Search

Your search keyword '"Onozato, Yasuhiro"' showing total 44 results
Start Over Author "Onozato, Yasuhiro"
44 results on '"Onozato, Yasuhiro"'

12. Two cases of early adenocarcinoma in the second portion of the duodenum successfully treated by endoscopic submucosal dissection using the clip-with-line method

Author

Onozato, Yasuhiro, primary, Iizuka, Haruhisa, additional, Sohara, Naondo, additional, Hagiwara, Satoshi, additional, Arai, Riki, additional, Ogawa, Tetsushi, additional, Tomizawa, Naoki, additional, Ito, Hideaki, additional, Sakamoto, Kazuha, additional, and Kakizaki, Satoru, additional

Published
2012
Full Text
View/download PDF

15. A case of early duodenal cancer complicated with hypopharyngeal cancer

Author

Onozato, Yasuhiro, primary, Iizuka, Haruhisa, additional, Sohara, Naondo, additional, Hagiwara, Satoshi, additional, Arai, Riki, additional, Tanahashi, Yoshifumi, additional, Ogawa, Tetsushi, additional, Tomizawa, Naoki, additional, Ito, Hideaki, additional, Sakamoto, Kazuha, additional, and Kakizaki, Satoru, additional

Published
2011
Full Text
View/download PDF

17. A case of small elevated early duodenal adenocarcinoma in the second portion of the duodenum successfully diagnosed by magnifying endoscopy with narrow-band imaging

Author

Onozato, Yasuhiro, primary, Iizuka, Haruhisa, additional, Sohara, Naondo, additional, Hagiwara, Satoshi, additional, Arai, Riki, additional, Ishihara, Hiroshi, additional, Ogawa, Tetsushi, additional, Tomizawa, Naoki, additional, Ito, Hideaki, additional, Kakizaki, Satoru, additional, and Fujimori, Takahiro, additional

Published
2010
Full Text
View/download PDF

27. Our therapeutic experience of the colonic perforation during the colonoscopy

Author

Iizuka, Haruhisa, primary, Onozato, Yasuhiro, additional, Ishihara, Hiroshi, additional, Sagawa, Toshihiko, additional, Mori, Kazuyo, additional, Arai, Hirotaka, additional, Takayama, Hisashi, additional, Abe, Takehiko, additional, Yoshimura, Sumihiko, additional, Sakamoto, Ichirou, additional, Yoshinari, Daisuke, additional, Tomizawa, Naoki, additional, Ogawa, Tetsushi, additional, Motegi, Atsushi, additional, and Ito, Hideaki, additional

Published
2006
Full Text
View/download PDF

28. A case report of delayed perforation due to endoscopic submucosal dissection (ESD) for early gastric cancer

Author

Onozato, Yasuhiro, primary, Iizuka, Haruhisa, additional, Sagawa, Toshihiko, additional, Yoshimura, Sumihiko, additional, Sakamoto, Ichirou, additional, Arai, Hirotaka, additional, Ishihara, Hiroshi, additional, Tomizawa, Naoki, additional, Ogawa, Tetsushi, additional, Takayama, Hisashi, additional, Abe, Takehiko, additional, Motegi, Atushi, additional, and Ito, Hideaki, additional

Published
2006
Full Text
View/download PDF

29. A case of esophageal granular cell tumor successfully resected by endoscopic submucosal dissection (ESD)

Author

Aoki, Haruka, primary, Onozato, Yasuhiro, additional, Iizuka, Haruhisa, additional, Sagawa, Toshihiko, additional, Arai, Hirotaka, additional, Takayama, Hisashi, additional, Abe, Takehiko, additional, Tomizawa, Naoki, additional, Ogawa, Tetsushi, additional, Ishihara, Hiroshi, additional, Motegi, Atushi, additional, and Ito, Hideaki, additional

