Non-tumoral aqueduct stenosis.
D000293:Adolescent; D000328:Adult; D001927:Brain Diseases / Q000175:diagnosis / Q000473:pathology* / Q000628:therapy; D002535:Cerebral Aqueduct / Q000473:pathology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged