title: Surgical management of retrorectal tumors: a retrospective study of a 9-year experience in a single institution.
abstract: BACKGROUND
  The relative rarity and anatomical position of retrorectal tumors may lead to difficulty in diagnosis and surgical management.
  
  
  METHODS
  This was a retrospective review of 62 patients who had resection of retrorectal tumors between 2002 and 2010.
  
  
  RESULTS
  All patients in this study were treated by excision of the retrorectal tumors. Surgical approach included transsacral approach (52 cases), transabdominal approach (eight cases), and combined approach (two cases). A total of 48 benign lesions (77.4%) and 14 malignant lesions (22.6%) were confirmed by histological examination. The 48 benign cases included dermoid cysts (17 cases), simple cysts (eight cases), teratomas (eight cases), neurofibromas (eight cases), fibrolipomas (four cases), neurilemmomas (two cases), and synovioma (one case). The 14 malignant cases included lymphomas (four cases), malignant teratomas (three cases), fibrosarcomas (two cases), interstitialomas (four cases) and malignant mesothelioma (one case). Complications occurred in 14.5% of patients and included intraoperative bleeding (three cases), rectal injury (three cases), and presacral infection (three cases).
  
  
  CONCLUSIONS
  Primary retrorectal tumors are very rare. Successful treatment of these tumors requires extensive knowledge of pelvic anatomy and expertise in pelvic surgery.
authors.affiliation: Department of Coloproctological Surgery, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou.
authors.forename: Caizhao
authors.initials: C
authors.lastname: Lin
authors.forename: Ketao
authors.initials: K
authors.lastname: Jin
authors.forename: Huanrong
authors.initials: H
authors.lastname: Lan
authors.forename: Lisong
authors.initials: L
authors.lastname: Teng
authors.forename: Jianjiang
authors.initials: J
authors.lastname: Lin
authors.forename: Wenbin
authors.initials: W
authors.lastname: Chen