Published
2005
Full Text
View/download PDF

30. Study of 11 cases which were performed endoscopic hemostasis for bleeding from the second portion of duodenum

Author

Sakamoto, Naomi, primary, Onozato, Yasuhiro, additional, Iizuka, Haruhisa, additional, Takizawa, Daichi, additional, Oyama, Tatsuya, additional, Toyoda, Mitsuo, additional, Yoshimura, Sumihiko, additional, Kakizaki, Satoru, additional, Arai, Hirotaka, additional, Takayama, Hisashi, additional, Ogawa, Tetsusi, additional, Tomizawa, Naoki, additional, Ishihara, Hiroshi, additional, Abe, Takehiko, additional, and Ito, Hideaki, additional

Published
2005
Full Text
View/download PDF

33. A case report of eary sigmoid colonic cancer : Endoscopic clip suture and indwelling transanal intraluminal drainage tube successfully treated colonic perforation due to submucosal dissection EMR

Author

Onozato, Yasuhiro, primary, Iizuka, Haruhisa, additional, Arakawa, Kazuhisa, additional, Arai, Hirotaka, additional, Abe, Takahiko, additional, Ishihara, Hiroshi, additional, Tomizawa, Naoki, additional, Ogawa, Tetushi, additional, and Itou, Hideaki, additional

Published
2004
Full Text
View/download PDF

34. A case of synchronous triple early gastric cancers that were endoscopically resected in a lump by utilizing marginated cutting and exfoliating method

Author

Nagashima, Mamiko, primary, Onozato, Yasuhiro, additional, Aiba, Masaaki, additional, Toyoda, Mitsuo, additional, Naganuma, Atsushi, additional, Arai, Hirotaka, additional, Abe, Takehiko, additional, Ishihara, Hiroshi, additional, Tomizawa, Naoki, additional, Ogawa, Tetsushi, additional, Ito, Hideaki, additional, and Okamura, Shinichi, additional

Published
2003
Full Text
View/download PDF

36. A Case of Peutz-Jeghers Syndrome-Small intestinal polyps treated with intraoperative laparoscope-assisted enteroscopy

Author

Onozato, Yasuhiro, primary, Sagawa, Toshihiko, additional, Abe, Takehiko, additional, Ishikawa, Takeshi, additional, Shimoda, Ryuya, additional, Ishihara, Hiroshi, additional, Ikeya, Toshio, additional, Ando, Tatsumasa, additional, Ogawa, Tetsuji, additional, Tanahashi, Yoshifumi, additional, Oshimoto, Hirokazu, additional, Saruya, Shinya, additional, Okamura, Shinichi, additional, and Mori, Masatomo, additional

Published
2000
Full Text
View/download PDF

37. A Case of Metabolic Acidosis with Hyperchloremia Induced by Prolonged Intravenous Administration of Branched Chain Amino Acid Enriched Solution for Hepatic Encephalopathy.

Author

Shimoda, Ryuya, primary, Abe, Takehiko, additional, Arai, Hirotaka, additional, Kosone, Takashi, additional, Hagiwara, Satoshi, additional, Onozato, Yasuhiro, additional, Ishihara, Hiroshi, additional, Itoh, Hideaki, additional, Iwasaki, Yasuki, additional, Nara, Mami, additional, Tsukioka, Gengo, additional, Suzuki, Hideyuki, additional, Yamazaki, Yuichi, additional, Ichikawa, Takeshi, additional, Takagi, Hitoshi, additional, Nagamine, Takeaki, additional, and Mori, Masatomo, additional

Published
2000
Full Text
View/download PDF

38. A Case of Early Ascending Colon Cancer of Approximately 40 mm in Size Treated by Endoscopic Microwave Coaguration Therapy

Author

Onozato, Yasuhiro, primary, Kobayashi, Izuru, additional, Ishihara, Hiroshi, additional, Yoshida, Makoto, additional, Motegi, Kenta, additional, Sakamoto, Teruhiko, additional, Muramatsu, Seiji, additional, Saruya, Shinya, additional, Iesaki, Keigo, additional, Washida, Yuji, additional, Kobayashi, Tsuneta, additional, Okamura, Shin-ichi, additional, Sekiguchi, Toshikazu, additional, and Mori, Masatomo, additional

