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Introduction: Gallbladder diseases are prevalent worldwide and present with a diverse histopathological spectrum. Mucosal irritation and chronic inflammation is considered as an important etiological factor for the mechanical or functional dysfunction of emptying of the gallbladder. This study aims to find the prevalence of non-neoplastic lesions of gallbladder among cholecystectomy specimens of a tertiary care center. Methods: A descriptive cross-sectional study was conducted in the Department of Pathology, of a tertiary care center from January 2005 to December 2020. Ethical approval was taken from the Institutional Review Committee. All the patients who had undergone cholecystectomy procedures which showed non-neoplastic lesions were enrolled in the study. Convenient sampling was done. Statistical Package for Social Sciences version 21 and Microsoft Excel were used for data analysis. Point estimate at 95% Confidence Interval was calculated along with frequency and proportion forbinary data. Results: Out of 4914 cholecystectomy specimens, 4852 (98.73%) (95% Confidence Interval= 98.42- 99.04) were non-neoplastic lesions. There were 1252 (25.8%) males and 3600 (74.2%) females with a male to female ratio of 1:2.87. Age ranged from 2 to 89 years with a mean age of 45±14.48 years. Gallbladder lesions were observed maximum in age group 41-50 years with 1200 (24.7%) cases. Among the non-neoplastic lesions, cholecystitis without any specific finding was the most common finding with 3028 (62.4%) cases followed by cholelithiasis with 1478 (30.5%) cases. Conclusions: The prevalence of non-neoplastic lesions of gallbladder is similar to other studies done in similar setings. Female predominance was noted in non-neoplastic lesions.

Highlights • Extra-gastrointestinal stromal tumors are rare tumors of mesenchymal origin. • Mesenteric origin of this tumor tends to reach a considerable size. • Tumor cells in routine H&E stain may resemble like sarcomatoid mesothelioma. • IHC study plays an important role in cellular differentiation of the tumor., Introduction and importance Extra-gastrointestinal stromal tumors are group of soft tissue neoplasm, which originates outside the gastrointestinal tract comprising of less than 5% of the total gastrointestinal stromal tumors. Case presentation A 67 years old male came with a history of vague abdominal pain, discomfort and loss of appetite. Per abdominal examination showed a palpable firm mass which was filling both the flanks. Radiological imaging revealed a large abdomino-pelvic mass with central necrotic areas. Exploratory laparotomy was done and the mass was excised intact from the sigmoid mesocolon. Histopathological diagnosis was given as extra-gastrointestinal stromal tumors. Clinical discussion Extra-gastrointestinal stromal tumor was first described by Miettinen et al. in 1999. The tumor can arise from the pleura, omentum, mesentery, retroperitoneum and prostate. The clinical presentation of the tumor depends on its location and the size of tumor. Patients with these tumors present with abdominal pain, followed by abdominal mass and distention. These tumors show pathological, immunohistochemical and molecular biological characters similar as that of gastrointestinal stromal tumor. Conclusion Extra-gastrointestinal stromal tumor is a rare tumor and can reach to a considerable large size before presenting with clinical symptoms especially if the tumor arises from the mesocolon. IHC study plays an important role to reach to the final diagnosis as the tumor can mimic mesothelioma in routine staining.

A 15-year-old boy reported a 2-month history of severe left thigh pain Physical examination revealed left thigh swelling measuring 6x5 cm. X-ray of the region showed mixed lytic and sclerotic lesion involving the femoral head and neck. A Computed Tomography scan showed mixed lytic and sclerotic lesion involving the femoral head and neck with cortical irregularity and mild periosteal reaction with associated soft tissue in the anterior aspect. Magnetic resonance imaging demonstrated heterogeneous signal intensity lesion with areas of sclerosis involving the femoral head and neck. The large associated soft tissue in the anterior aspect appears predominantly hyperintense on T2W images. On post-contrast axial and sagittal images, heterogeneous enhancement with areas of necrosis involving soft tissue was seen. A presumptive radiological differential diagnosis of Ewing Sarcoma and Osteosarcoma was made. However, on histopathology, it was a case of mesenchymal chondrosarcoma.

