Kentaro Yamao

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Endoscopic ultrasonography (EUS) is widely used to evaluate pancreaticobiliary diseases, especially pancreatic masses. EUS has a good ability to detect pancreatic masses, but it is not sufficient for the differential diagnosis of various types of lesions. In order to address the limitations of EUS, new techniques have been developed to improve the(More)
BACKGROUND AND AIMS EUS-guided bile duct drainage (EUS-BD) is a well-recognized rescue biliary drainage method after unsuccessful ERCP. EUS-guided gallbladder drainage (EUS-GBD) was recently used to treat acute cholecystitis. The aim of this study was to assess the efficacy and safety of EUS-GBD for malignant biliary stricture-induced obstructive jaundice(More)
Acute obstructive suppurative cholangitis (AOSC) due to biliary lithiasis is a life-threatening condition that requires urgent biliary decompression. Although endoscopic retrograde cholangiopancreatography (ERCP) with stent placement is the current gold standard for biliary decompression, it can sometimes be difficult because of failed biliary cannulation.(More)
Metastasis of ovarian carcinoma to the stomach [1–5] or pancreas [6,7] is uncommon. Furthermore, synchronous metastasis of ovarian adenocarcinoma to the stomach and pancreas has never been reported. We report here the detection of synchronous metastasis to both the stomach and pancreas from a resected ovarian papillary serous cystadenocarcinoma. At 25(More)
A 40-year-old man was referred to our hospital because of a positive fecal occult blood test. Colonoscopy revealed many small whitish nodules in the mucosa of the sigmoid colon. Specimens endoscopically resected from the lesions revealed spindle cell proliferation in the lamina propria. Immunohistochemical study revealed strong and diffuse positivity for(More)
Endoscopic ultrasonography-guided hepaticogastrostomy (EUS-HGS) has recently been developed as an alternative biliary drainage technique for failed endoscopic retrograde cholangiopancreatography (ERCP) [1–3]. A recent review revealed its overall technical success rate to be82% [4], but puncturing the left intrahepatic bile duct (LIBD) is occasionally(More)
BACKGROUND AND STUDY AIM Comparison of fundamental B-mode endoscopic ultrasonography (FB-EUS) and contrast-enhanced harmonic endoscopic ultrasonography (CH-EUS) in the differential diagnosis of pancreatic cysts according to presence of mural nodules. PATIENTS AND METHODS Between April 2007 and April 2012, FB-EUS and CH-EUS data were prospectively(More)
Treatment of unresectable malignant hilar biliary stricture (UMHBS) is challenging, especially after failure of repeated transpapillary endoscopic stenting. Endoscopic ultrasonography-guided intrahepatic biliary drainage (EUS-IBD) is a recent technique for intrahepatic biliary decompression, but indications for its use for complex hilar strictures have not(More)
BACKGROUND AND AIMS EUS-guided FNA (EUS-FNA) is used for the diagnosis of pancreatic adenocarcinoma, but sometimes the method results in a false negative. Occasionally, an avascular area may be observed within the pancreatic adenocarcinoma tumor during contrast-enhanced harmonic EUS (CH-EUS). The aim of this study was to evaluate whether the diagnostic(More)
AIM To assess anti-migration potential of six biliary covered self-expandable metal stents (C-SEMSs) by using a newly designed phantom model. METHODS In the phantom model, the stent was placed in differently sized holes in a silicone wall and retracted with a retraction robot. Resistance force to migration (RFM) was measured by a force gauge on the stent(More)