Trapped IV ventricle.
Lunsford
L Dade
LD
D001927:Brain Diseases / Q000628:therapy*; D002535:Cerebral Aqueduct; D020546:Fourth Ventricle; D049673:History, 20th Century; D006801:Humans; D044583:Neuroendoscopy; D019635:Neurosurgical Procedures / Q000266:history*; D015607:Stents