Yohei Koyama

Predictive Factors of Postendoscopic Submucosal Dissection Electrocoagulation Syndrome and the Utility of Computed Tomography Scan after Esophageal Endoscopic Submucosal Dissection

Hayato Yamaguchi, Masakatsu Fukuzawa, Takashi Kawai et al. · Digestion · 2019 · 27 citations

Efficacy of high-vision transnasal endoscopy using texture and colour enhancement imaging and narrow-band imaging to evaluate gastritis: a randomized controlled trial

Mitsushige Sugimoto, Yusuke Kawai, Yuko Morino et al. · Annals of Medicine · 2022 · 27 citations · Full text

Underwater endoscopic submucosal dissection for colorectal tumors decreases the incidence of post‐electrocoagulation syndrome

Yohei Koyama, Masakatsu Fukuzawa, Hiroyuki Aikawa et al. · Journal of Gastroenterology and Hepatology · 2023 · 27 citations · Full text

Visibility of early gastric cancers by texture and color enhancement imaging using a high-definition ultrathin transnasal endoscope

Yohei Koyama, Mitsushige Sugimoto, Takashi Kawai et al. · Scientific Reports · 2023 · 20 citations · Full text

New scoring system to distinguish deep invasive submucosal and muscularis propria colorectal cancer during colonoscopy: a development and global multicenter external validation study (e-T2 Score)

Yohei Koyama, Masayoshi Yamada, Mai Ego et al. · Gastrointestinal Endoscopy · 2022 · 15 citations

Cancer Detection, Medicine, E-t2 Score +10