Colloid cyst

Case contributed by Jack Ren

Presentation

Headaches for investigation.

Patient Data

Age: 40
Gender: Female
Modality: MRI

In the roof of the third ventricle, just posterior to the foramen of Munro is a small (~6mm) rounded mass with low T2 signal. It is difficult to see on T1 axial images, but can be appreciated on SWI by a thin rim of low signal. On post contrast images it does not enhance and appears isointense to parenchyma. 

Case Discussion

These features are characteristic of a colloid cyst. In a patient with non-specific headaches management can be difficult as attributing the headaches to the colloid cyst may not be correct. Sudden death is however a possibility from these lesions (sudden hydrocephalus? venous compromise? other?) and as such dismissing them can be foolhardy especially if they are sizeable. 

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Case Information

rID: 23319
Case created: 5th Jun 2013
Last edited: 25th Nov 2015
Inclusion in quiz mode: Included

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