Publications by authors named "Hisashi Doyama"

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Intensive endoscopic resection for downstaging of polyp burden in patients with familial adenomatous polyposis (J-FAPP Study III): a multicenter prospective interventional study.
Hideki Ishikawa, Masayoshi Yamada, Yasushi Sato, Shinji Tanaka, Chino Akiko, Masahiro Tajika, Hisashi Doyama, Tetsuji Takayama, Yoshio Ohda, Takahiro Horimatsu

Endoscopy· April 2023

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Successful intubation of the periampullary diverticulum in post-Billroth II method-reconstructed intestinal tract using clip-and-snare method with a pre-looping technique.
Makoto Yamamoto, Kunihiro Tsuji, Shigetsugu Tsuji, Shigenori Wakita, Hiroyoshi Nakanishi, Hisashi Doyama

Clin Endosc· November 2025

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Endoscopic balloon dilation with steroid injection versus radial incision and cutting with steroid injection for refractory esophageal anastomotic stricture: a randomized study.
Ikuo Aoyama, Kohei Takizawa, Kozo Kataoka, Gakuto Ogawa, Yusuke Sano, Hisashi Doyama

Endoscopy· September 2025

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A prospective, randomized, double-blind, placebo-controlled trial of the Kampo formula daiobotanpito combined with antibiotic therapy for acute diverticulitis.
Keiko Ogawa-Ochiai, Shigetsugu Tsuji, Atsuki Maeda, Hisatomo Ikehara, Kazumi Kawabata, Hisashi Doyama

Sci Rep· July 2025

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Correction: A nonrandomized, single-arm confirmatory trial of expanded endoscopic submucosal dissection indication for undifferentiated early gastric cancer: Japan Clinical Oncology Group study (JCOG1009/1010).
Kohei Takizawa, Hiroyuki Ono, Noriaki Hasuike, Atsuo Takashima, Keiko Minashi, Hisashi Doyama

Gastric Cancer· May 2025

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Outcomes of noncurative endoscopic submucosal dissection for T1 colorectal cancer: Prospective, multicenter, cohort study in Japan.
Shigetsugu Tsuji, Hisashi Doyama, Nozomu Kobayashi, Ken Ohata, Yoji Takeuchi

Dig Endosc· December 2024

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Comparison of Effective Imaging Modalities for Detecting Gastric Neoplasms: A Randomized 3-Arm Phase II Trial.
Tomohiro Kadota, Seiichiro Abe, Noriya Uedo, Hisashi Doyama, Yasuaki Furue

Am J Gastroenterol· October 2024

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Radiation Exposure with Self-Expandable Metallic Stent versus Transanal Decompression Tube for Malignant Colorectal Obstruction: A Post Hoc Propensity Score Matched Analysis.
Yuzuru Tamaru, Toshio Kuwai, Shiro Hayashi, Koji Nagaike, Takayuki Yakushijin, Hisashi Doyama

J Clin Med· October 2024

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E-learning system to improve the endoscopic diagnosis of early gastric cancer.
Kenshi Yao, Takashi Yao, Noriya Uedo, Hisashi Doyama, Hideki Ishikawa

Clin Endosc· May 2024

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Alcohol consumption, multiple Lugol-voiding lesions, and field cancerization.
Chikatoshi Katada, Tetsuji Yokoyama, Tomonori Yano, Haruhisa Suzuki, Yasuaki Furue, Hisashi Doyama

DEN Open· April 2024

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Advanced diagnostic endoscopy in the upper gastrointestinal tract: Review of the Japan Gastroenterological Endoscopic Society core sessions.
Hiroya Ueyama, Toshiaki Hirasawa, Tomonori Yano, Hisashi Doyama, Hajime Isomoto

DEN Open· April 2024

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Results of the interim analysis of a prospective, multicenter, observational study of small subepithelial lesions in the stomach.
Masaya Iwamuro, Toshiharu Mitsuhashi, Tomoki Inaba, Kazuhiro Matsueda, Teruya Nagahara, Hisashi Doyama

