Publications by authors named "Y Kushiyama"

Article Synopsis
  • - A man in his 30s was referred for evaluation of bile duct stricture and an intrahepatic bile duct stone, five years after having surgery for a massive liver tumor (hemangioma).
  • - Imaging tests showed multiple defects in his bile duct, and an endoscopic ultrasound revealed a raised lesion, leading to concerns about a potential tumor.
  • - A diagnosis of intraductal papillary neoplasm (low-grade dysplasia) was confirmed through oral cholangioscopy, which showed no progression of the lesion over 1.5 years.
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Article Synopsis
  • The study investigates the risk factors for severe-to-fatal post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP) in 3739 ERCP patients with biliary disease over a one-year period.
  • Key risk factors identified include pancreatic guidewire-assisted biliary cannulation, post-ERCP NSAID use, and a history of previous pancreatitis, all significantly increasing the likelihood of severe-to-fatal PEP.
  • Preventive measures that showed effectiveness include endoscopic biliary sphincterotomy and prophylactic pancreatic stents, both of which significantly reduced the risk of severe-to-fatal PEP.
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Protruded signet-ring cell carcinoma (SRCC) is extremely rare. We herein report a rare case of flat elevated gastric SRCC in a patient without Helicobacter pylori infection. Esophagogastroduodenoscopy of a woman in her 50s revealed a flat, whitish lesion in the gastric body with elevation.

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Gastroduodenal peptic ulcers are the main cause of nonvariceal upper gastrointestinal bleeding (UGIB). We believe that recent advances in endoscopic techniques and devices for diagnosing upper gastrointestinal tract tumors have advanced hemostasis for UGIB. However, few prospective multicenter studies have examined how these changes affect the prognosis.

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The 5-year survival rate for pancreatic cancer has improved (10%) but remains worse than that for other cancers. Early pancreatic cancer diagnosis is challenging, and delayed diagnosis can delay treatment, which impairs survival. Practitioners do not promptly refer cases to a general hospital, causing delayed discovery.

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