Colloid Cyst of the Third Ventricle: Case report and Literature Review.

Background: Colloid cysts account for approximately 1% of all intracranial tumors and are the most common type of the neuroepithelial cysts. They are benign, that most commonly occur in the third ventricle near the Monro foramen. Sometimes they have no specific sings and symptoms and may be confused and misdiagnosed with other pathology of nervous systems, but sometimes they may produce acute hydrocephalus, brain herniation, and lead to death.

Objective: We present a case of 40 years old male patient with brain colloid cyst.

Discussion: The patient was admitted at Clinic of Radiology, for headache and episode of vomit. He was treated for signs and symptoms of depression since 2017. In clinical examination patient had symptoms of brain tumor. The MRI scan demonstrated a cyst in foramen Monroe region with typical signal intensities in the formation that confirm the diagnosis of colloid cyst as delated of lateral ventricle as signs of early hydrocephalus. After diagnosis the patient was recommended to consult with a Neurosurgeon for intervention. The cyst was removed and similar findings revealed also on histopathological examination. Many of colloid cysts manifest with no specific signs and symptoms that may be confused with depression.

Conclusion: On rare occasions, they may completely and irreversibly obstruct the foramen of Monroe, resulting in sudden loss of consciousness and, if patients are not treated, in coma and death. So carefully check the MRI scans is very important, not only in diagnosis but also in planning of treatment.