Colloid Cyst
A colloid cyst is a small sac that develops in the brain. It consists of a tough wall and a protein-rich fluid or solid core, and it typically forms from the roof of the third ventricle. A colloid cyst is benign (not cancerous), but it can grow slowly over time and can cause problems due to blockage of the spinal fluid pathways in the brain. Common symptoms include headaches, nausea, vision changes, and unexplained episodes of fainting or lethargy (sleepiness). Colloid cysts have also been associated with sudden death, though, fortunately, this is very rare.
Treatment is usually recommended for colloid cysts that are causing symptoms or are 1 cm or larger in size. Treatment options include removal and spinal fluid diversion with a shunt. Removal is preferred, when possible. I perform cyst removal using a minimally invasive technique with a small camera (endoscope) with instrument ports.
If you live near Denver and have a colloid cyst, please consider meeting me in consultation to learn about treatment options.
Colloid cyst of the third ventricle.
Endoscopic view of a colloid cyst (red arrow) from the right lateral ventricle. The cyst is intermittently blocking the flow of CSF into the third ventricle. Nearby structures include the choroid plexus (CP) and fornix (F).
Before and after endoscopic removal of a colloid cyst (red arrow).