2020 Volume 53 Issue 8 Pages 665-674
We report a case of rectal gastrointestinal stromal tumor (GIST) that was treated with transanal minimally invasive surgery (TAMIS). The patient was a 63-year-old male who was found to have a tumor between the prostate and rectum on US. MRI showed a rectal tumor displacing the prostate ventrally. The submucosal tumor was approximately 2.5 cm in diameter in the left anterior wall of the lower rectum and the distal margin was 2 cm above the dentate line. Under a diagnosis of rectal GIST, local resection was performed by TAMIS, based on the relatively small size of the tumor and preservation of anal function. A transanal access device was inserted, and local resection of the tumor with full-thickness incision of the rectal wall was performed after creating a pneumorectum. The rectal wall defect was surgically closed. Rectal GIST is a relatively rare tumor of the gastrointestinal tract, and a tumor located in the lower rectum requires a conventional extended operation. TAMIS for a rectal GIST with careful consideration of both curative resection and preserving anal function seems safe and feasible using transanal total mesorectal excision (TaTME), which is progressively becoming more common.
