[Treatment Outcome of Intersphincteric Resection in Tokyo Medical University Hospital].

PURPOSE: This study aimed to consider the oncological validity of intersphincteric resection(hereinafter referred to as ISR) performed at Tokyo Medical University Hospital, as well as associated dysfunction.

SUBJECTS: Subjects included 73 cases in which ISR was performed at Tokyo Medical University Hospital between November 2004 and January 2016.

RESULTS: The 5- year overall and relapse-free survival rates for cases with Stage 0 to III were 90.4% and 77.3%, respectively. Two cases with recurrence among cases with Stage I were both of local recurrence.The Wexner score of the cases 12 months after closure of ileostomy was 4.2±2.5 points, while it had not been performed for the other 10 cases.

DISCUSSION: In consideration of the relatively preferable local control observed with ISRs that had been performed at our hospital, defecation disorder was considered to be within an allowance.However, there remained a problem that closure of ileostomy could not be performed for 10% of the cases.

CONCLUSION: ISR was believed to be valid as a sphincter-preserving procedure in consideration of the function and curability.