IS Case 442: Choroidal fissure cyst

Trushar Sarang, MD

University of Rochester

Imaging Sciences URMC 2010
Publication Date: 2010-08-30


A 40-year-old female was found unresponsive.


Rounded CSF space along the lateral aspect of the right choroidal fissure.


Choroidal fissure cyst


Choroidal fissure cysts are benign incidental findings. Knowledge of these cysts are important as to not confuse these lesions with other more dire pathology such as cystic neoplasms or infectious cysts.

These lesions are identified by their characteristic location along the lateral aspect of the quadreminal plate cistern and homogeneous CT attenuation consistent with CSF. Occasionally, these cysts may exert small mass effect upon the adjacent brain parenchyma and may occasionally compress the adjacent hippocampus. No treatment is required.


  1. Sherman JL, Camponovo E, Citrin CM. MR imaging of CSF-like choroidal fissure and parenchymal cysts of the brain. AJR Am J Roentgenol. 1990 Nov;155(5):1069-75. MID: 2120937
  2. Osborn AG, Preece MT. Intracranial cysts: radiologic-pathologic correlation and imaging approach. Radiology. 2006 Jun;239(3):650-64.PMID: 16714456

1 image