Arachnoid cysts are classified as developmental cysts and are common incidental findings. They are usually intracranial and supratentorial in location, but spinal, and even intraneural, cysts may be identified and possibly cause symptoms. Asymptomatic cysts do not require active management. However, some are associated with seizures, local pressure effects, or hydrocephalus and may require treatment.
Mar. 21, 2019