Isolated fourth ventricle: ultrasonic diagnosis and follow-up.
D002535:Cerebral Aqueduct / Q000473:pathology; D002552:Cerebral Ventricles / Q000473:pathology*; D002557:Cerebrospinal Fluid Shunts / Q000009:adverse effects; D004108:Dilatation, Pathologic / Q000209:etiology; D004453:Echoencephalography; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000175:diagnosis*; D007223:Infant; D007231:Infant, Newborn