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Dive into the research topics where Naoki Sasahira is active.

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Featured researches published by Naoki Sasahira.


Japanese Journal of Clinical Oncology | 2015

Severe ischemic colitis after treatment of bile-duct cancer using gemcitabine and cisplatin

Hiroki Osumi; Masato Ozaka; Hiroshi Ishii; Naoki Sasahira

A 71-year-old male who had a bile-duct cancer with liver metastases underwent systemic chemotherapy with cisplatin (25 mg/m) followed by gemcitabine (GC) (1000 mg/m). Two days after the first administration, he complained of ‘crampy’ abdominal pain. White blood cell count and levels of C-reactive protein and liver enzymes were elevated but those of creatine phosphokinase and lactate Figure 1. Japanese Journal of Clinical Oncology, 2015, 45(4) 402–403 doi: 10.1093/jjco/hyv038 Image of the Month


Archive | 2019

ERCP with Device-Assisted Enteroscopy in Patients with Altered Gastrointestinal Anatomy

Takashi Sasaki; Naoki Sasahira

Diagnosis and treatment using ERCP in patients with altered gastrointestinal anatomy have progressed greatly since the emergence of the double-balloon enteroscope in 2001. The balloon-assisted enteroscope has improved steadily over time, and a short-type balloon-assisted enteroscope with a large working channel became commercially available in 2016. These short-type balloon-assisted enteroscopes accommodate most ERCP accessories, and many kinds of ERCP intervention can be performed, such as conventional ERCP for patients with normal anatomy. Although the success rate of ERCP with balloon-assisted enteroscopy in patients with altered gastrointestinal anatomy has increased to approximately 68–98%, it is still a challenging procedure for many endoscopists. Because ERCP with a balloon-assisted enteroscope is time-consuming, mandates specialized training, and requires special endoscopes and accessories, these factors limit the widespread availability outside tertiary endoscopic referral centers. Other types of device-assisted enteroscopies, including spiral enteroscopy and through-the-scope balloon-assisted enteroscopy, have also been developed to make it easier to perform ERCP in patients with altered gastrointestinal anatomy. These novel device-assisted enteroscopy instruments are still immature compared with balloon-assisted enteroscopy for ERCP in patients with altered gastrointestinal anatomy. Therefore, both device-assisted enteroscopy and ERCP accessories must be improved for this challenging procedure to become a more general procedure.


Journal of Gastroenterology and Hepatology | 2018

Multicenter study of endoscopic preoperative biliary drainage for malignant hilar biliary obstruction: E-POD hilar study: Preoperative hilar biliary drainage

Yousuke Nakai; Ryuichi Yamamoto; Masato Matsuyama; Yuji Sakai; Yukiko Takayama; Jun Ushio; Yukiko Ito; Katsuya Kitamura; Shomei Ryozawa; Tsunao Imamura; Kouhei Tsuchida; Jo Hayama; Takao Itoi; Yoshiaki Kawaguchi; Yu Yoshida; Kazuya Sugimori; Kenji Shimura; Masafumi Mizuide; Tomohisa Iwai; Ko Nishikawa; Hiroshi Yagioka; Masatsugu Nagahama; Nobuo Toda; Tomotaka Saito; Ichiro Yasuda; Kenji Hirano; Osamu Togawa; Kenji Nakamura; Iruru Maetani; Naoki Sasahira

Endoscopic nasobiliary drainage (ENBD) is often recommended in preoperative biliary drainage (PBD) for hilar malignant biliary obstruction (MBO), but endoscopic biliary stent (EBS) is also used in the clinical practice. We conducted this large‐scale multicenter study to compare ENBD and EBS in this setting.


Journal of Clinical Oncology | 2017

TAS-118 (S-1 plus leucovorin) versus S-1 in gemcitabine-refractory advanced pancreatic cancer: A randomized, open-label, phase III trial (GRAPE trial).

