title: Congenital fourth ventricualr outlet blocks.
mesh_terms: D000293:Adolescent; D000328:Adult; D001344:Autopsy; D001921:Brain / Q000473:pathology; D002552:Cerebral Ventricles / Q000002:abnormalities*; D002648:Child; D002675:Child, Preschool; D003616:Dandy-Walker Syndrome / Q000473:pathology; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology* / Q000473:pathology; D007223:Infant; D008297:Male; D008566:Membranes / Q000473:pathology