Dig Endosc· March 2024

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Efficacy of endoscopic submucosal resection with a ligation device for small rectal neuroendocrine tumor: study protocol of a multicenter open-label randomized control trial (BANDIT trial).
Kazunori Takada, Kenichiro Imai, Takanori Yamada, Ken Ohata, Takashi Kanesaka, Hisashi Doyama

BMC Gastroenterol· February 2024

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Endoscopic omental packing in combination with the clip-and-snare method using pre-looping technique for gastric perforation.
Naohiro Yoshida, Manami Utsunomiya, Azusa Kawasaki, Hiroyoshi Nakanishi, Shigetsugu Tsuji, Hisashi Doyama

Endoscopy· December 2023

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Metachronous primary gastric cancer after endoscopic resection in patients with esophageal squamous cell carcinoma.
Motohiro Hirao, Chikatoshi Katada, Tetsuji Yokoyama, Tomonori Yano, Haruhisa Suzuki, Hisashi Doyama

Gastric Cancer· November 2023

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Clinical Guidelines for Diagnosis and Management of Cowden Syndrome/PTEN Hamartoma Tumor Syndrome in Children and Adults-Secondary Publication.
Tetsuji Takayama, Naoki Muguruma, Masahiro Igarashi, Shozo Ohsumi, Shiro Oka, Hisashi Doyama

J Anus Rectum Colon· October 2023

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Risk factors for the development of second primary esophageal squamous-cell carcinoma after endoscopic resection for esophageal squamous-cell carcinoma according to genetic polymorphisms related to alcohol and nicotine metabolism.
Chikatoshi Katada, Tetsuji Yokoyama, Kanae Mure, Hisashi Doyama, Hiroyoshi Nakanishi

Jpn J Clin Oncol· August 2023

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Radiation dose and factors related to exceeding the diagnostic reference level in 496 transnasal ileus tube placement procedures from the REX-GI study.
Koji Nagaike, Shiro Hayashi, Takayuki Yakushijin, Masashi Yamamoto, Tetsuya Sumiyoshi, Hisashi Doyama

Br J Radiol· June 2023

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Usefulness of third-generation narrow band imaging and texture and color enhancement imaging in improving visibility of superficial early gastric cancer: A study using color difference.
Azusa Kawasaki, Naohiro Yoshida, Hiroyoshi Nakanishi, Shigetsugu Tsuji, Kenichi Takemura, Hisashi Doyama

DEN Open· April 2023

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A follow-up questionnaire survey 2022 on radiation protection among 464 medical staff from 34 endoscopy-fluoroscopy departments in Japan.
Shiro Hayashi, Mamoru Takenaka, Hirofumi Kogure, Takayuki Yakushijin, Yousuke Nakai, Hisashi Doyama

DEN Open· April 2023

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Non-atrophic gastric mucosa is an independently associated factor for superficial non-ampullary duodenal epithelial tumors: a multicenter, matched, case-control study.
Azusa Kawasaki, Kunihiro Tsuji, Noriya Uedo, Takashi Kanesaka, Hideaki Miyamoto, Hisashi Doyama

Clin Endosc· January 2023

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Resection depth and layer of underwater versus conventional endoscopic mucosal resection of intermediate-sized colorectal polyps: A pilot study.
Hiroki Nomura, Shigetsugu Tsuji, Manami Utsunomiya, Azusa Kawasaki, Kunihiro Tsuji, Hisashi Doyama

Endosc Int Open· August 2022

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Assessment of Outcomes From 1-Year Surveillance After Detection of Early Gastric Cancer Among Patients at High Risk in Japan.
Yoshinobu Yamamoto, Naohiro Yoshida, Tomonori Yano, Takahiro Horimatsu, Noriya Uedo, Hisashi Doyama

JAMA Netw Open· August 2022

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Reply to Lv and Yang.
Motohiko Kato, Yoji Takeuchi, Shu Hoteya, Tsuneo Oyama, Satoru Nonaka, Hisashi Doyama

Endoscopy· May 2022

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Diagnosis of histological type of early gastric cancer by magnifying narrow-band imaging: A multicenter prospective study.
Takashi Kanesaka, Noriya Uedo, Hisashi Doyama, Naohiro Yoshida, Takashi Nagahama

DEN Open· April 2022

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