Sloughing of cerebellar tonsils into spinal canal.
D002526:Cerebellar Diseases; D006801:Humans; D014066:Palatine Tonsil; D012119:Respiration; D012121:Respiration, Artificial; D013115:Spinal Canal; D013346:Subarachnoid Space
CEREBELLAR DISEASES; RESPIRATION, ARTIFICIAL; SPINAL CANAL; SUBARACHNOID SPACE