Published
1996
Full Text
View/download PDF

40. Can endoscopic submucosal dissection be safely performed in a smaller specialized clinic?

Author

Sohara N, Hagiwara S, Arai R, Iizuka H, Onozato Y, and Kakizaki S

Subjects
Adult, Aged, Aged, 80 and over, Dissection adverse effects, Feasibility Studies, Female, Gastrointestinal Neoplasms pathology, Humans, Hypnotics and Sedatives therapeutic use, Japan, Male, Middle Aged, Patient Selection, Postoperative Complications etiology, Postoperative Complications therapy, Propofol therapeutic use, Risk Assessment, Risk Factors, Treatment Outcome, Ambulatory Care Facilities, Dissection methods, Endoscopy, Gastrointestinal adverse effects, Gastrointestinal Neoplasms surgery
Abstract

Aim: To investigate whether endoscopic submucosal dissection (ESD) can be safely performed at small clinics, such as the Shirakawa Clinic., Methods: One thousand forty-seven ESDs to treat gastrointestinal tumors were performed at the Shirakawa Clinic from April 2006 to March 2011. The efficacy, technical feasibility and associated complications of the procedures were assessed. The ESD procedures were performed by five endoscopists. Sedation was induced with propofol for esophagogastorduodenal ESD., Results: One thousand forty-seven ESDs were performed to treat 64 patients with esophageal cancer (E), 850 patients with gastric tumors (G: 764 patients with cancer, 82 patients with adenomas and four others), four patients with duodenal cancer (D) and 129 patients with colorectal tumors (C: 94 patients with cancer, 21 patients with adenomas and 14 others). The en bloc resection rate was 94.3% (E: 96.9%, G: 95.8%, D: 100%, C: 79.8%). The median operation time was 46 min (range: 4-360 min) and the mean size of the resected specimens was 18 mm (range: 2-150 mm). No mortal complications were observed in association with the ESD procedures. Perforation occurred in 12 cases (1.1%, E: 1 case, G: 9 cases, D: 1 case, C: 1 case) and postoperative bleeding occurred in 53 cases (5.1%, G: 51 cases, D: 1 case, C: 1 case); however, no case required either emergency surgery or blood transfusion. All of the perforations and postperative bleedings were resolved by endoscopic clipping or hemostasis. The other problematic complication observed was pneumonia, which was treated with conservative therapy., Conclusion: ESD can be safely performed in a clinic with established therapeutic methods and medical services to address potential complications.

Published
2013
Full Text
View/download PDF

41. Analysis of colonoscopic perforations at a local clinic and a tertiary hospital.

Author

Sagawa T, Kakizaki S, Iizuka H, Onozato Y, Sohara N, Okamura S, and Mori M

Subjects
Aged, Aged, 80 and over, Female, Humans, Incidence, Intestinal Perforation diagnosis, Intestinal Perforation therapy, Japan epidemiology, Male, Middle Aged, Predictive Value of Tests, Retrospective Studies, Risk Assessment, Risk Factors, Time Factors, Tomography, X-Ray Computed, Treatment Outcome, Ambulatory Care Facilities, Colon injuries, Colonoscopy adverse effects, Iatrogenic Disease, Intestinal Perforation epidemiology, Tertiary Care Centers
Abstract

