title: Colovaginal anastomosis: an unusual complication of stapler use in restorative procedure after Hartmann operation.
abstract: BACKGROUND
  Rectovaginal fistula is uncommon after lower anterior resection for rectal cancer. The most leading cause of this complication is involvement of the posterior wall of the vagina into the staple line when firing the circular stapler.
  
  
  METHODS
  A 50-year-old women underwent resection for obstructed carcinoma of the sigmoid colon with Hartmann procedure. Four months later she underwent restorative surgery with circular stapler. Following which she developed rectovaginal fistula. A transvaginal repair was performed but stool passing from vagina not per rectum. Laporotomy revealed colovaginal anastomosis, which was corrected accordingly. Patient had an uneventful recovery.
  
  
  CONCLUSIONS
  Inadvertent formation of colovaginal anastomosis associated with a rectovaginal fistula is a rare complication caused by the operator's error. The present case again highlights the importance of ensuring that the posterior wall of vagina is away from the staple line.
authors.affiliation: Department of Gastrointestinal Surgery, Xiangya Hospital, Central South University, Changsha 410008, China. zhongshu.yan@163.com
authors.forename: Zhongshu
authors.initials: Z
authors.lastname: Yan
authors.forename: Guoqing
authors.initials: G
authors.lastname: Liao