-452 for tumor stage and metastasis, and frequent homozygous losses of miR-31
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Veerla, Srinivas, Lindgren, David, Kvist, Anders, Frigyesi, Attila, Staaf, Johan, Persson, Helena, Liedberg, Fredrik, Chebil, Gunilla, Gudjonsson, Sigurdur, Borg, Åke, Månsson, Wiking, Rovira, Carlos, and Höglund, Mattias
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- 2009
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22. Transition from open to robotically assisted approach on radical prostatectomies in Iceland. A nationwide, population-based study.
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Gudmundsdottir, Hilda Hrönn, Johnsen, Arni, Fridriksson, Jon Örn, Hilmarsson, Rafn, Gudmundsson, Eirikur Orri, Gudjonsson, Sigurdur, and Jonsson, Eirikur
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RADICAL prostatectomy ,SURGICAL margin ,PROSTATECTOMY ,SURGICAL blood loss ,OPERATIVE surgery - Abstract
In January 2015, radical prostatectomies (RPs) in Iceland changed almost entirely from being performed as open (ORP) to robotically assisted (RARP). This study assesses early surgical and short-term oncological outcome after ORP and RARP and evaluates the safety of transition between the two surgical techniques. The study population involved 160/163 (98%) of all radical prostatectomies performed in Iceland between January 2013 and April 2016. Data on patients was collected retrospectively from medical records. Early surgical and short-term oncological outcomes were compared between the two surgical techniques. The ORP and RARP cohorts were comparable with respect to all clinical and pathological variables, except for median prostate volume, which was 45 mL in the ORP cohort and 37 mL in the RARP cohort (p = 0.03). Intraoperative blood loss was higher, hospital stay longer, catheterization time longer, and risk of complications within 30 days of surgery higher after ORP than RARP (p < 0.01). The operative time, positive surgical margin rate and recurrence free survival, within two years, was comparable between the two surgical techniques. The transition from ORP to RARP in Iceland was safe and resulted in improved early surgical outcome. However, no conclusion can be drawn from this study regarding oncological outcome, due to short follow up and a small sample size. [ABSTRACT FROM AUTHOR]
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- 2022
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23. Knowing More Than Own Mother, Yet not Enough: Secondary School Students' Experience of Financial Literacy Education.
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Gudjonsson, Sigurdur, Jonsdottir, Sigurbjorg Maren, and Minelgaite, Inga
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FINANCIAL literacy ,SECONDARY school students ,LITERACY education ,SCHOOL children ,LEARNING ,FINANCIAL security - Abstract
Copyright of Pedagogy Studies / Pedagogika is the property of Vytautas Magnus University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2022
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24. EARLY INTRAVESICAL EPIRUBICIN INSTILLATION AFTER TRANSURETHRAL RESECTION FOR NON-MUSCLE INVASIVE BLADDER CANCER IS INEFFICIENT FOR RECURRENT TUMOURS: 1703
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Gudjonsson, Sigurdur, Liedberg, Fredrik, Adell, Lars, Merdasa, Fekadu, Olsson, Ronnie, Larsson, Bruno, Richthoff, Johan, Hagberg, Gunnar, Grabe, Magnus, Bendahl, PÃr-Ola, and Mansson, Wiking
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- 2008
25. Intraoperative Sentinel Node Detection Improves Nodal Staging in Invasive Bladder Cancer
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Liedberg, Fredrik, Chebil, Gunilla, Davidsson, Thomas, Gudjonsson, Sigurdur, and Månsson, Wiking
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- 2006
26. Which data are available in central registries on bladder cancer patients in the five Nordic countries.
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Körner, Stefanie Korsgaard, Dreyer, Thomas, Haug, Erik Skaaheim, Jerlström, Tomas, Boström, Peter J., Gudjonsson, Sigurdur, and Jensen, Jørgen Bjerggaard
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BLADDER cancer ,CANCER patients ,CANCER invasiveness ,DIAGNOSIS ,COUNTRIES - Abstract
The aim of this study was to give a collective overview on all available data sources on bladder cancer patients in the Nordic countries including the amount of detail and coverage. National representatives from five Nordic countries were asked to fill out a questionnaire on available information regarding bladder cancer patients from databases in their respective countries. Additional information was retrieved from descriptions of the relevant registries. Non-muscle invasive bladder cancer: from all countries, information on stage and grade at transurethral resection of the bladder (TURB) could be retrieved. Details on procedures (TURB, instillation therapy, photodynamic diagnosis, and perioperative instillation) were varying within different databases. Muscle invasive bladder cancer: in all Nordic countries, detailed information on cystectomy patients could be retrieved but with variable registration of complications. Completeness of available information on oncological treatment (radiation, chemotherapy, and immunotherapy) were varying. Oncological outcome: Information on overall survival was available in all countries whereas recurrence-free survival and cancer-specific survival were available for some but not all patients depending on treatment modality. Despite limitations, we found that it was possible to retrieve detailed information on diagnostics, treatment, and outcome for most aspects of bladder cancer in the Nordic countries on a population based, non-selected patient cohort. [ABSTRACT FROM AUTHOR]
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- 2021
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27. Recurrent and multiple bladder tumors show conserved expression profiles
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Knuutila Sakari, Borg Åke, Chebil Gunilla, Andersson Anna, Liedberg Fredrik, Aits Sonja, Jee Kowan, Gudjonsson Sigurdur, Lindgren David, Fioretos Thoas, Månsson Wiking, and Höglund Mattias
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Urothelial carcinomas originate from the epithelial cells of the inner lining of the bladder and may appear as single or as multiple synchronous tumors. Patients with urothelial carcinomas frequently show recurrences after treatment making follow-up necessary. The leading hypothesis explaining the origin of meta- and synchronous tumors assumes a monoclonal origin. However, the genetic relationship among consecutive tumors has been shown to be complex in as much as the genetic evolution does not adhere to the chronological appearance of the metachronous tumors. Consequently, genetically less evolved tumors may appear chronologically later than genetically related but more evolved tumors. Methods Forty-nine meta- or synchronous urothelial tumors from 22 patients were analyzed using expression profiling, conventional CGH, LOH, and mutation analyses. Results We show by CGH that partial chromosomal losses in the initial tumors may not be present in the recurring tumors, by LOH that different haplotypes may be lost and that detected regions of LOH may be smaller in recurring tumors, and that mutations present in the initial tumor may not be present in the recurring ones. In contrast we show that despite apparent genomic differences, the recurrent and multiple bladder tumors from the same patients display remarkably similar expression profiles. Conclusion Our findings show that even though the vast majority of the analyzed meta- and synchronous tumors from the same patients are not likely to have originated directly from the preceding tumor they still show remarkably similar expressions profiles. The presented data suggests that an expression profile is established early in tumor development and that this profile is stable and maintained in recurring tumors.
