cerebellar mutism syndrome (SAYR-eh-BEH-ler MYOO-tih-zum SIN-drome)
A condition that may occur in patients who have had surgery to remove a tumor in certain parts of the brain, including the cerebellum. Cerebellar mutism syndrome usually appears 1 or 2 days after surgery. Symptoms include loss of speech, trouble swallowing and eating, loss of balance, trouble walking, loss of muscle tone, mood swings, and changes in personality. Many of these symptoms go away over time. Also called CMS.