Ruptured intracranial dermoid

Case contributed by A.Prof Frank Gaillard

Presentation

Sudden onset headache and meningism.

Modality: CT

Case Discussion

Two selected axial non-contrast CT images demonstrate hypodense material lying above the CSF in the frontal horns of the lateral ventricles, and around the pineal gland as well as smaller locules in the Sylvian fissures bilaterally and in the cerebellopontine cistern. 

The differential would be of air / gas or fat which can be distinguished on windowing and Houndsfield unit measurment. In this case the material is confirmed to be of fat density, consistent with a ruptured intracranial dermoid.

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Case Information

rID: 10585
Case created: 23rd Aug 2010
Last edited: 18th Nov 2015
Inclusion in quiz mode: Included

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