Makoto Ueno; Tatsuya Ioka; Hideki Ueno; Joon Oh Park; Heung-Moon Chang; Naoki Sasahira; Masashi Kanai; Ik-Joo Chung; Masafumi Ikeda; Shoji Nakamori; Nobumasa Mizuno; Yasushi Omuro; Taketo Yamaguchi; Hiroki Hara; Kazuya Sugimori; Junji Furuse; Masahiro Takeuchi; Takuji Okusaka; Narikazu Boku; Ichinosuke Hyodo


Annals of Oncology | 2018

P2-100Clinical features of skeletal metastases originated from advanced pancreatic cancer

Yuta Ushida; Masato Osaka; Ikuhiro Yamada; Takashi Sasaki; Makoto Matsuyama; Koichi Takano; Naoki Sasahira


Archive | 2017

Multicenter study of endoscopic preoperative biliary drainage for malignant hilar biliary obstruction: E-POD Hilar study.

Yousuke Nakai; Ryuichi Yamamoto; Masato Matsuyama; Yuji Sakai; Yukiko Takayama; Jun Ushio; Yukiko Ito; Katsuya Kitamura; Shomei Ryozawa; Tsunao Imamura; Kouhei Tsuchida; Jo Hayama; Takao Itoi; Yoshiaki Kawaguchi; Yu Yoshida; Kazuya Sugimori; Kenji Shimura; Masafumi Mizuide; Tomohisa Iwai; Ko Nishikawa; Hiroshi Yagioka; Masatsugu Nagahama; Nobuo Toda; Tomotaka Saito; Ichiro Yasuda; Kenji Hirano; Osamu Togawa; Kenji Nakamura; Iruru Maetani; Naoki Sasahira


Pancreatology | 2016

Neoadjuvant chemotherapy using gemcitabine and nab-paclitaxel combination therapy for the treatment of borderline resectable pancreatic cancer

Takashi Sasaki; Yosuke Inoue; Ryo Kanata; Kei Saito; Ikuhiro Yamada; Masato Matsuyama; Masato Ozaka; Kouichi Takano; Yoshihiro Mise; Takeaki Ishizawa; Yu Takahashi; Yutaka Takazawa; Akio Saiura; Naoki Sasahira


Archive | 2014

PANCREAS, BILIARY TRACT, AND LIVER Disease-Specific Mortality Among Patients With Intraductal Papillary Mucinous Neoplasm of the Pancreas

Kazumichi Kawakubo; Minoru Tada; Hiroyuki Isayama; Naoki Sasahira; Yousuke Nakai; Naminatsu Takahara; Rie Uchino; Tsuyoshi Hamada; Koji Miyabayashi; Keisuke Yamamoto; Suguru Mizuno; Dai Mohri; Hirofumi Kogure; Takashi Sasaki; Natsuyo Yamamoto; Kenji Hirano; Hideaki Ijichi; Keisuke Tateishi; Kazuhiko Koike


/data/revues/00165107/v67i5/S001651070800802X/ | 2011

Endoscopic Re-Intervention for the Management of Dysfunction of Covered Metallic Stents in Patients with Malignant Distal Biliary Obstructions

Osamu Togawa; Hiroyuki Isayama; Takeshi Tsujino; Yousuke Nakai; Yoko Yashima; Hiroshi Yagioka; Hirofumi Kogure; Takashi Sasaki; Toshihiko Arizumi; Saburo Matsubara; Yukiko Ito; Naoki Sasahira; Kenji Hirano; Nobuo Toda; Minoru Tada; Haruhiko Yoshida; Takao Kawabe; Masao Omata


/data/revues/00165107/v67i5/S0016510708007888/ | 2011

Risk Factors for Recurrence of Common Bile Duct Stone in Patients with the Gallbladder in Situ with Stones After Endoscopic Papillary Balloon Dilation

Toshihiko Arizumi; Takeshi Tsujino; Yoko Yashima; Hiroshi Yagioka; Hirofumi Kogure; Takashi Sasaki; Osamu Togawa; Saburo Matsubara; Yousuke Nakai; Kenji Hirano; Naoki Sasahira; Hiroyuki Isayama; Minoru Tada; Takao Kawabe; Masao Omata

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Yousuke Nakai

University of California

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Kenji Hirano

Memorial Hospital of South Bend

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Osamu Togawa

Saitama Medical University

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Nobuo Toda

Memorial Hospital of South Bend

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