Liver and intrahepatic bile ducts - nontumor
Developmental anomalies / cysts
Solitary cyst

Author: Komal Arora, M.D. (see Authors page)

Revised: 26 October 2017, last major update April 2012

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Solitary cyst[TI] liver

Cite this page: Arora, K. Solitary cyst. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/liversolitarycyst.html. Accessed November 19th, 2017.
Definition / general
  • Also called unilocular, simple or congenital cyst
  • Not associated with cysts in other organs
  • 80% occur in women
  • Usually incidental finding; may be due to von Meyenburg complexes that separate from biliary tree and dilate
  • 20x more common than cystadenomas; present in 14% of autopsies if looked for
  • Complications are torsion, hemorrhage, rupture, compression of adjacent biliary tree
  • Carcinoma rarely arises in these cysts (HPB Surg 1992;5:203)
Treatment
  • Excision, sclerotherapy, cyst fenestration
Gross description
  • Single, unilocular cyst, usually subcapsular or in falciform ligament
  • 2 - 40 cm with flat glistening lining
  • Variable amounts of clear amber fluid (may contain blood, bile, mucus, pus)
  • Usually separate from biliary tree
Microscopic (histologic) description
  • Lined by biliary type epithelium (flat / cuboidal), occasionally ciliated (called foregut cyst) or squamous lined (epidermoid cyst)
  • Epithelium rests on thin collagenous wall without spindle cell stroma
  • Degenerative changes include epithelial desquamation, multiloculation, calcification