Giant Colloid Cyst of Third Ventricle: A Rare Case Report

Colloid cysts are rare non-neoplastic true epithelium-lined cysts of the central neuraxis, commonly arising in the anterior part of the third ventricle. They have a wide spectrum of clinical presentation being asymptomatic for a long time while some can present with paroxysmal headache, gait disturbance, nausea, vomiting, behavioral changes, weaknesses of lower limbs, impaired memory, new learning disability, and sudden death. Patients may remain asymptomatic cyst size more than 3 cm are defined as huge or giant colloid cyst. Only a few cases of huge colloid cysts have been reported in the literature. We present a case of a 62-year-old man with huge colloid cyst of the third ventricle causing obstructive hydrocephalus.