Kinking of the aqueduct of Sylvius in the absence of posterior fossa masses.
The kinked or "hockey stick" deformity of the aqueduct of Sylvius has long been considered pathognomonic of a mass in the posterior fossa. Five patients with kinking of the aqueduct of Sylvius are described. All had intracranial abnormalities but none had a mass in the posterior fossa.
D000293:Adolescent; D000368:Aged; D002535:Cerebral Aqueduct / Q000002:abnormalities* / Q000000981:diagnostic imaging; D002648:Child; D003388:Cranial Fossa, Posterior / Q000002:abnormalities* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D011011:Pneumoencephalography; D012886:Skull / Q000002:abnormalities*