title: A rare case of a retroperitoneal enterogenous cyst with in-situ adenocarcinoma.
abstract: BACKGROUND
  Retroperitoneal enterogenous cysts are uncommon and adenocarcinoma within such cysts is a rare complication.
  
  
  METHODS
  We present the third described case of a retroperitoneal enterogenous cyst with adenocarcinomatous changes and only the second reported case whereby the cyst was not arising from any anatomical structure.
  
  
  CONCLUSIONS
  This case demonstrates the difficulties in making a diagnosis as well as the importance of a multi-disciplinary approach, and raises further questions regarding post-operative treatment with chemotherapy.
authors.affiliation: Department of Surgery, Royal Surrey County Hospital, Guildford, Surrey, GU2 7XX, UK. dr_lordan@yahoo.co.uk.
authors.forename: Jeffrey T
authors.initials: JT
authors.lastname: Lordan
authors.forename: Robin L
authors.initials: RL
authors.lastname: Jones
authors.forename: Nariman D
authors.initials: ND
authors.lastname: Karanjia
authors.forename: Stefano
authors.initials: S
authors.lastname: de Sanctis
authors.forename: James G
authors.initials: JG
authors.lastname: Woodland
authors.forename: Gary
authors.initials: G
authors.lastname: Middleton
authors.forename: Neville
authors.initials: N
authors.lastname: Menezes