Highlights • Intracranial epidermoid cysts are benign congenital tumors. • The typical appearance on CT scan is a non-enhancing fat density lesion with calcification. • Rupture of intracranial epidermoid cyst is a rare phenomenon. • Recurrence of the tumor may reflect incomplete initial removal due to the protection of adjacent neurovascular structures., Introduction Intracranial epidermoid cysts are congenital tumors that develop from ectodermal remnants during neuroembryogenesis between the third and fifth weeks of gestation. These tumors are benign and usually present with local mass effect. Here, we present a rare case of ruptured intracranial epidermoid cyst with recurrence. Presentation of case A 55 years old male patient was brought to emergency with a history of headache and loss of consciousness for 1 h. Radiological imaging showed the features suggestive of ruptured intracranial epidermoid cyst which was operated. Two years later the patient re-presented with headache for 4–5 days where repeat MRI revealed recurrence of the tumor. Discussion Epidermoid cysts are very slow growing tumor at a linear rate due progressive accumulation of normally dividing epidermal cells. These tumors often reach a large size before the onset of symptoms. At times, the tumor capsule may show infiltration to the brain parenchyma and tight adherence to neurovascular structures which leads to the incomplete removal of the tumor capsule leading to recurrence of tumor. Conclusion Rupture of intracranial epidermoid cyst is a rare phenomenon and recurrence of this tumor in patients is even infrequent.

Objective: Anomaly scan at the second trimester provides the detail anatomical study of fetus. Any structural or morphological defects detected prenatally guides the parents and doctors for further counseling. The main objective of this study was to detect the fetal congenital anomalies in high risk patients at 18-22 weeks and highlight the effectiveness of prenatal ultrasound examination. Materials and Methods: This was a hospital based descriptive study done during the period of 2017 January to 2019 January in the department of Radiology, ultrasound unit, Pokhara Academy of Health Sciences, Nepal. Pregnant women who were first examined and evaluated by the Obstetrician during the ante-natal check up (ANC) either by asking the patient history or by mother age or any symptoms or chance of being abnormalities or high risk patients during that time frame (18-22 weeks) were enrolled for the study. Maternal age, parity, any history of previous anomalies, previous history of miscarriage/Intra Uterine Fetal Demise ( IUFD) or any exposure to radiation or drugs, history of other disease were recorded during the filling of consent form. High risk patients were identified by the Obstetrician and anomaly examination was prescribed at second trimester (18-20 weeks). Descriptive analysis was done using SPSS 20. Results: There were two hundred and twenty four patients who had undergone anomaly (targeted fetal anatomy) examination which were referred for “anomaly scan” from the gynaecology and obstetrics department during that period. Among all the cases, fourteen cases had anomalies detected during the scan (18-22 weeks). Out of which seven cases had central nervous system related anomalies, two cases had skeletal deformities (dysplasia), two case had urinary tract related anomalies, one had lungs related anomalies and one had single umbilical artery with polyhydroamnios associated with duodenal atresia and one case had malformation of lymphatic system ( cystic hygroma ) Conclusion: Our study revealed that ultrasound scan performed between 18-22 weeks of pregnancy is effective in diagnosing major fetal abnormalities in the high-risk patients.