Aim: To define the clinical characteristics, and to assess the management of colonoscopic complications at a local clinic., Methods: A retrospective review of the medical records was performed for the patients with iatrogenic colon perforations after endoscopy at a local clinic between April 2006 and December 2010. Data obtained from a tertiary hospital in the same region were also analyzed. The underlying conditions, clinical presentations, perforation locations, treatment types (operative or conservative) and outcome data for patients at the local clinic and the tertiary hospital were compared., Results: A total of 10  826 colonoscopies, and 2625 therapeutic procedures were performed at a local clinic and 32  148 colonoscopies, and 7787 therapeutic procedures were performed at the tertiary hospital. The clinic had no perforations during diagnostic colonoscopy and 8 (0.3%) perforations were determined to be related to therapeutic procedures. The perforation rates in each therapeutic procedure were 0.06% (1/1609) in polypectomy, 0.2% (2/885) in endoscopic mucosal resection (EMR), and 3.8% (5/131) in endoscopic submucosal dissection (ESD). Perforation rates for ESD were significantly higher than those for polypectomy or EMR (P < 0.01). All of these patients were treated conservatively. On the other hand, three (0.01%) perforation cases were observed among the 24  361 diagnostic procedures performed, and these cases were treated with surgery in a tertiary hospital. Six perforations occurred with therapeutic endoscopy (perforation rate, 0.08%; 1 per 1298 procedures). Perforation rates for specific procedure types were 0.02% (1 per 5500) for polypectomy, 0.17% (1 per 561) for EMR, 2.3% (1 per 43) for ESD in the tertiary hospital. There were no differences in the perforation rates for each therapeutic procedure between the clinic and the tertiary hospital. The incidence of iatrogenic perforation requiring surgical treatment was quite low in both the clinic and the tertiary hospital. No procedure-related mortalities occurred. Performing closure with endoscopic clipping reduced the C-reactive protein (CRP) titers. The mean maximum CRP titer was 2.9 ± 1.6 mg/dL with clipping and 9.7 ± 6.2 mg/dL without clipping, respectively (P < 0.05). An operation is indicated in the presence of a large perforation, and in the setting of generalized peritonitis or ongoing sepsis. Although we did not experience such case in the clinic, patients with large perforations should be immediately transferred to a tertiary hospital. Good relationships between local clinics and nearby tertiary hospitals should therefore be maintained., Conclusion: It was therefore found to be possible to perform endoscopic treatment at a local clinic when sufficient back up was available at a nearby tertiary hospital.

Published
2012
Full Text
View/download PDF

42. Analysis of ABC (D) stratification for screening patients with gastric cancer.

Author

Kudo T, Kakizaki S, Sohara N, Onozato Y, Okamura S, Inui Y, and Mori M

Subjects
Adult, Aged, Aged, 80 and over, Biomarkers blood, Female, Helicobacter Infections immunology, Helicobacter pylori immunology, Humans, Male, Middle Aged, Stomach Neoplasms blood, Stomach Neoplasms diagnosis, Antibodies, Bacterial blood, Early Detection of Cancer methods, Helicobacter Infections blood, Pepsinogen A blood, Pepsinogen C blood, Stomach Neoplasms classification, Stomach Neoplasms pathology
Abstract

Aim: To evaluate the value of ABC (D) stratification [combination of serum pepsinogen and Helicobacter pylori (H. pylori) antibody] of patients with gastric cancer., Methods: Ninety-five consecutive patients with gastric cancer were enrolled into the study. The serum pepsinogen I (PG I)/pepsinogen II (PG II) and H. pylori antibody levels were measured. Patients were classified into five groups of ABC (D) stratification according to their serological status. Endoscopic findings of atrophic gastritis and histological differentiation were also analyzed in relation to the ABC (D) stratification., Results: The mean patient age was (67.9 ± 8.9) years. Three patients (3.2%) were classified into group A, 7 patients (7.4%) into group A', 27 patients (28.4%) into group B, 54 patients (56.8%) into group C, and 4 patients (4.2%) into group D, respectively. There were only three cases in group A when the patients taking acid proton pump inhibitors and those who had undergone eradication therapy for H. pylori (group A') were excluded. These three cases had mucosal atrophy in the grey zone according to the diagnostic manual of ABC (D) stratification. Histologically, the mean age of the patients with well differentiated adenocarcinoma was significantly higher than that of the patients with poorly differentiated adenocarcinoma (P < 0.05). There were no differences in the pattern of atrophy in the endoscopies between the well differentiated and poorly differentiated groups., Conclusion: ABC (D) stratification is a good method for screening patients with gastric cancers. Endoscopy is needed for grey zone cases to check the extent of mucosal atrophy.

