title: Cystadenoma of the liver without mesenchymal stroma in a female following hormonal therapy for acne.
abstract: BACKGROUND
  Liver cystadenomas are relatively rare tumours that can be difficult to diagnose; treatment entails complete surgical extirpation either by either anatomical resection or enucleation.
  
  
  METHODS
  A 19-year-old woman presented with acute onset of abdominal pain and was found to have a multilocular giant liver cyst.The cyst was percutaneously drained; CEA and CA 19-9 tumour markers were elevated in this cyst fluid: CEA 96 microg/L, CAI9-9 37 550 kU/L. The cyst was completely enucleated and has not recurred. Pathological examination confirmed a cystadenoma without mesenchymal stroma, and tumour oestrogen and progesterone receptors were negative.
  
  
  CONCLUSIONS
  This is the fourth report of a liver cystadenoma without mesenchymal stroma in a female and the first to document elevated cyst fluid tumour markers. This case also illustrates the possible relationship between hormonal therapy and tumour growth.
authors.affiliation: Department of Surgery, University of Calgary, Calgary, Alberta, Canada.
authors.forename: E
authors.initials: E
authors.lastname: Dixon
authors.forename: F R
authors.initials: FR
authors.lastname: Sutherland
authors.forename: K
authors.initials: K
authors.lastname: Burak
authors.forename: G
authors.initials: G
authors.lastname: McKinnon
authors.forename: G
authors.initials: G
authors.lastname: May