Yongchang Zhao

Lateral internal sphincterotomy with skin grafting for chronic anal fissure: protocol of a multi-center randomized controlled trial

Abstract Background: Anal fissure, a prevalent anorectal disorder, is defined as a longitudinal tear in the anoderm distal to the dentate line.Chronicity develops in a substantial fraction of anal fissures despite initial conservative success, resulting in significant quality-of-...