CNS tumor
CNS cysts
Choroid plexus cyst

Author: Eman Abdelzaher, M.D., Ph.D. (see Authors page)

Revised: 22 August 2017, last major update February 2012

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

PubMed Search: Choroid plexus cyst [title]

Cite this page: Abdelzaher, E. Choroid plexus cyst. PathologyOutlines.com website. http://pathologyoutlines.com/topic/cnstumorchoroidplexuscyst.html. Accessed October 20th, 2017.
Definition / general
  • Small cyst of choroid plexus containing CSF
Sites
  • May be present throughout ventricular system but usually in glomus of lateral ventricles
Clinical features
  • More prevalent in fetuses with chromosomal abnormalities (trisomy 18, trisomy 21, Aicardi syndrome)
  • Common form affect fetuses in 1% of pregnancies; usually asymptomatic, resolves spontaneously by birth but large cysts can cause hydrocephalus
  • Chromosomal abnormalities, specifically trisomy 18, should be considered if cysts are large ( > 1 cm), bilateral or irregular or if maternal age ≥ 32 years (AJR Am J Roentgenol 2009;192:32)
  • In adults, usually asymptomatic, incidental postmortem finding
Radiology description
  • On CT and MRI, usually show CSF density
Radiology images

Images hosted on other servers:

MR shows small cyst

Choroid plexus cyst

MRI shows cyst of third ventricle

Case reports
Clinical images

Images hosted on other servers:

Cyst at foramen of Monro

Microscopic (histologic) description
  • Cyst wall lined by cuboidal to columnar epithelium with occasional cobblestone appearance typical of normal choroid plexus
  • Some are devoid of epithelial lining
Microscopic (histologic) images

Images hosted on other servers:

Choroid plexus cyst

Positive stains
Negative stains