Introduction The density of gallbladder carcinoma differs in different parts of the world. It is an aggressive tumor with poor prognosis presenting in advanced stages due to paucity of signs and symptoms. This research was conducted to analyze the frequency of incidental and clinically suspected gallbladder carcinoma with clinicopathological correlation. Methods This is a retrospective cohort study conducted in the Department of Pathology, Manipal College of Medical Sciences, Pokhara, Nepal from January 2005 to December 2020. Results The study included 35 cases of gallbladder carcinoma compiled over a period of 16 years. There were 11 males and 24 females with a male to female ratio of 1: 2.1. Age ranged from 29 to 75 years with a mean age of 56.51 ± 11.38 years. Incidental carcinoma was observed in 26 (74.28%) cases while clinically suspected carcinoma was identified in 9 (25.71%) cases. Gallstone was associated in 14 (40%) cases of incidental carcinoma. Tumor staging of both incidental and clinically suspected carcinomas showed 13 (37.14%) cases in T1 stage, 15 (42.85%) cases in T2 stage and 7(20%) cases in T3 stage. Conclusion Our analysis established prevalance of gallbladder carcinoma from 5th to 7th decades with female predominance and higher association of gallstones in incidental carcinoma. The principal histology in incidental carcinoma was well differentiated carcinoma while poorly differentiated carcinoma was encountered only in clinically suspected carcinoma., Highlights • Gallbladder carcinoma is an aggressive tumor with poor prognosis. • Early diagnosis of gallbladder carcinoma is rare. • Incidental carcinomas are more frequent than clinically suspected carcinomas. • Incidental carcinomas have more association with gallstones. • Clinically suspected carcinoma shows higher stage of tumor.

Uterine adenosarcoma is a rare variant of mixed Mullerian tumors comprised of neoplastic glands with the benign appearance and sarcomatous stroma. The epithelium most often consists of endometrium- like cells, while the sarcomatous component usually shows low-grade homologous uterine sarcoma. These tumors present as a pelvic mass or an enlarged uterus with abnormal vaginal bleeding. Here, we present a case of 61 years old postmenopausal female patient with chief complaints of excessive vaginal bleeding and urine retention.

Lesions which project from the gallbladder wall into its lumen are known as gallbladder polyps. Nearly 5% of all adults have gallbladder polyps, the majority are pseudo-polyps with no neoplastic potential. Although gallbladder polyps are commonly found in cholecystectomy specimen, only a very few gallbladder polyps present as carcinoma in a polypoid lesion.A 48 years old male patient came for a routine health checkup and ultrasonography (USG) of abdomen showed incidental finding of a polypoid lesion measuring 43 × 28 mm in the gallbladder. Computed tomography scan revealed a soft tissue mass of similar size almost filling the lumen of the gallbladder and showed notable enhancement in post-contrast images. The mass was concluded to be suggestive of gallbladder carcinoma. Extended radical cholecystectomy was performed and histopathological examination of the polypoid lesion showed papillary adenocarcinoma with tumor staging of T2b.The prevalence of polypoid lesions of the gallbladder are reported to be 2-12% of all cholecystectomy specimens. Gallbladder polyps are one of the common USG findings in general population. It is difficult to differentiate between the benign and malignant polypoid lesions of the gallbladder solely depending on imaging studies. A size larger than 10 mm is the best indicator of malignancy. The most common malignant gallbladder polyp is adenocarcinoma.In majority of the cases, gallbladder polyp is an incidental finding. Even though most of the gallbladder polyps are benign in nature, cholecystectomy is the treatment of choice if the suspicion for malignancy is high.

Introduction: Thyroid gland lesions are the most common endocrine disorders encountered globally. Diseases of the thyroid gland present with either an alteration of hormone secretion or as an enlargement of the thyroid gland. The objective of the study is to find the frequency of different thyroid lesions. Methods: A descriptive cross-sectional study was conducted at Manipal Teaching Hospital, Pokhara from Jan 2005 to Jan 2020. Ethical approval was taken from the Institutional Review Committee (Ref: 330). Patients who had undergone thyroidectomy procedures for both non-neoplastic and neoplastic thyroid lesions were enrolled. Convenient sampling was done. IBM Statistical Package for Social Sciences version 21 and Microsoft Excel were used. Results: Out of 345 thyroidectomy specimens, 246 (71.3%) cases of non-neoplastic lesions, and 99 (28.69%) cases of neoplastic lesions were present. There were 54 males and 291 females with a male to female ratio of 1:5.4. The age ranged from 9 to 76 years with a mean age of 43.67 years. In non-neoplastic lesions, the predominant lesion was the colloid goiter with 205 (83.33%) cases followed by Grave’s disease and lymphocytic thyroiditis with 14 (5.69%) cases each. In neoplastic lesions, papillary carcinoma was the commonest lesion with 56 (56.56%) cases followed by follicular carcinoma with 14 (14.14%) cases and follicular adenoma with 13 (13.13%) cases. There were also 9 (9.09%) cases of anaplastic carcinoma in neoplastic lesions. Conclusions: Colloid goiter and papillary carcinoma was the most commonly encountered non-neoplastic and neoplastic lesion with a female predominance. Rare tumors like anaplastic carcinoma, papillary carcinoma, and follicular carcinoma with anaplastic transformation were also encountered.

