What is a colloid cyst and are they dangerous? Colloid cysts are generally slow-growing, non-cancerous brain tumours located in the third ventricle, a fluid-filled cavity in the centre of the brain.

Colloid cysts are benign, non-cancerous fluid-filled sacs found in or around the lateral and third ventricles of the brain, according to the London Neurosurgery Partnership. The Long Lost Family ...

According to the London Neurology Partnership, colloid cysts are small fluid-filled sacs located in or around the lateral and third ventricles of the brain. The presenter’s celebrity colleagues ...

If large enough, a colloid cyst obstructs the movement of cerebrospinal fluid (CSF) in the brain. This results in a build up of CSF in the ventricles of the brain and raises pressure in the skull.