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BACKGROUND/AIMS Stereotactic body radiation therapy (SBRT) for gastrointestinal malignancies requires the placement of fiducials to guide treatment delivery. This study aimed to determine the safety and technical feasibility of endoscopic ultrasonography (EUS)-guided fiducial placement for SBRT. METHODS From November 2010 to August 2012, 32 consecutive(More)
Here, a case of a patient with incidental finding of a carcinoid tumor of the ampulla of Vater, who was treated with endoscopic snare papillectomy, is reported. A 62-year-old male was admitted to our hospital due to a carcinoid tumor of the ampulla of Vater, which was found during follow-up endoscopy after an endoscopic mucosal resection of early gastric(More)
We propose a new broadcast encryption scheme based on the idea of 'one key per each punctured interval'. Let r be the number of revoked users. In our scheme with p-punctured c-intervals, the transmission overhead is roughly r p+1 as r grows. Our scheme is very flexible with two parameters p and c. We may take p as large as possible if a user device allows a(More)
OBJECTIVE Autoimmune pancreatitis (AIP) is a treatable form of chronic pancreatitis that has been increasingly recognised over the last decade. We set out to better understand the current burden of AIP at several academic institutions diagnosed using the International Consensus Diagnostic Criteria, and to describe long-term outcomes, including organs(More)
We develop a couple of new methods to reduce transmission overheads in broadcast encryption. The methods are based on the idea of assigning one key per each partition using one-way key chains after partitioning the users. One method adopts <i>skipping</i> <i>chains</i> on partitions containing up to <i>p</i> revoked users and the other adopts <i>cascade</i>(More)
Pain caused by chronic pancreatitis is medically intractable and resistant to conventional interventional or surgical treatment. We report a case of spinal cord stimulation (SCS) for intractable pain due to chronic pancreatitis. The patient had a history of nonalcoholic chronic pancreatitis and multiple emergency room visits as well as repeated(More)
Because acute cholangitis sometimes rapidly progresses to a severe form accompanied by organ dysfunction, caused by the systemic inflammatory response syndrome (SIRS) and/or sepsis, prompt diagnosis and severity assessment are necessary for appropriate management, including intensive care with organ support and urgent biliary drainage in addition to medical(More)
Small pancreatic cancers (longest diameter </=2 cm) have been regarded as preliminary to early pancreatic cancer, which was thought to be highly curable. During our experience since 1989, we evaluated 542 cases of pancreatic cancer. Among them we found 74 cases of tumors </=2 cm in diameter, small pancreatic cancer (TS1 pancreatic cancer).(More)
BACKGROUND/AIMS We aimed to evaluate survival time and prognostic factors in patients with advanced unresectable cholangiocarcinoma who have not received surgery, chemotherapy, or radiotherapy. METHODS A total of 1,377 patients, who were diagnosed with primary cholangiocarcinoma between 1996 and 2002, were reviewed retrospectively according to the(More)