卷缩收缩法
crimp-contracting process
保留肛门
anal preservation
anal sphincter preservation
Sphincter preservation
Anus preserving
Carcinoma of the rectum
保留肛门括约肌手术
sphincter preservation operation
sphincter preserving surgery
Sphincetr-preserving operation
保留肛门括约肌之直肠瘤切除术
sphincter saving resection of the rectum