经内外括约肌切除(intersphinctericresection,ISR)最初由Lyttle等[1]介绍,其设计初衷是用于因炎症性肠病而须行全结、直肠切除的病人的肛门切除,手术仅仅切除直肠肛管的内括约肌,保留直肠外括约肌和周围组织,从而达到避免会阴部切口长期不愈的目的。此后,该术式又结合了结肠肛 The internal and external intersphincteric resection (ISR) was originally introduced by Lyttle et al [1] and was originally designed for anorectal excision of patients undergoing total and rectal resection due to inflammatory bowel disease. Surgical resection of the rectal canal only Internal sphincter, retain the rectal sphincter and surrounding tissue, so as to achieve the purpose of avoiding long-term perineal incision unhealed. Since then, the procedure combined with colon anal