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- 2008
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28. Tiling resolution array CGH and high density expression profiling of urothelial carcinomas delineate genomic amplicons and candidate target genes specific for advanced tumors
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Heidenblad Markus, Lindgren David, Jonson Tord, Liedberg Fredrik, Veerla Srinivas, Chebil Gunilla, Gudjonsson Sigurdur, Borg Åke, Månsson Wiking, and Höglund Mattias
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Internal medicine ,RC31-1245 ,Genetics ,QH426-470 - Abstract
Abstract Background Urothelial carcinoma (UC) is characterized by nonrandom chromosomal aberrations, varying from one or a few changes in early-stage and low-grade tumors, to highly rearranged karyotypes in muscle-invasive lesions. Recent array-CGH analyses have shed further light on the genomic changes underlying the neoplastic development of UC, and have facilitated the molecular delineation amplified and deleted regions to the level of specific candidate genes. In the present investigation we combine detailed genomic information with expression information to identify putative target genes for genomic amplifications. Methods We analyzed 38 urothelial carcinomas by whole-genome tiling resolution array-CGH and high density expression profiling to identify putative target genes in common genomic amplifications. When necessary expression profiling was complemented with Q-PCR of individual genes. Results Three genomic segments were frequently and exclusively amplified in high grade tumors; 1q23, 6p22 and 8q22, respectively. Detailed mapping of the 1q23 segment showed a heterogeneous amplification pattern and no obvious commonly amplified region. The 6p22 amplicon was defined by a 1.8 Mb core region present in all amplifications, flanked both distally and proximally by segments amplified to a lesser extent. By combining genomic profiles with expression profiles we could show that amplification of E2F3, CDKAL1, SOX4, and MBOAT1 as well as NUP153, AOF1, FAM8A1 and DEK in 6p22 was associated with increased gene expression. Amplification of the 8q22 segment was primarily associated with YWHAZ (14-3-3-zeta) and POLR2K over expression. The possible importance of the YWHA genes in the development of urothelial carcinomas was supported by another recurrent amplicon paralogous to 8q22, in 2p25, where increased copy numbers lead to enhanced expression of YWHAQ (14-3-3-theta). Homozygous deletions were identified at 10 different genomic locations, most frequently affecting CDKN2A/CDKN2B in 9p21 (32%). Notably, the latter occurred mutually exclusive with 6p22 amplifications. Conclusion The presented data indicates 6p22 as a composite amplicon with more than one possible target gene. The data also suggests that amplification of 6p22 and homozygous deletions of 9p21 may have complementary roles. Furthermore, the analysis of paralogous regions that showed genomic amplification indicated altered expression of YWHA (14-3-3) genes as important events in the development of UC.
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- 2008
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29. Clinical markers of morbidity, mortality and survival in bladder cancer patients treated with radical cystectomy. A systematic review.
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Boström, Peter J., Jensen, Jørgen Bjerggaard, Jerlström, Tomas, Arum, Carl-Jørgen, Gudjonsson, Sigurdur, Ettala, Otto, and Syvänen, Kari T.
