Intussusception due to rectal adenocarcinoma in a young adult:A case report

An intussusception due to colonic adenocarcinoma has sometimes been reported.However,to the best of our knowledge,reports of intussusception due to rectal adenocarcinoma are extremely rare.In this report,the case of a young man with rectal adenocarcinoma causing intussusception is described.A 24-year-old man visited a hospital complaining of abdominal pain,and an upper rectal cancer was diagnosed by colonoscopy.Computed tomography showed intussusception caused by a large tumor in the pelvis and absence of distant metastases.Locally advanced rectal cancer causing intussusception was diagnosed,and a low anterior resection was performed.Intraoperatively,repair of the invagination could not be accomplished easily;therefore,the repair was abandoned.Instead,the tumor was removed en bloc to avoid dissemination of the cancer.Histopathologically,the tumor was diagnosed as a poorly differentiated adenocarcinoma,pStageⅡA.The patient has no evidence of recurrence at 10 mo after the operation.