Introduction: Salivary gland tumors are rare, comprising about 3% of all head and neck neoplasms. About 80% of the tumors are in parotids, 10% in submandibular glands and the remainders are distributed in sublingual and minor salivary glands. This study was conducted to evaluate the relative frequencies, types, site of distribution and the histopathological features of salivary gland tumors. Methods: A descriptive cross-sectional study was conducted in the Department of Pathology, Manipal College of Medical Sciences, Pokhara from January 2011 to December 2019. Ethical approval was taken from the institutional review committee of Manipal College of Medical Sciences (Ref: 314). Convenient sampling was done among specimen. Data were entered in Microsoft Excel and analyzed using Statistical Package for the Social Sciences version 21. Results: Among the 130 specimens, the patients’ age ranged from 6 to 78 years with a mean age of 37.26 years for benign tumors and 48.45 years for malignant tumors. There was female predominance with a male to female ratio of 1:1.36. There were 98 cases of benign tumors, commonest being pleomorphic adenoma with 82 (83.67%) cases which was noticed more frequently in fourth decade of life. Among the 32 malignant tumors, mucoepidermoid carcinoma was the commonest tumor 20 (62.5%), followed by adenoid cystic carcinoma 7 (23.33%). Conclusions: Benign salivary gland tumors were more common than malignant tumors and the most common site of location was the parotid for both the benign and malignant tumors. Female outnumbered the male population in benign tumors whereas males were slightly more than females in malignant tumors. This study corroborated well with other previously published studies.

Introduction and importance Renal cell carcinoma is the most common malignant tumor of the kidney which occurs more frequently in men and older people than in women and young adults. Renal cell carcinoma is the second most common renal malignancy diagnosed among pediatric and adolescent patients comprising of 2% to 6% of renal cancers. Case presentation A 19 years old young adult male came with a history of epigastric and back pain, hematuria and weight loss. Per abdominal examination showed a palpable mass in the epigastric and left hypochondriac region. Radiological imaging showed diffuse infiltration of renal interstitium with multiple hypodense lesions in left kidney, renal vein infiltration, and lytic destruction of vertebral bodies and left superior pubic ramus. Fine needle aspiration cytology and trucut biopsy was taken which confirmed renal cell carcinoma, clear cell type with bone metastasis. Clinical discussion Although most renal cell carcinoma is sporadic and relatively uncommon in young adults, the incidence of renal cell carcinoma in this age group has steadily increased. Young adults are less likely to receive diagnosis of renal cell carcinoma incidentally. A few reported pediatric series have shown that renal cell carcinoma is highly aggressive, tends to be invasive, and metastasizes to the lungs and bones. Conclusion Young adult with clear cell renal cell carcinoma showing wide spread metastasis is rare. Since, young age is an independent prognostic factor for cancer-specific survival, early diagnosis of the tumor will be beneficial for patients., Highlights • Renal cell carcinoma with wide spread metastasis is rare in young adults. • Young adults are more likely to present with symptoms. • Symptomatic tumor presentations did not decreased despite modern imaging technique. • Younger and generally healthier population rarely come for tumor screening.

