Publications by authors named "S Umezawa"

A questionnaire survey was designed and performed to assess the current status of "next generation" hepatobiliary and pancreatic (HBP) surgeons regarding surgical training, career, recruiting, and work-life balance in Japan. Using a valid email address, a questionnaire was sent to members of the Japanese Society of Hepato-Biliary-Pancreatic Surgeons (JSHBPS) who were under 45 years old. The questionnaire comprised 50 questions across the following four sections: (i) board certification of JSHBPS, (ii) research activity and overseas study, (iii) recruiting, and (iv) work-life balance.

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Article Synopsis
  • - The study aimed to identify causes of benign hepaticojejunostomy strictures (BHSs) after pancreaticoduodenectomy and evaluate the effectiveness of endoscopic retrograde cholangiography (ERC) for treating these strictures.
  • - Out of 175 patients who underwent the surgery, 13 developed BHSs, with key risk factors being male sex and a preoperative bile duct diameter of less than 8.8 mm.
  • - Treatments using ERC were highly successful, with a 92.3% success rate and no recurrence of strictures after treatment in the follow-up period.
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Objectives: In myelin oligodendrocyte glycoprotein IgG-associated disease (MOGAD) and aquaporin-4 IgG+ neuromyelitis optica spectrum disorder (AQP4+NMOSD), the autoantibodies are mainly composed of IgG1, and complement-dependent cytotoxicity is a primary pathomechanism in AQP4+NMOSD. We aimed to evaluate the CSF complement activation in MOGAD.

Methods: CSF-C3a, CSF-C4a, CSF-C5a, and CSF-C5b-9 levels during the acute phase before treatment in patients with MOGAD (n = 12), AQP4+NMOSD (n = 11), multiple sclerosis (MS) (n = 5), and noninflammatory neurologic disease (n = 2) were measured.

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Objective: To investigate the influence of endoscopic gallbladder stenting (EGBS) on subsequent cholecystectomy. We retrospectively compared the surgical outcomes of EGBS, followed by elective cholecystectomy with those of immediate cholecystectomy (IC).

Patients And Methods: A total of 503 patients were included in this study.

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The right top pulmonary vein (RTPV), a rare pulmonary vein (PV) variant draining the right upper lobe, arises independently from the right superior PV, travels posterior to the right bronchial tree and drains directly into the left atrium (LA) or another PV. We report an RTPV discovered on preoperative computed tomography (CT) scanning in a 60-y-old man who subsequently underwent prone thoracoscopic esophagectomy and subcarinal lymph node dissection. The preoperative CT scan showed an anomalous vessel 7.

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