The significance of the failed pneumoencephalogram.
D000238:Adenoma, Chromophobe / Q000000981:diagnostic imaging; D000328:Adult; D000368:Aged; D000768:Anesthesia, General / Q000009:adverse effects; D001139:Arnold-Chiari Malformation / Q000000981:diagnostic imaging; D001927:Brain Diseases / Q000000981:diagnostic imaging*; D001932:Brain Neoplasms / Q000000981:diagnostic imaging*; D001933:Brain Stem / Q000000981:diagnostic imaging; D002528:Cerebellar Neoplasms / Q000000981:diagnostic imaging; D014695:Cerebral Ventriculography; D004806:Ependymoma / Q000000981:diagnostic imaging; D005260:Female; D005910:Glioma / Q000000981:diagnostic imaging; D006394:Hemangiosarcoma / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008722:Methods; D009362:Neoplasm Metastasis; D010911:Pituitary Neoplasms / Q000000981:diagnostic imaging; D011011:Pneumoencephalography