Arachnoid Cysts · What Are They, Causes, Symptoms, and More

Arachnoid cyst treatment depends on various factors, including the size and location of the cyst, as well as the presence and severity of symptoms. In many cases, small, asymptomatic cysts may not require active treatment and can be monitored periodically with imaging tests to ensure they do not grow or cause problems over time. However, if the cyst is large, causes significant symptoms, or leads to complications such as hydrocephalus, treatment options may be considered. Minimally invasive interventions may be necessary to drain the cyst or remove it entirely, particularly if it is compressing vital structures or obstructing the flow of cerebrospinal fluid. Cystoperitoneal shunting is an invasive option often chosen for treatment, during which a catheter is implanted into the cyst within the brain. Connected through a one-way valve, it empties the excessive fluid into the peritoneal cavity in the abdomen. The purpose of the shunt is to drain excess CSF to another part of the body where it can be absorbed, thus relieving pressure on the brain.   

The available surgical approaches include endoscopic surgery (i.e., use of a thin, flexible endoscope to access a specific area of the brain through small incisions or natural openings, such as the nostrils) and craniotomy (i.e., removal of a section of the skull to temporarily access the brain). Once the cyst is accessed, depending on the individual case, various techniques may be performed such as cyst fenestration (i.e., creating a small opening in the cyst wall to allow fluid to drain) or cyst removal. The goal of treatment is to relieve symptoms, prevent complications, and improve overall quality of life.