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BIOMARKERS ,BLADDER cancer ,CANCER patients ,META-analysis ,CYSTECTOMY ,BLADDER exstrophy - Abstract
Context: Radical cystectomy and pelvic lymph node dissection (RC and PLND) are an essential part of the treatment paradigm in high risk bladder cancer. However, these patients have high rates of morbidity and mortality related both to the treatment and to the disease. Objective: To provide overview of current literature about clinical markers that can be used to predict and improve BC-patient outcomes at the time of RC and PLND and to study if they are properly validated. Evidence acquisition: A systematic literature search was conducted according to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) criteria between January 1990 and October 2018 to identify English written original and review articles relevant to this topic. Prospective and retrospective studies were included. Evidence synthesis: There are several risk factors identified from non-randomised trials that can be improved before surgery to reduce perioperative mortality and morbidity. These include poor nutritional status, anaemia, renal function and smoking. Preoperative nomograms have also been developed to help decision-making and to inform patients about the risks of surgery. They can be used to estimate risk of postoperative mortality after RC and PLND with accuracy varying from 70 to 86%. These nomograms are largely based on retrospective data. Likewise, nomograms developed to calculate estimates about patient's overall and cancer specific survival have the same limitations. Conclusion: Clinical markers to predict morbidity, mortality and survival in patients with bladder cancer treated with RC and PLND may help to improve patient outcomes and treatment decision-making, but available data come from small retrospective trials and have not been properly validated. Prospective, multi-centre studies are needed to implement and disseminate predictive clinical markers and nomograms such that they can be utilised in treatment decision-making in daily practice. [ABSTRACT FROM AUTHOR]
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- 2020
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30. Deficit in Propriety? Cooperative Learning and Group Self-evaluation in Higher Education.
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Nedzinskaitė-Mačiūnienė, Rasa, Minelgaite, Inga, and Gudjonsson, Sigurdur
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SELF-evaluation ,GROUP work in education ,HIGHER education ,LEARNING strategies ,TEACHER evaluation ,COLLABORATIVE learning - Abstract
Copyright of Pedagogy Studies / Pedagogika is the property of Vytautas Magnus University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
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31. FEMALE ADVANTAGE? MANAGEMENT AND FINANCIAL PERFORMANCE IN MICROFINANCE.
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GUDJONSSON, Sigurdur, KRISTINSSON, Kari, GYLFASON, Haukur Freyr, and MINELGAITE, Inga
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MICROFINANCE ,WOMEN in finance ,ORGANIZATIONAL performance ,SUSTAINABILITY ,RETURN on assets - Abstract
The purpose of the article is to investigate whether female presence in microfinance institutions' management team, i.e. board members, managers and loan officers, will improve their financial performance. We combine financial data on MFIs that is available from the MIX Market database with original data on the gender composition of MFIs' management team, who include board members, managers and loan officers. This original dataset of 223 MFIs is analyzed using Logit-Tobit regression models with return on assets (ROA) as the dependent variable and proportion of female board members, female loan officers and female managers as the main independent variables. We find that a higher proportion of female managers and female loan officers improve financial performance in microfinance, while a higher proportion of female board members does not. Our results indicate that a major contributor to the financial sustainability of microfinance institutions is having a higher rate of women in vital decision-making roles, especially lower level management positions. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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32. Reducing recurrence in non-muscle-invasive bladder cancer by systematically implementing guideline-based recommendations: effect of a prospective intervention in primary bladder cancer patients.
- Author
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Sörenby, Anne, Baseckas, Gediminas, Bendahl, Pär-Ola, Brändstedt, Johan, Håkansson, Ulf, Nilsson, Stefan, Patschan, Oliver, Tinzl, Martina, Wokander, Mats, Liedberg, Fredrik, and Gudjonsson, Sigurdur
- Subjects
BLADDER cancer ,CYSTOSCOPY ,UROTHELIUM ,FISHER exact test ,CANCER patients ,MEDICAL records - Abstract
Objective: In non-muscle-invasive bladder cancer (NMIBC), local recurrence after transurethral resection of the bladder (TURB) is common. Outcomes vary between urological centres, partly due to the sub-optimal surgical technique and insufficient application of measures recommended in the guidelines. This study evaluated early recurrence rates after primary TURB for NMIBC before and after introducing a standardized treatment protocol. Methods: Medical records of all patients undergoing primary TURB for NMIBC in 2010 at Skåne University Hospital, Malmö, Sweden, were reviewed. A new treatment protocol for NMIBC was defined and introduced in 2013, and results documented during the first year thereafter were compared with those recorded in 2010 prior to the intervention. The primary endpoint was early recurrence at first control cystoscopy. Comparisons were made by Chi-square analysis and Fisher's exact test. Recurrence-free survival (RFS) in the two cohorts was also investigated. Results: TURB was performed on 116 and 159 patients before and after the intervention, respectively. The early recurrence rate decreased from 22% to 9.6% (p = 0.005) at the first control cystoscopy after treatment. Residual/Recurrent tumour at the first control cystoscopy after the primary TURB (i.e. at second-look resection or first control cystoscopy) decreased from 31% to 20% (p = 0.038). The proportion of specimens containing muscle in T1 tumours increased from 55% to 94% (p < 0.001). RFS was improved in the intervention group (HR = 0.65, CI = 0.43–1.0; p = 0.05). Conclusions: Introduction of a standardized protocol and reducing the number of surgeons for primary treatment of NMIBC decreased the early recurrence rate from 22% to 9.6% and lowered the recurrence incidence by 35%. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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- View/download PDF
33. 'The Emperor is Naked!': Exposing (In) efficiency of Self- Assessment and Group - Assessment in Higher Education.
- Author
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Minelgaite, Inga, Nedzinskaitė-Mačiūnienė, Rasa, Kristinsson, Kari, and Gudjonsson, Sigurdur
- Subjects
ASSESSMENT of education ,HIGHER education ,ECONOMIC man ,TEAMS in the workplace ,EMPERORS - Abstract
Copyright of Pedagogy Studies / Pedagogika is the property of Vytautas Magnus University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
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34. Abstracts.
