Colloid cyst with hydrocephalus

Case contributed by Assoc Prof Frank Gaillard



Patient Data

Age: 40 years
Gender: Male

Hydrocephalus of the lateral ventricles with a hyperdense rounded lesions at the foramen of Munro consistent with a colloid cyst


The colloid cyst easily seen on CT is far less obvious on MRI. It is most easily seen on sagittal T1. 

Case Discussion

This case of a 40-year-old woman with a colloid cyst causing obstructive hydrocephalus was subsequently histologically proven. Imaging appearances are pathognomonic. 

Case courtesy of Bob Cook, MD. Western Memorial Regional Hospital Corner Brook, Newfoundland.

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Case information

rID: 9373
Published: 9th Apr 2010
Last edited: 19th May 2020
Inclusion in quiz mode: Included

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