Toshiki Sugawara

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OBJECTIVE This study was performed to determine and compare the effectiveness and incidence of complications of percutaneous cholecystostomy and gallbladder aspiration in cases of severe acute cholecystitis. SUBJECTS AND METHODS. Fifty-eight patients with severe acute cholecystitis who did not improve after antibiotic treatment were included in this study.(More)
The diagnostic efficacy of endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) cytology may vary greatly depending on the treatment of the samples obtained and the level of proficiency of the cytopathologist or cytoscreener. We prospectively evaluated the diagnostic efficacy of the cell block (CB) method and that of smear cytology using tissue(More)
OBJECTIVE The indications for endoscopic treatment in early stage cancer of the digestive tract are expanding with the emergence and technical development of endoscopic submucosal dissection (ESD). ESD requires longer term stable sedation than conventional endoscopic procedures due to the necessity of meticulous control of the devices during the procedure.(More)
We investigated the presence of occult pancreaticobiliary reflux in patients with a morphologically normal pancreaticobiliary ductal arrangement by measuring biliary amylase levels and compared histopathological findings of the gallbladder between groups with high and low biliary amylase levels. In 178 patients with a normal pancreaticobiliary ductal(More)
BACKGROUND Clinical demand for total colonoscopy (TCS) is increasing. Improvement of the cecal intubation rate and shortening of the examination time would expand the capacity for TCS. OBJECTIVE To assess the efficacy of a transparent hood attached to the tip of a colonoscope for cecal intubation in TCS. DESIGN Prospective, randomized, controlled study.(More)
Although many cases of solid cystic tumor of the pancreas (SCT) have been reported, its nature and histogenesis remain controversial. We herein report six cases of SCT, including three cases of noncystic type. A review of 22 cases of noncystic type SCT, including our 3 cases, was carried out to compare their features with those of 173 cases of classic SCT(More)
To prospectively evaluate the role of contrast-enhanced computed tomography (CE-CT) in the detection of colonic diverticular bleeding (CDB). Consecutive patients who presented with hematochezia and were clinically suspected of CDB were prospectively enrolled. Those who could undergo both CE-CT and total colonoscopy, and who were finally diagnosed as CDB,(More)
We histologically evaluated the epithelia of the gallbladder (GB) and bile duct (BD) in patients with anomalous arrangement of the pancreaticobiliary ductal system (AAPB), with regard to the shape of the common BD (CBD). The GB and BD were studied histologically using surgical materials from 44 patients with AAPB: 27 with a dilated CBD (D-type) and 17 with(More)
The aim of this study was to evaluate histopathologically the frequency, direction, and length of intraductal spread (IS) along the main pancreatic duct from the main tumor of small pancreatic cancer. Resected specimens from 20 cases of pTS1 (histologically 2 cm or less in diameter) pancreatic cancer (September 1983 to December 2005) were examined(More)
AIMS To assess the prevalence and clinical significance of mediastinal emphysema (ME) after esophageal endoscopic submucosal dissection (ESD). METHODS A total of 105 patients in whom assessment of ME was prospectively carried out with multi-detector row computed tomography (MDCT) after esophageal ESD were included in this study. ME was graded as follows:(More)