Colloid cyst

Case contributed by Dr Patrick Wright

Presentation

Confusion status after an alleged fall.

Patient Data

Age: 70 years
Gender: Female

Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines." and add the tag = "legacy

CT

Multiplanar imaging from a NECT of the brain demonstrates a round hyperdense mass arising from the third ventricle. No evidence of hydrocephalus. 

Case Discussion

 A colloid cyst is a rare benign lesion arising within the third ventricle accounting for 0.5-1% of primary brain tumors. Typically, colloid cysts are clinically silent, but when symptomatic patients most often present with chronic headaches. Although a colloid cyst is histologically benign, it can cause obstructive hydrocephalus, herniation, and sudden death.

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