Solar Photovoltaic system has become popular among the renewable energy due to free availability and low maintenance costs. Economically, the decreasing cost from continuous development adds another motive for the use of photovoltaic system. There has been a continuous study regarding the estimation on output of the photovoltaic system, in normal operating conditions. The output is subject to variations due to various environmental factors. The aim of this study is to evaluate how Design of Experiments (DoE) Method is used to model the impact of meteorological data on the electric power generated by the photovoltaic system. In this paper, the simulation and experiment based analysis has been presented and the degree of impact of irradiance and temperature on the output power of the photovoltaic module has been illustrated.Journal of the Institute of Engineering, 2016, 12(1): 1-9

Extracranial meningiomas may be subdivided into primary and secondary types based on absence or presence of intracranial attachments respectively. Primary sinonasal tract meningiomas are rare with unknown etiopathology and non-specific clinical presentation. Of these PEMs only 11.5% are in the nasal cavity and nasal septum. To our knowledge less than 50 cases of PEM of nasal cavity have been reported in the literature. We report a case of a 22 years old male who presented with epistaxis and increasing nasal stuffiness for the last one year.

Lymphomas of the orbit and orbital adnexae are rare tumors, comprising only 1% of all non-Hodgkin’s lymphoma. Lymphomas are the most common primary orbital tumor in adults of age 60 years and older. Here we present a case of 49 year male with left upper lid swelling since 1 year who was diagnosed histopathologically as non-Hodgkin’s lymphoma of orbital region.

Familial gingival fibromatosis is a rare hereditary condition due to chromosomal abnormality which can occur as an isolated disease or as part of a syndrome and has an incidence of 1:350 000. This condition leads to esthetic, functional, psychological and masticatory disturbance of the oral cavity. Here, we present a case of 21-year-old female with severe enlargement of gums in maxilla and mandible. Deciduous teeth were erupted at normal age but the permanent teeth in the oral cavity were not erupted. Her grandmother, father and younger sister were also affected with the same condition. Incisional biopsy from the chronic ulcerated gingiva showed squamous cell carcinoma. Patient was referred to other cancer institution, where metastases to lung, bone and lymph node was detected on CT scan. The diagnosis was made based on clinical examination, family history and histopathological examination.

Hemangiomas and vascular malformations of the gastrointestinal tract are rare clinical entities that usually present as overt or occult bleeding. They can be distributed throughout the gastrointestinal system, or present as a singular cavernous hemangioma. Overall, 80% of such malformations are of cavernous subtype and are misdiagnosed as hemorrhoids and ulcerative colitis. Mucosal edema, nodularity and vascular congestion can lead to the incorrect diagnosis of inflammatory bowel disease. We present a case of 26-year-old male who presented with pain abdomen, bleeding per rectum and was treated as a case of ulcerative colitis for past 12 years on the basis of clinical and radiological features. As the patient did not respond, subtotal colectomy was done which on histopathologically reported as cavernous vascular malformation—diffuse infiltrating (expansive type).

Background: Approximately 10% of breast masses are breast cancer. It is important for women with a breast lump to receive appropriate evaluation. Mammography has been the “gold standard” in breast cancer detection for >40 years. Ultrasonography is non-invasive easily available, cheaper and accurate tool while Fine needle aspiration cytology has a high diagnostic accuracy rate in hands of experienced cytopathologist. Materials and methods: This was a retrospective and prospective study of 173 women attending radiology department in Manipal Teaching Hospital, Pokhara for mammography during a period of 18 months from January 2011 to June 2012.The age ranged from 20yrs to 75yrs. BIRADS score was given for both mammography and sonomammography. All malignant and suspicious cases had undergone fine needle aspiration cytology. Cytology reports were correlated with imaging study. Results: The most common age group for the breast lump was 40-49 years showing 65(37.57%) cases. Most lumps were seen on the left side 54.3% (94/ 173) cases and were seen in upper outer quadrant of the breast (74 cases). 11 cases each were given the BIRADS score of 4 in both mammography and sonomammography. Sensitivity and specificity of mammography and sonomammography were compared to cytologyreports. The sensitivity for mammogram was 73.7% while specificity was 96.3%. The sensitivity and specificity for sonomammogram was 78.9% and 95% respectively. Conclusion: Quadruple assessment i.e. clinical assessment, mammography, sonomammography and cytological study are the new “gold standard” in the investigation of breast disease. DOI: http://dx.doi.org/10.3126/jpn.v4i8.11499 Journal of Pathology of Nepal; Vol.4,No. 8 (2014) 630-634