- Author
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Gudjonsson, Sigurdur
- Subjects
- *
THERAPEUTICS , *NURSES - Published
- 2019
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35. 'Even the evil need a place to live': wild salmon, salmon farming, an zoning of the Icelandic coastline
- Author
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Gudjonsson, Sigurdur and Scarnecchia, Dennis L.
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Iceland -- Agricultural policy ,Salmon fisheries -- History ,Salmon fisheries -- Management ,Salmon fisheries -- Laws, regulations and rules ,Atlantic salmon -- Management ,Atlantic salmon -- Protection and preservation ,Fishery management -- Methods ,Fishery management -- Laws, regulations and rules ,Company business management ,Government regulation ,Business ,Business, international ,Mass communications - Published
- 2009
36. A microsatellite baseline for genetic stock identification of European Atlantic salmon (Salmo salar L.).
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Gilbey, John, Coughlan, Jamie, Wennevik, Vidar, Prodöhl, Paulo, Stevens, Jamie R., Garcia de Leaniz, Carlos, Ensing, Dennis, Cauwelier, Eef, Cherbonnel, Corrine, Consuegra, Sofia, Coulson, Mark W., Cross, Tom F., Crozier, Walter, Dillane, Eileen, Ellis, Jonathan S., García-Vázquez, Eva, Griffiths, Andrew M., Gudjonsson, Sigurdur, Hindar, Kjetil, and Karlsson, Sten
- Subjects
ATLANTIC salmon ,FISH population measurement ,FISHERY management ,FISH population estimates ,MARINE resources conservation ,MARINE animals - Abstract
Atlantic salmon (Salmo salar L.) populations from different river origins mix in the North Atlantic during the marine life stage. To facilitate marine stock identification, we developed a genetic baseline covering the European component of the species' range excluding the Baltic Sea, from the Russian River Megra in the north-east, the Icelandic Ellidaar in the west, and the Spanish Ulla in the south, spanning 3737 km North to South and 2717 km East to West. The baseline encompasses data for 14 microsatellites for 26 822 individual fish from 13 countries, 282 rivers, and 467 sampling sites. A hierarchy of regional genetic assignment units was defined using a combination of distance-based and Bayesian clustering. At the top level, three assignment units were identified comprising northern, southern, and Icelandic regions. A second assignment level was also defined, comprising eighteen and twenty-nine regional units for accurate individual assignment and mixed stock estimates respectively. The baseline provides the most comprehensive geographical coverage for an Atlantic salmon genetic data-set, and a unique resource for the conservation and management of the species in Europe. It is freely available to researchers to facilitate identification of the natal origin of European salmon. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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37. Clear Cell Adenocarcinoma of the Female Urethra: Four Case Presentations of a Clinical and Pathological Entity Requiring Radical Surgery.
- Author
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Liedberg, Fredrik, Gudjonsson, Sigurdur, Håkansson, Ulf, and Johansson, Martin E.
- Subjects
- *
ADENOCARCINOMA , *TUMORS , *URETHRA surgery , *IMMUNOHISTOCHEMISTRY , *LAPAROSCOPY - Abstract
Clear cell adenocarcinoma of the female urethra is a rare tumour of unknown origin. Here, we report 4 patients with such malignancy and argue for proper identification of the disease entity and radical surgery based on the available literature. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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- View/download PDF
38. [ F]Fluorodeoxyglucose-positron emission tomography/computed tomography response evaluation can predict histological response at surgery after induction chemotherapy for oligometastatic bladder cancer.
- Author
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Kollberg, Petter, Almquist, Helen, Bläckberg, Mats, Cwikiel, Magdalena, Gudjonsson, Sigurdur, Lyttkens, Kerstin, Patschan, Oliver, and Liedberg, Fredrik
- Subjects
LYMPH ,POSITRON emission tomography ,CANCER ,CANCER chemotherapy ,LYMPHOCELE - Abstract
Objective:Patients with limited metastatic and locally advanced bladder cancer have a poor prognosis, and no definite treatment recommendations exist. However, long-term survival is possible for selected patients if surgery is combined with multiple courses of chemotherapy (i.e. induction chemotherapy). Patients with tumours that are insensitive to chemotherapy probably have little to gain from subsequent extensive surgery. The aim of this study was to evaluate sequential FDG-PET/CT examinations as an indicator of chemotherapy response. Materials and methods:Between 2007 and 2015, 50 patients with oligometastatic invasive bladder cancer selected for induction chemotherapy underwent two FDG-PET/CT examinations: the first before the start of chemotherapy and the second after three courses of cisplatinum-based combination chemotherapy. Responders were given up to six courses of chemotherapy. FDG-PET/CT response was correlated with histological response in excised lymph-node metastases. Results:Three patients showed progression to incurable disease during chemotherapy and another two patients did not undergo surgery, for medical reasons. Lymphadenectomy was performed in the remaining 45 patients, of whom 43 had lymph-node metastasis. FDG-PET/CT prediction of the histological nodal chemotherapy response was correct in 37 (86%) of those 43. The second FDG-PET/CT examination identified four out of nine non-responders. For response, the sensitivity, specificity, and positive and negative predictive values for FDG-PET/CT accuracy were 37 out of 37 (100%), one out of six (17%), 37 out of 42 (88%) and one out of one (100%), respectively. Conclusions:Repeated FDG-PET/CT seems to predict histological response. However, with the histological response criteria used in this study, five non-responders were not identified by the second FDG-PET/CT investigation. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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39. Long-term functional outcomes after radical cystectomy with ileal bladder substitute: does the definition of continence matter?
