Laparoscopic technique of modified extraperitoneal (retrotransversalis) end colostomy for abdominoperineal excision.

Aim: To describe the technique of a modified extraperitoneal retrotransversalis end colostomy as part of a laparoscopic abdominoperineal excision (APR).

Method: The colostomy site is preoperatively chosen and used intra-operatively for a trocar. After the rectum has been mobilized the descending colon is freed.