A colloid cyst is a rare type of brain cyst that typically occurs in the third ventricle, a fluid-filled cavity in the brain. It is composed of a gelatinous substance called colloid, which gives it its name. Colloid cysts are usually small in size, ranging from a few millimeters to a few centimeters.
Although colloid cysts are generally benign, they can cause significant health problems due to their location in the brain. The cysts can obstruct the flow of cerebrospinal fluid (CSF), leading to a condition called hydrocephalus. Hydrocephalus occurs when there is an accumulation of CSF, causing increased pressure on the brain.
Symptoms of a colloid cyst may include: headaches, nausea, vomiting, dizziness, memory problems, and changes in vision. In some cases, the cysts may not cause any symptoms and are incidentally discovered during brain imaging for other reasons.
Treatment for colloid cysts typically involves surgical removal to relieve the obstruction and prevent further complications. The surgical procedure is performed by a neurosurgeon and aims to safely remove the cyst while minimizing damage to surrounding brain tissue.