- Author
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Liedberg, Fredrik, Ahlgren, Göran, Baseckas, Gediminas, Gudjonsson, Sigurdur, Håkansson, Ulf, Lindquist, Sara, Löfgren, Annica, Patschan, Oliver, Siller, Carina, and Sjödahl, Gottfrid
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CYSTECTOMY ,CYSTOTOMY ,URINARY incontinence ,HEALTH outcome assessment ,FUNCTIONAL assessment - Abstract
Objective:Functional outcomes after ileal bladder substitution reflect the expectations of future patients at a particular centre. The aim of this study was to use validated questionnaires and a pad-weighing test to investigate functional outcomes after neobladder reconstruction at long-term follow-up in patients at a single centre. Materials and methods:During 2005 − 2015, 75 patients received a Studer ileal bladder substitute at the Department of Urology, Malmö. Forty-six of these patients were alive for follow-up and were evaluated using the pad-weighing test and the International Consultation on Incontinence Questionnaire–Urinary Incontinence Short Form (ICIQ-UI-SF), the Female Sexual Function Index (FSFI) and the International Index of Erectile Function (IIEF). Results:Five of 37 evaluable patients (14%) were considered fully continent, reporting a pad-weighing test result of 0 g and an ICIQ-UI-SF score of 0. The median ICIQ-UI-SF score was 8 [interquartile range (IQR) 3–11], and seven patients (17%) were continent according to the ICIQ-UI-SF score only. In the pad-weighing test, 28 out of 37 patients (76%) reported 0 g day-time leakage whereas only 12 out of 37 patients (32%) reported 0 g night-time leakage. At follow-up, nine out of 39 (23%) of evaluable male patients were potent. The median ICIQ-UI-SF score was significantly lower during the second half of the study period [4 (IQR 0–8) vs 10 (IQR 6–14);p = .003]. The inverse applied to the median IIEF score [5 (IQR 3–12) vs 2 (IQR 1–4);p = .02]. Conclusions:Functional outcomes at long-term follow-up after radical cystectomy and Studer ileal bladder substitute were at best modest in this series. Better outcomes during the second half of the study period might be explained by improved patient selection and a refined surgical technique, but possibly also by longer follow-up of patients during the first half of the period resulting in a more pronounced time-dependent decline in functional outcomes. [ABSTRACT FROM PUBLISHER]
- Published
- 2017
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- View/download PDF
40. Fast-track access to urologic care for patients with macroscopic haematuria is efficient and cost-effective: results from a prospective intervention study.
- Author
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Liedberg, Fredrik, Gerdtham, Ulf, Gralén, Katarina, Gudjonsson, Sigurdur, Jahnson, Staffan, Johansson, Irene, Hagberg, Oskar, Larsson, Staffan, Lind, Anna-Karin, Löfgren, Annica, Wanegård, Jenny, Åberg, Hanna, Nilbert, Mef, Gralén, Katarina, Löfgren, Annica, Wanegård, Jenny, and Åberg, Hanna
- Subjects
HEMATURIA diagnosis ,MEDICAL errors ,EARLY medical intervention ,EARLY detection of cancer ,BLADDER tumors ,COST effectiveness ,CREATININE ,CYSTOSCOPY ,DIAGNOSIS ,HEALTH service areas ,HEMATURIA ,INTERVIEWING ,LONGITUDINAL method ,MEDICAL care ,MEDICAL care costs ,MEDICAL referrals ,PATIENTS ,UROLOGY ,HELPLINES ,EVALUATION of human services programs ,ECONOMICS - Abstract
Background: The delay between onset of macroscopic haematuria and diagnosis of bladder cancer is often long.Methods: We evaluated timely diagnosis and health-care costs for patients with macroscopic haematuria given fast-track access to diagnostics. During a 15-month period, a telephone hotline for fast-track diagnostics was provided in nine Swedish municipalities for patients aged ⩾50 years with macroscopic haematuria. The control group comprised 101 patients diagnosed with bladder cancer in the same catchment area with macroscopic haematuria who underwent regular diagnostic process.Results: In all 275 patients who called 'the Red Phone' hotline were investigated, and 47 of them (17%) were diagnosed with cancer and 36 of those had bladder cancer. Median time from patient-reported haematuria to diagnosis was 29 (interquartile range (IQR) 14-104) days and 50 (IQR 27-165) days in the intervention and the control group, respectively (P=0.03). The median health-care costs were lower in the intervention group (655 (IQR 655-655) EUR) than in the control group (767 (IQR 490-1096) EUR) (P=0.002).Conclusions: Direct access to urologic expertise and fast-track diagnostics is motivated for patients with macroscopic haematuria to reduce diagnostic intervals and lower health-care expenditures. [ABSTRACT FROM AUTHOR]- Published