Published
2011
Full Text
View/download PDF

43. Ectopic varices rupture in the gastroduodenal anastomosis successfully treated with N-butyl-2-cyanoacrylate injection.

Author

Onozato Y, Kakizaki S, Iizuka H, Mori K, Takizawa D, Ohyama T, Arakawa K, Arai H, Ishihara H, Abe T, Sohara N, Sato K, Takagi H, and Mori M

Subjects
Aged, Anastomosis, Surgical, Angiography, Duodenum blood supply, Enbucrilate therapeutic use, Gastrectomy, Gastrointestinal Hemorrhage diagnostic imaging, Gastrointestinal Hemorrhage etiology, Humans, Hypertension, Portal complications, Male, Rupture, Varicose Veins diagnostic imaging, Varicose Veins pathology, Enbucrilate analogs & derivatives, Gastrointestinal Hemorrhage surgery, Tissue Adhesives therapeutic use, Varicose Veins drug therapy
Abstract

The term "ectopic varices" is used to describe dilated portosystemic collateral veins in unusual locations other than the gastroesophageal region. We recently experienced a rare case of ectopic varices that developed in the gastroduodenal anastomosis after subtotal gastrectomy. A 70-year-old male with liver cirrhosis due to hepatitis C virus infection was admitted for hematemesis and tarry stool. He had received a subtotal gastrectomy with the Billroth-I method for gastric ulcer at 46 years of age. Although emergency endoscopy revealed esophageal and gastric fundal varices, there were no obvious bleeding points. After removal of the coagula, ectopic varices and a fibrin plug were observed on the gastroduodenal anastomosis. During the observation, blood began to spurt from the fibrin plug. N-butyl-2-cyanoacrylate with lipiodol injection succeeded in hemostasis. Splenic angiography showed gastric varices feeding from a short gastric vein and the posterior gastric vein. The blood flow around the bleeding point, as indicated by lipiodol deposition, had decreased, and no feeding vein was observed. Endoscopic and angiographic findings are shown and the treatment for such lesions is discussed.

Published
2007
Full Text
View/download PDF

44. [A survival case of hepatocellular carcinoma with splenic metastasis: metachronous rupture at the liver primary and splenic metastatic lesion].

Author

Sumiya H, Takayama H, Arai H, Mori K, Iizuka H, Sagawa T, Onozato Y, Ishihara H, Ogawa T, and Abe T

Subjects
Aged, Carcinoma, Hepatocellular therapy, Hemostatic Techniques, Humans, Liver Diseases etiology, Liver Diseases therapy, Liver Neoplasms therapy, Lung Neoplasms secondary, Lung Neoplasms surgery, Male, Pneumonectomy, Rupture, Spontaneous, Splenic Neoplasms surgery, Survivors, Carcinoma, Hepatocellular secondary, Embolization, Therapeutic, Liver Neoplasms pathology, Splenic Neoplasms secondary, Splenic Rupture therapy
Abstract

A 78-year-old man was referred to our hospital in March 2003 for rupture of hepatocellular carcinoma (HCC). Hemostasis was obtained by emergency angiography. In December 2004, metastasis to the right lung appeared and right lower lobectomy was carried out. In October 2005, a splenic metastatic lesion ruptured and hemostasis was obtained by emergency partial splenic embolization (PSE). Since viable remnants of the splenic tumor were suspected by CT, splenectomy was subsequently performed. He has been followed up in the outpatient clinic without recurrence. This is a markedly rare case of HCC in which, metachronous rupture primary and metastatic lesions, the patient was saved.

Published
2007

Catalog

Books, media, physical & digital resources
See catalog results