[Analysis of 32 patients with rectal adenoma undergoing transanal endoscopic microsurgery].

Objective: To evaluate the safety and outcomes after transanal endoscopic microsurgery (TEM)for rectal adenoma.

Methods: Data of 32 patients undergoing TEM for rectal adenoma between September 2006 and February 2010 in the Ruijin Hospital were reviewed.

Results: The adenoma diameter ranged from 0.6 to 10.0(2.3±1.2) cm. The mean operative time was 70(range,20-180) min. The estimated blood loss was less than 10 ml. There were no conversions to transabdominal procedure. Twenty-two(68.8%) patients underwent suturing of the wound, of whom 14 had full-thickness resection. Two patients had perforation into peritoneal cavity during full-thickness resection, which were repaired by continuous suturing and no postoperative leak occurred. R0 resection was achieved in 31(96.9%) patients. Postoperative pathology showed 12 simple adenomas, 10 adenomas with low grade intraepithelial neoplasia, 5 adenomas with high grade intraepithelial neoplasia, and 5 T1 focal carcinomas. Complications included rectal bleeding in 1 patient, acute urinary retention in 1 patient, and pulmonary infection in 1 patient. The postoperative stay was 4.5(3-8) days. The patients were followed-up for a period of 23 months(range, 2-43 months). There were 2 tumors recurred.

Conclusion: TEM is a safe and effective minimally invasive surgical technique for large rectal adenomas.