ABSTRACT
INTRODUCTION Colloid cysts are histologically benign tumors that represent between 0.5% and 2% of all intracranial neoplasms. These are mostly located at the anterior part of the third ventricle and are able to produce occlusion of the foramina of Monro with resultant obstructive biventricular hydrocephalus. Because of their obstructive nature, colloid cysts can cause rapid neurological deterioration and even sudden death. On the other hand, neurological and neuropsychological deficits can be observed in patients without increased intracranial pressure (1). The vast majority of colloid cysts reported in the literature is symptomatic and were therefore treated.