Summary of Cytological Diagnoses Including both CT and USG guided FNAC cases, a totalof 264 cases (52.8%) were reported as ‘‘malignant,’’ 82cases (16.4%) as ‘‘inflammatory,’’ 103 cases (20.6%) as‘‘benign’’ lesions and 51 cases (10.2 %) as ‘‘inadequate’’for any opinion on cytology (Fig 1, Table I).Among 234 cases of CT-guided FNAC, 87.6% (205cases) had adequate material to report and were diagnosedas malignant (152 cases), inflammatory (38 cases), andbenign lesions (15 cases) while 12.4% (29 cases) did notshow adequate material on smears (Table I). Under CTguidance, the majority of the cases (79%, 185 cases) werefor pulmonary lesions followed by liver (7.2%, 17 cases).Table I also shows the data of all USG guided FNACdiagnoses and their respective sites. 266 cases of FNAChave been done under USG guidance, of which 244 cases(91.7%) had adequate material and 22 cases (8.3%) wereinadequate for any opinion. Among the adequate cases, 112were reported as malignant, 44 as inflammatory, and 88 asbenign lesions. Among USG guided cases, thyroid (27.4%,73 cases) was the commonest organ of aspiration followedby liver (25.2%, 67 cases) and breast (14.3%, 38 cases).

Hydatid disease is endemic in sheep and cattle-raising areas worldwide. Its prevalence is high in Nepal. The study was carried out to determine the clinical, radiological and pathological presentations of hydatid disease.This was a retrospective study of all hydatid disease cases reported in Department of Pathology, from August 1996 to July 2010. All the clinical, radiological and pathological data were collected and collated.A total of 51 cases of hydatidosis were studied. Patients presented with related symptoms in 47 cases, 92.16% with CI (84.78, 99.54) and asymptomatic in four cases, 7.84% with CI (0.46, 15.22). Involvement of liver and lung was found in 35 (68.63%) cases and 10 (19.61%) cases respectively. Involvement of other organs like kidney, pelvis and broad ligament were seen in 6 of the cases. Total 29 cases, 56.86% with CI (43.2, 70.46) had solitary cyst while rest of the cases had multiloculated cyst. All cases had radiological correlation and histopathological confirmation.Most cases presented with organ related vague symptoms, however it should be considered as a differential diagnosis especially in asymptomatic cases and cases with unusual sites. Imaging studies is useful in preoperative diagnosis and postoperative histopathology is confirmatory. A multicentric hospital based study will help to decrease the incidence.

Introduction: The concept of dividing extracranial head and neck into different spaces is a notion that dates back to the 1800s. Various studies have led to detailed description of the soft tissue spaces that are contained within the fascial layers. This study was carried out to determine the accuracy of computed tomogram (CT) in differentiating malignant from benign lesions in the neck, to study the spatial distribution of different types of histological groups in the neck and the prevalence of malignant versus benign diseases involving the neck. Methods: This was a hospital-based, prospective study conducted in the department of Radiodiagnosis, Kasturba Medical college, Mangalore, from 2005-2008. A hundred consecutive patients referred for CT scan examination presenting with complaints related to involvement of neck spaces or presence of palpable neck masses were enrolled in this study. The details of all the cases regarding their radiological fi ndings and histopathology were reviewed. Results: Of the 100 patients studied, 53 % had malignant lesions, out of which 43 % were squamous cell carcinoma and 4 % were metastatic lymph nodal involvement. Twenty percent of the lesions were of an infective origin while 23 % were benign and congenital cystic lesions. Conclusions: CT scan as an imaging modality has the ability to evaluate the malignant and benign tumors of the neck. Considering histopathology as the gold standard, the sensitivity of CT in detecting malignant/benign lesions was 96.5 % with a specifi city of 100 %. The positive predictive value was 100 % and the negative predictive value 95.2 %. Keywords: CT scan, neck mass, neck spaces.