Of 1,183 patients admitted to the U.C.L.A. Neuropsychiatric Institute during a three-year period, 212 adults and 98 children had skull X-rays performed. The incidence of positive findings which were relevant to the diagnosis and total management of the patient was three percent in both groups. Pneumoencephalograms were positive in three patients with organic brain disease in whom the skull X-rays were normal.There is a need for routine skull roentgenography surveys in university psychiatric hospital populations and for consideration of pneumoencephalography when organic pathology is suspect but the skull X-rays are negative.Abstract Teaser