title: Recurrence after curative surgical resection of T1 rectal cancer: a report of two cases.
abstract: Recent advances in endoscopic diagnosis and treatment techniques have led to a marked increase in the detection and endoscopic treatment of early colorectal cancers (CRC). According to the Japanese Society for Cancer of the Colon and Rectum (JSCCR) guidelines, T1-CRC with a negative vertical margin, well- or moderately differentiated adenocarcinoma, no evidence of vascular or lymphatic invasion, and depth of invasion <1000 μm are considered to have a low risk of lymph node metastasis. However, T1-CRC with any of these risk factors are considered to have a high risk of lymph node metastasis. T1-CRC is considered to have a good prognosis if additional surgery is carried out. We experienced two cases of recurrence despite curative surgical resection of T1 rectal cancer.
authors.affiliation: Division of Endoscopy, Shizuoka Cancer Center, Shizuoka, Japan. y.yamaguchi@scchr.jp
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Yamaguchi
authors.forename: Kinichi
authors.initials: K
authors.lastname: Hotta
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Imai
authors.forename: Naomi
authors.initials: N
authors.lastname: Kakushma
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ono
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis / Q000601:surgery*; D000368:Aged; D001706:Biopsy; D003082:Colectomy / Q000379:methods*; D003113:Colonoscopy / Q000379:methods*; D003937:Diagnosis, Differential; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis*; D009367:Neoplasm Staging; D012004:Rectal Neoplasms / Q000175:diagnosis / Q000601:surgery*; D014057:Tomography, X-Ray Computed