Kazuhisa Okamoto

Efficacy of Endoscopic Ultrasound‐guided Transluminal Drainage Using Lumen‐apposing Metal Stents for the Treatment of Pancreatic Fluid Collections

Keisuke Kinoshita, Kazuhisa Okamoto, Satoshi Fukuchi, Hidetoshi Akiyama et autres

Objectives: Pancreatic fluid collections (PFCs) are able to develop secondary to either fluid leakage or liquefaction of acute pancreatitis, chronic pancreatitis, pancreatic trauma, or after pancreatic surgery. While most PFCs resolve spontaneously, endoscopic procedures are sometimes necessary. Endoscopic ultrasound-guided transluminal drainage (EUS-TD) …

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A Case of Obstructive Jaundice due to Bile Duct Tumor Thrombus of Hepatocellular Carcinoma Diagnosed by Peroral Cholangioscopy

Keisuke Kinoshita, Mizuki Endo, Tomoko Tokumaru, Tomoko Saito et autres

While hepatocellular carcinoma (HCC) often invades the portal or hepatic vein to form tumor thrombus, tumor thrombus in the bile duct is rare. In such cases, differentiation from intrahepatic cholangiocarcinoma is difficult, and the tumor often appears as a smooth, yellowish-white, polypoid …

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Nationwide epidemiological survey of acute pancreatitis in Japan, 2021: the impact of the COVID-19 pandemic and revised clinical guidelines

Yuichi Tanaka, Atsushi Masamune, Ryotaro Matsumoto, Tetsuya Takikawa et autres

OBJECTIVES: This study aimed to clarify the current clinico-epidemiological characteristics of acute pancreatitis (AP) in Japan. METHODS: We conducted a two-stage nationwide survey of patients with AP treated at selected hospitals in 2021, during the COVID-19 pandemic. The first stage estimated the …

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Dose Reduction Effects of Face Masks against Radon Progeny Inhalation (2): Changes in Aerosol-attached Radon Progeny Concentrations before and after Passing through Face Masks and Resulting Dose Reduction Effects

Kazuhisa Okamoto, Tetsuo Ishikawa

In a previous report of the authors, changes in aerosol number concentrations before and after passing through four types of masks (non-woven masks, N-95 masks, urethane masks, and gauze masks) were investigated. In the present study, reduction rates of aerosol-attached radon progeny …

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Japanese nationwide prospective observational study on early pancreatic cancer screening in outpatients using a comprehensive scoring system and comparison with Western screening methods (EPSS-1)

Ryota Sagami, Kentaro Yamao, Akinori Shimizu, Hidefumi Nishikiori et autres

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Dose Reduction Effects of Face Masks against Radon Progeny Inhalation (1):

Kazuhisa Okamoto, Tetsuo Ishikawa

The present study aimed at estimating dose reduction effects of face masks against radon progeny inhalation. As the first step, changes in aerosol number concentrations before and after passing through masks were investigated. Four types of masks were used for the experiment: …

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Pancreatic volume change using three dimensional-computed tomography volumetry and its relationships with diabetes on long-term follow-up in autoimmune pancreatitis

Ryuichi Shimada, Yasunari Yamada, Kazuhisa Okamoto, Kazunari Murakami et autres

BACKGROUND Several studies found that early pancreatic atrophy detected by computed tomography (CT) within 6 months was associated with a high incidence of diabetes in patients with type-1 autoimmune pancreatitis (AIP) receiving steroid therapy; however, no long-term follow-up studies have been performed. …

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Feasibility and safety of EUS-guided biliary drainage in inexperienced centers: a multicenter study in southwest Japan

Takehiko Koga, Yusuke Ishida, Shunpei Hashigo, Yuzo Shimokawa et autres

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Tocilizumab-induced mucosal injury in the terminal ileum mimicking intestinal Behçet’s disease: A case report

Sotaro Ozaka, Masahide Fukuda, Haruhiko Takahashi, Koshiro Tsutsumi et autres

RATIONALE: Tocilizumab, a humanized anti-interleukin-6 (IL-6) receptor monoclonal antibody, is used for the treatment of adult-onset Still disease (AOSD). Despite its efficacy in many clinical situations, concerns have been raised regarding intestinal mucosal injury in patients receiving tocilizumab. PATIENT CONCERNS: A 64-year-old …

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Mo1142 MACHINE LEARNING-BASED MODEL FOR PREDICTION AND FEATURE ANALYSIS OF RECURRENCE IN PANCREATIC NEUROENDOCRINE TUMORS G1/G2

Masatoshi Murakami, Nao Fujimori, Kohei Nakata, Masafumi Nakamura et autres

Machine learning-based model for prediction and feature analysis of recurrence in pancreatic neuroendocrine tumors G1/G2

Masatoshi Murakami, Nao Fujimori, Kohei Nakata, Masafumi Nakamura et autres

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Differences in clinical features and morphology between differentiated and undifferentiated gastric cancer after Helicobacter pylori eradication

Masaaki Kodama, Kazuhiro Mizukami, Yuka Hirashita, Tadayoshi Okimoto et autres

BACKGROUND/AIMS: Although undifferentiated gastric cancer (UGC) diagnosed after Helicobacter pylori eradication (HPE) carries a poor prognosis, characteristics of post-HPE UGC have not been evaluated in detail because of its low incidence. Therefore, we compared the clinicopathologic characteristics of UGC and differentiated gastric …

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