- 2016
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- View/download PDF
41. Origin of Atlantic salmon (Salmo salar) at sea in Icelandic waters.
- Author
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Olafsson, Kristinn, Einarsson, Sigurdur M., Gilbey, John, Pampoulie, Christophe, Hreggvidsson, Gudmundur O., Hjorleifsdottir, Sigridur, and Gudjonsson, Sigurdur
- Subjects
MICROSATELLITE repeats ,ATLANTIC salmon fisheries ,FISHERY management ,ECOSYSTEM dynamics ,BIODIVERSITY conservation - Abstract
The origin and life history of 186 Atlantic salmon caught at sea within Icelandic waters were investigated using microsatellites to assess the origin and scales and otoliths to assess freshwater and sea age. A total of 184 samples were aged using scales or otolithes or both. Most of the samples were from individuals in their first year at sea (72.8%). The freshwater age varied from 1 to 5 years with an average of 2.6 years. The most common freshwater age was 2 years (42%), with a further substantial proportion of 3-year-old fish (28%). Genetic assignment of individual fish to their most likely population of origin was performed using Bayesian genetic individual assignments with a baseline consisting of 284 Eastern Atlantic rivers and 466 sample sites genotyped at the 14 microsatellite. A total of 186 samples of salmon caught at sea were assigned to their origin. Eight samples, from post-smolts and caught close to land, were assigned as having come from Iceland. Of the remaining 178 samples, 121 individuals (68%) were from the Southern Group, i.e. from mainland Europe, the UK, and Ireland, 53 individuals (30%) were from the Northern Group, i.e. Scandinavia and Northern Russia, and 4 individuals were from Iceland (2%). Stock mixture proportions were estimated for four periods using ONCOR and cBAYES. Stock mixture analysis generally supported the individual assignments, but did not suggest a seasonal component to the distribution of salmon stocks. These results indicate that the sea south and east of Iceland are important as feeding areas for migrating Atlantic salmon, particularly for salmon originating in the UK, Ireland, and southern Europe. Furthermore, the lack of adult Icelandic fish so close to Iceland is remarkable and suggests that Atlantic salmon from Icelandic stocks are using different feeding grounds. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
42. [18 F]Fluorodeoxyglucose - positron emission tomography/computed tomography improves staging in patients with high-risk muscle-invasive bladder cancer scheduled for radical cystectomy.
- Author
-
Kollberg, Petter, Almquist, Helen, Bläckberg, Mats, Cronberg, Carin, Garpered, Sabine, Gudjonsson, Sigurdur, Kleist, Jakob, Lyttkens, Kerstin, Patschan, Oliver, and Liedberg, Fredrik
- Subjects
POSITRON emission tomography ,COMPUTED tomography ,BLADDER cancer patients ,CYSTECTOMY ,PREOPERATIVE care - Abstract
Objective. The aim of this study was to evaluate the clinical use of [
18 F]fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) in addition to conventional preoperative radiological investigations in a defined group of patients with high-risk muscle-invasive bladder cancer. Materials and methods. In total, 103 patients with high-risk muscle-invasive bladder cancer defined as stage T3/T4 disease or as stage T2 with hydronephrosis or high-risk histological features, who were provisionally scheduled to undergo cystectomy, were prospectively recruited to the study. The patients were referred to FDG-PET/CT in addition to standard preoperative investigation with computed tomography (CT). The final treatment decision was reached at a multidisciplinary conference based on all available information including the FDG-PET/CT findings. Results. Compared to CT alone, FDG-PET/CT provided more supplemental findings suggesting malignant manifestations in 48 (47%) of the 103 patients. The additional FDG-PET/CT findings led to an altered provisional treatment plan in 28 out of 103 patients (27%), detection of disseminated bladder cancer and subsequent cancellation of the initially intended cystectomy in 16 patients, and identification of disseminated disease and treatment with induction chemotherapy before radical cystectomy in 12 patients. Conclusions. Preoperative FDG-PET/CT changed the treatment plan for a considerable proportion (27%) of the present patients. Accordingly, such examination can potentially improve the preoperative staging of cystectomy patients with high-risk features, and may also reduce the number of futile operations in patients with advanced disease who are beyond cure. [ABSTRACT FROM AUTHOR]- Published
- 2015
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- View/download PDF
43. Simplified intraoperative sentinel-node detection performed by the urologist accurately determines lymph-node stage in prostate cancer.
- Author
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Kjölhede, Henrik, Bratt, Ola, Gudjonsson, Sigurdur, Sundqvist, Pernilla, and Liedberg, Fredrik
- Subjects
PROSTATE cancer ,LYMPH node surgery ,BIOPSY ,TUMORS ,UROLOGY - Abstract
Objective. The reference standard for lymph-node staging in prostate cancer is currently an extended pelvic lymph-node dissection (ePLND), which detects most, but not all, regional lymph-node metastases. As an alternative to ePLND, sentinel-node dissection with preoperative isotope injection and imaging has been reported. The objective was to determine whether intraoperative sentinel-node detection with a simplified protocol can accurately determine lymph-node stage in prostate cancer patients. Materials and methods. Patients with biopsy-verified high-risk prostate cancer with tumour stage T2-3 were included in the study. All patients underwent both ePLND and sentinel-node detection.
