Surgical management of colloid cyst of the third ventricle

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Colloid cysts are rare congenital intracranial tumors, commonly located at the rostral part of the third ventricle in proximity to the foramina of Monro, the fornical columns, and choroid plexus.1 Third ventricle colloid cyst (TVCC) is the most common tumor in the third ventricle and accounts for 0.5%–1.5% of all primary brain tumors.1
A colloid cyst not causing obstruction of the foramina of Monro or blocking the third ventricle will most often be asymptomatic. However, if the cyst causes obstruction of cerebrospinal fluid (CSF) flow, the cyst will become symptomatic. Symptoms and signs of TVCC can be headache, short‐term memory deficiency, impaired vision, papilledema, vertigo, ataxia, incontinence, coma/reduced level of consciousness (RLOC), or sudden death.1
Symptomatic cysts should be treated with surgical resection. Neither the size of the cyst, duration of symptoms, or the presence of hydrocephalus can with certainty predict the risk of neurological deterioration or sudden death.3 This underlines the importance of surgical treatment of symptomatic cysts.
Third ventricular colloid cysts can be resected using conventional microsurgery (MS) (transcortical MS or transcallosal MS) or with endoscopic surgery (ES). The aim of this study of 32 consecutive TVCC from a defined population was to estimate the incidence, the presenting features, the surgical treatment, the treatment related complications, and, lastly, the clinical and surgical outcomes.
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