“…The failure rates are 41, 13, 12, and 10% for the transanal, transabdominal, transanal sphincteric, and transperineal approaches, respectively, according to a systematic review [1] . Recently, Kanehira et al [9] reported transanal endoscopic surgery without interposition of a muscle flap for URF patients and showed excellent results on selected cases. Although their method is less invasive, they insist that URFs with wide, hard scar tissue due to multiple attempts at surgical repair or any type of energy ablation are not indicated for their procedure.…”