Comparison of Botulinum Toxin Injection and Lateral Internal Sphincterotomy for the Treatment of Chronic Anal Fissure

Abstract

Although the healing rate of chronic anal fissure is considerably high with botulinum toxin injection with earlier recovery and less complications compared with sphincterotomy, it occasionally requires a repeat injection, and the healing is slower. The early (two months) and late (one year) healing rates are significantly higher in the sphincterotomy group, the two groups reaching similar healing rates only at six months.