[Analysis of 61 cases undergoing sphincter-preserving procedure with intersphincteric resection by telescopic anastomosis for ultra-low rectal cancer].

Objective: To investigate the efficacy and safety of sphincter-preserving procedure with transabdominal intersphincteric resection for ultra-low rectal cancer.

Methods: Clinical data of 61 cases with ultra-low rectal cancer (distance from anal verge ranged from 4-5 cm) were analyzed retrospectively. The patients underwent sphincter-preserving procedure with intersphincteric resection and telescopic anastomosis.

Results: There were 34 males and 27 females. The mean age was 56.7 years. The inferior border of the tumor was 4 cm above the anal verge in 21 cases, and 5 cm in 40 cases. There 55 patients with rectal adenocarcinoma in this cohort. The tumor was well-differentiated in 24 cases, moderately-differentiated in 29 cases, and poorly-differentiated in 2 cases. There were 6 cases with malignant adenoma. The TNM staging was T1N0M0 in 36 cases, T2N0M0 in 23, and T3N1M0 in 2. The ability to control defecation significantly improved in 1-3 months postoperatively, and returned to normal in 6-12 months. Two patients developed anastomotic leak (3.3%), and 3 anastomotic stenosis (4.9%) postoperatively. Fifty-four patients(88.5%) had follow-up. The median follow-up time was 6.2 years. The local recurrence rate was 5.6%, and the 5-year-survival rate was 73.5%.

Conclusion: Sphincter-preserving procedure with intersphincteric resection and telescopic anastomosis is a safe and effective procedure for ultra-low rectal cancer.