Presentation
Intermittent headaches.
Patient Data
Age: 75 years
Gender: Male
From the case:
Colloid cyst of the third ventricle
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Well defined, rounded, hyperdense lesion (~75 HU) at the roof of the 3rd ventricle - the typical appearance of a colloid cyst.
Case Discussion
Colloid cysts account for 0.5-3% of primary brain tumors and 15-20% of intraventricular masses 1-3. They are located at the foramen of Monro in 99% of cases 1.