99m Tc-marked nanocolloid was injected peritumourally by the operating urologist after induction of anaesthesia just before surgery. Sentinel nodes were detected both in vivo and ex vivo intraoperatively using a gamma probe. Sentinel nodes and metastases and their locations were recorded. Sensitivity and specificity were calculated. Results. At least one sentinel node was detected in 72 (87%) of the 83 patients. In 13 (18%) of these 72 patients sentinel nodes were detected outside the ePLND template. In six of these 13 patients, the Sentinel nodes from outside the template contained metastases, which proved to be the only metastases in two. For 12 patients the only metastatic deposit found was a micrometastasis (≤2 mm) in a sentinel node. In the 72 patients with detectable sentinel nodes, pathological analysis of the sentinel node correctly categorized 71 and ePLND 70 patients. Conclusions. This protocol yielded results comparable to the commonly used technique of sentinel-node detection, but with more cases of non-detection. [ABSTRACT FROM AUTHOR]- Published
- 2015
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- View/download PDF
44. Present-Day Genetic Structure of Atlantic Salmon (Salmo salar) in Icelandic Rivers and Ice-Cap Retreat Models.
- Author
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Olafsson, Kristinn, Pampoulie, Christophe, Hjorleifsdottir, Sigridur, Gudjonsson, Sigurdur, and Hreggvidsson, Gudmundur O.
- Subjects
ATLANTIC salmon ,FISH genetics ,ICE caps ,CLIMATOLOGY ,MICROSATELLITE repeats ,FISH populations - Abstract
Due to an improved understanding of past climatological conditions, it has now become possible to study the potential concordance between former climatological models and present-day genetic structure. Genetic variability was assessed in 26 samples from different rivers of Atlantic salmon in Iceland (total of 2,352 individuals), using 15 microsatellite loci. F-statistics revealed significant differences between the majority of the populations that were sampled. Bayesian cluster analyses using both prior information and no prior information on sampling location revealed the presence of two distinguishable genetic pools - namely, the Northern (Group 1) and Southern (Group 2) regions of Iceland. Furthermore, the random permutation of different allele sizes among allelic states revealed a significant mutational component to the genetic differentiation at four microsatellite loci (SsaD144, Ssa171, SSsp2201 and SsaF3), and supported the proposition of a historical origin behind the observed variation. The estimated time of divergence, using two different ABC methods, suggested that the observed genetic pattern originated from between the Last Glacial Maximum to the Younger Dryas, which serves as additional evidence of the relative immaturity of Icelandic fish populations, on account of the re-colonisation of this young environment following the Last Glacial Maximum. Additional analyses suggested the presence of several genetic entities which were likely to originate from the original groups detected. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
45. Preoperative staging of locally advanced bladder cancer before radical cystectomy using 3 tesla magnetic resonance imaging with a standardized protocol.
- Author
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Liedberg, Fredrik, Bendahl, Pär-Ola, Davidsson, Thomas, Gudjonsson, Sigurdur, Holmer, Magnus, Månsson, Wiking, and Wallengren, Nils-Olof
- Subjects
CYSTECTOMY ,BLADDER cancer ,CYSTOTOMY ,MAGNETIC resonance imaging of cancer ,TRANSURETHRAL prostatectomy ,POSTOPERATIVE period - Abstract
Objective. The correlation between clinical tumour stage and pathological tumour stage in radical cystectomy specimens in locally advanced bladder cancer is suboptimal. Radiological methods have so far been of limited value in preoperative staging; however, the resolution with magnetic resonance imaging (MRI) has improved with further technical developments of the method. The aim of this study was to compare tumour stage at MRI with pathological tumour stage in the cystectomy specimen. Material and methods. Prospectively, 53 patients with invasive bladder cancer were preoperatively investigated with 3 tesla (3T) MRI using a standardized protocol. 3T MRI was performed at a standardized bladder volume. Clinical tumour stage, tumour stage at MRI and pathological tumour stage groups (Ta, Cis, T1/T2a, T2b/T3a, T3b/T4a), were compared, and sensitivity and specificity for organ-confined and non-organ-confined disease (stage T3a or above or lymph-node metastases) were analysed. Results. MRI overestimated tumour stage in 23 out of 47 patients (49%), whereas six patients (13%) were understaged. In the three groups of patients (those with the same stage group at MRI as in the cystectomy specimen, overestimated tumour stage and understaged patients), the time interval between transurethral resection of the bladder (TURB) and MRI did not differ significantly. Conclusions. Preoperative MRI overestimated tumour stage in almost half of the patients investigated in this study. Postoperative changes could have contributed to such overstaging with MRI. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
46. DNA methylation analyses of urothelial carcinoma reveal distinct epigenetic subtypes and an association between gene copy number and methylation status.
- Author
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Lauss, Martin, Aine, Mattias, Sjödahl, Gottfrid, Veerla, Srinivas, Patschan, Oliver, Gudjonsson, Sigurdur, Chebil, Gunilla, Lövgren, Kristina, Fernö, Mårten, Månsson, Wiking, Liedberg, Fredrik, Ringnér, Markus, and Höglund, David Lindgren Mattias
- Published
- 2012
- Full Text
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47. Integrated Genomic and Gene Expression Profiling Identifies Two Major Genomic Circuits in Urothelial Carcinoma.
