Transanal total mesorectal excision for treating a lower rectal inflammatory myofibroblastic tumor: A case report

Abstract

Rectal inflammatory myofibroblastic tumors are extremely rare, with no reports of their preoperative diagnosis. A 17-year-old woman who presented with low-grade fever, repeated diarrhea, constipation, and a 1-month history of anal pain was referred to our hospital. Rectal examination revealed a palpable hard mass with a smooth surface at the posterior wall 4 cm from the anal verge. Colonoscopy revealed a 4.0-cm submucosal tumor in the upper edge of the anal canal.Computed tomography and magnetic resonance imaging revealed a 5.0 Â 4.0 cmsized well-defined tumor contacting the rectum. Computed tomography-guided