A brain cyst is a fluid-filled sac in the brain that can be benign or malignant. Brain cysts can be caused by developmental malformations in utero, head injury or trauma, or may be present at birth. There are several different types of brain cysts, including colloid cysts, arachnoid cysts, and pineal cysts. Symptoms of a brain cyst can include headache, nausea, vomiting, balance problems, seizures, vision loss, and hearing loss. The symptoms can be associated with other medical conditions, so it is important to discuss concerns about your health with your doctor. Brain cyst treatment is determined by the location, size, and type of cyst. Children with a small brain cyst that is not changing or causing pressure on the brain may not require surgery. Pediatric neurosurgeons may monitor the cyst’s growth with routine imaging appointments. Brain cyst treatment aims to drain fluid from the cyst and relieve pressure, and can be accomplished through several treatment options, including craniotomy.