Transanal total mesorectal excision for a large leiomyosarco
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Gastrointestinal leiomyosarcoma (LMS) is a rare entity that could not be accurately diagnosed until c-kit, a characteristic marker of gastrointestinal stromal tumor (GIST), was discovered in 1998. Rectal LMS is usually detected at a smaller size compared with colonic LMS because there are often symptoms in rectal LMS. However, when a large tumor is found in the lower rectum, it is difficult to excise because of the narrow pelvic space. Transanal total mesorectal excision (TaTME) has been reported to be useful for removal of large pelvic tumors. Here, we present a case of large LMS in the lower rectum. The cavity of the lesser pelvis was almost completely occupied by the tumor. There has been no report about a large LMS in the lower rectum which was removed by the hybrid method of laparoscopic and TaTME approaches...

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