A case of a local recurrence of adenocarcinoma of the rectum in 1 year after endoscopic polypectomy

A 78-year-old male underwent polypectomy due to a IIa lesion (10 mm in diameter) in the lower rectum at another hospital. Histopathological examination showed adenocarcinoma with adenoma, 8 mm, tub1, T1b (SM, 1,500 am) , ly1, v0, budding grade 1, HM0, VM0. He was referred to our hospital for additional surgery. However, he did not wish to undergo radical surgery. After about 1 year, bleeding on defecation occurred, and endoscopy was performed. There was a recurrent lesion (15 mm in diameter, Is) at the previous resection site. He did not wish to undergo surgery including bowel resection. Therefore, transanal minimally invasive surgery (TAMIS) was performed for tumor resection. Histopathological examination showed well-moderate differentiated adenocarcinoma, Rb, 0-Is, 18×16 mm, pT1b (SM 5,000 µm) , int, INFb, ly0, v2, budding grade 1, pHM0, pVM0. In consideration of recurrence after TAMIS, careful observation is required.