title: Laparoscopic excision of primary retroperitoneal mucinous cystadenoma and malignant predicting factors derived from literature review.
abstract: BACKGROUND
  Primary retroperitoneal mucinous cystic neoplasm is very rare and its histogenesis is unclear.
  
  
  METHODS
  This paper presents the case of a 31-year-old female in whom an incidentally detected retroperitoneal cystic mass, 6.5cm in size, was successfully resected through laparoscopic approach. Pathologic examination revealed a mucinous cystadenoma. The postoperative course was uneventful, and the patient remained free of recurrence six months after surgery.
  
  
  CONCLUSIONS
  Literature review showed that male sex (p=0.019), and solid nodules in cysts (p<0.001) were both significantly associated with malignancy.
  
  
  CONCLUSIONS
  When confronted with a cystic mass in the retroperitoneum, a primary mucinous cystic neoplasm should be considered and complete surgical removal of the tumor without spillage is recommended.
authors.affiliation: Department of Surgery, Chung-Ang University College of Medicine, Republic of Korea. Electronic address: selee508@cau.ac.kr.
authors.forename: Seung Eun
authors.initials: SE
authors.lastname: Lee
authors.affiliation: Department of Internal Medicine, Division of Gastroenterology, Chung-Ang University College of Medicine, Republic of Korea.
authors.forename: Hyung Chul
authors.initials: HC
authors.lastname: Oh
authors.affiliation: Department of Surgery, Chung-Ang University College of Medicine, Republic of Korea.
authors.forename: Yong-Gum
authors.initials: YG
authors.lastname: Park
authors.affiliation: Department of Surgery, Chung-Ang University College of Medicine, Republic of Korea.
authors.forename: Yoo Shin
authors.initials: YS
authors.lastname: Choi
authors.affiliation: Department of Pahtology, Chung-Ang University College of Medicine, Republic of Korea.
authors.forename: Mi Kyung
authors.initials: MK
authors.lastname: Kim
keywords: Cystadenoma; Laparoscopy; Mucinous; Primary; Retroperitoneum