Stomach and Intestine(Tokyo) Volume 52, Issue 9 (August 2017)

Early Rectal Cancer with Atypical Endoscopic Findings, Report of a Case Hiro-o Matsushita 1 , Makoto Eizuka 2 , Yoshihito Tanaka 1 , Hiro-o Yamano 1 , Kenjiro Yoshikawa 1 , Ryo Takagi 1 , Eiji Harada 1 , Michiko Nakaoka 1 , Yuko Yoshida 1 , Kazunori Tuda 1 , Bunichiro Kato 1 , Yasushi Imai 1 , Noriyuki Uesugi 2 , Tamotu Sugai 2 1Digestive Disease Center, Akita Red Cross Hospital, Akita, Japan 2Department of Molecular Diagnostic Pathology, Iwate Medical University School of Medicine, Morioka, Japan Keyword: 大腸腫瘍性病変 , 早期大腸癌 , 拡大内視鏡診断 pp.1227-1236
Published Date 2017/8/25
  • Abstract
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 A 60-year-old male underwent colonoscopy because of a positive fecal occult-blood test. A reddish Ip lesion with a diameter of approximately 20mm and two compartments on the surface was observed in the rectosigmoid. Magnified endoscopic view showed atypical surface structures in both compartments.

 Although the lesion was considered to be epithelial, a definitive diagnosis pertaining to the cancerous nature of the lesion was difficult. Therefore, an endoscopic mucosal resection was performed.

 Pathological diagnosis confirmed a well-to-moderately differentiated adenocarcinoma with the following characteristics:(tub1,2) ; depth, m(pTis) ; ly0 ; v0 ; pHM0 ; and pVM0. The adenocarcinoma was also revealed to be tubular with low-grade dysplasia.

 Endoscopic findings showed that the lesion was different from conventional tubular adenomas and early cancers ; therefore, it was considered to be of interest.

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52巻9号 (2017年8月)
電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院