Colloid cysts are non-neoplastic intracranial cysts and really not a classical brain “tumor”.
Mean age of patients presenting with colloid cyst is 20 to 40 years with no sex predominance.
They are usually found at the foramen of Monro, in the anterior roof of the third ventricle.
This cyst is filled with a gelatinous, viscous material.
The colloid cyst usually becomes symptomatic in adults when it obstructs, the foramina of Monro and results in hydrocephalus. Rare but well-documented cases have been associated with severe headache followed by sudden death
Macroscopically, the smooth wall of the lesion is filled with a viscous fluid that can result in a severe ventriculitis if spilled. The lesion grows slowly, and malignant change has not been reported.
