Fig. 4From: Management of a case of high-risk gastrointestinal stromal tumor in rectum by transanal minimal invasive surgerySurgical procedure. a Mucosal dissection performed along the tattoo circumferentially 1 cm from the tumor margin. b Full-thickness dissection of tumor performed circumferentially. c Dissection performed between rectum and mesorectum on the posterior wall. d Extraction of the tumor using the Endo Catch specimen pouchBack to article page