- Author
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Lindgren, David, Sjödahl, Gottfrid, Lauss, Martin, Staaf, Johan, Chebil, Gunilla, Lövgren, Kristina, Gudjonsson, Sigurdur, Liedberg, Fredrik, Patschan, Oliver, Månsson, Wiking, Fernö, Mårten, and Höglund, Mattias
- Subjects
TRANSITIONAL cell carcinoma ,GENOMICS ,CHROMOSOME abnormalities ,GENETIC mutation ,GENE expression - Abstract
Similar to other malignancies, urothelial carcinoma (UC) is characterized by specific recurrent chromosomal aberrations and gene mutations. However, the interconnection between specific genomic alterations, and how patterns of chromosomal alterations adhere to different molecular subgroups of UC, is less clear. We applied tiling resolution array CGH to 146 cases of UC and identified a number of regions harboring recurrent focal genomic amplifications and deletions. Several potential oncogenes were included in the amplified regions, including known oncogenes like E2F3, CCND1, and CCNE1, as well as new candidate genes, such as SETDB1 (1q21), and BCL2L1 (20q11). We next combined genome profiling with global gene expression, gene mutation, and protein expression data and identified two major genomic circuits operating in urothelial carcinoma. The first circuit was characterized by FGFR3 alterations, overexpression of CCND1, and 9q and CDKN2A deletions. The second circuit was defined by E3F3 amplifications and RB1 deletions, as well as gains of 5p, deletions at PTEN and 2q36, 16q, 20q, and elevated CDKN2A levels. TP53/MDM2 alterations were common for advanced tumors within the two circuits. Our data also suggest a possible RAS/RAF circuit. The tumors with worst prognosis showed a gene expression profile that indicated a keratinized phenotype. Taken together, our integrative approach revealed at least two separate networks of genomic alterations linked to the molecular diversity seen in UC, and that these circuits may reflect distinct pathways of tumor development [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
48. A Systematic Study of Gene Mutations in Urothelial Carcinoma; Inactivating Mutations in TSC2 and PIK3R1.
- Author
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Sjödahl, Gottfrid, Lauss, Martin, Gudjonsson, Sigurdur, Liedberg, Fredrik, Halldén, Christer, Chebil, Gunilla, Månsson, Wiking, Höglund, Mattias, and Lindgren, David
- Subjects
GENETIC mutation ,TRANSITIONAL cell carcinoma ,PEDIATRIC neurology ,INTELLECTUAL disabilities ,PHAKOMATOSES ,GENETIC regulation ,CANCER genes - Abstract
Background: Urothelial carcinoma (UC) is characterized by frequent gene mutations of which activating mutations in FGFR3 are the most frequent. Several downstream targets of FGFR3 are also mutated in UC, e.g., PIK3CA, AKT1, and RAS. Most mutation studies of UCs have been focused on single or a few genes at the time or been performed on small sample series. This has limited the possibility to investigate co-occurrence of mutations. Methodology/Principal Findings: We performed mutation analyses of 16 genes, FGFR3, PIK3CA, PIK3R1 PTEN, AKT1, KRAS, HRAS, NRAS, BRAF, ARAF, RAF1, TSC1, TSC2, APC, CTNNB1, and TP53, in 145 cases of UC. We show that FGFR3 and PIK3CA mutations are positively associated. In addition, we identified PIK3R1 as a target for mutations. We demonstrate a negative association at borderline significance between FGFR3 and RAS mutations, and show that these mutations are not strictly mutually exclusive. We show that mutations in BRAF, ARAF, RAF1 rarely occurs in UC. Our data emphasize the possible importance of APC signaling as 6% of the investigated tumors either showed inactivating APC or activating CTNNB1 mutations. TSC1, as well as TSC2, that constitute the mTOR regulatory tuberous sclerosis complex were found to be mutated at a combined frequency of 15%. Conclusions/Significance: Our data demonstrate a significant association between FGFR3 and PIK3CA mutations in UC. Moreover, the identification of mutations in PIK3R1 further emphasizes the importance of the PI3-kinase pathway in UC. The presence of TSC2 mutations, in addition to TSC1 mutations, underlines the involvement of mTOR signaling in UC. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
49. Novel set of multiplex assays (SalPrint15) for efficient analysis of 15 microsatellite loci of contemporary samples of the Atlantic salmon ( Salmo salar).
- Author
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OLAFSSON, KRISTINN, HJORLEIFSDOTTIR, SIGRIDUR, PAMPOULIE, CHRISTOPHE, HREGGVIDSSON, GUDMUNDUR OLI, and GUDJONSSON, SIGURDUR
- Subjects
ATLANTIC salmon ,MICROSATELLITE repeats ,DNA polymerases ,SALMON ,GENETIC research ,POLYMERASE chain reaction - Abstract
We report the development of new PCR assays and loading panels for the Atlantic salmon using 15 microsatellite loci. A total of 8, 3 and 4 loci were coamplified in three separate PCRs using labelled primers and loaded on the ABI DNA analyzer in two separate panels. Amplified alleles were clearly typed, and easily interpretable results were obtained. The method was successfully applied in different laboratories, even when different types of DNA polymerase were employed. The method is useful for analysing paternity, population genetics and conservation as well as for selective breeding programmes. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
50. 1174 LONG-TERM FOLLOW-UP OF RENAL FUNCTION AFTER CONTINENT CUTANEOUS DIVERSION A.M. LUNDIANA
- Author
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Mansson, Wiking, Davidsson, Thomas, Xu, Abai, Gudjonsson, Sigurdur, and Liedberg, Fredrik
- Published
- 2012
- Full Text
- View/download PDF
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