A Case of Rectal Leiomyoma Generating from Internal Sphincter Muscle Resected by Transvaginal Tumorectomy

Abstract

Leiomyoma of the rectum is relatively rare and is difficult to diagnose histologically preoperatively.
A 65-year-old woman was admitted to our hospital upon referral from another hospital to undergo an operation for internal and external hemorrhoid. Barium enema showed a smooth defect in the anterior wall of the rectum. Colonofiberscopic examination showed a submucosal tumor in the anterior wall of the rectum. It was diagnosed as leiomyoma by needle biopsy and so transvaginal tumorectomy was performed. In the operation, it passed and the transanal ultrasound image was effective.
Since continuity with internal sphincter muscle was accepted, the tumor was considered to have originated in the internal sphincter muscle. The histological diagnosis was leiomyoma.
The postoperative course was uneventful. It is thought that transvaginal tumorectomy might contribute to safe and minimally invasive resection for leiomyoma in the anterior wall of the rectum.