Clinical History.—A 7-year-old girl banged her head during play at home. The following day she complained of frontal headache; she vomited repeatedly and had three short generalized convulsions. She was, therefore, admitted to the hospital. Previously, her motor development had been reported as being quite normal, but she had had a generalized convulsion at the age of six months and a few mainly left-sided seizures had developed. However, these were well controlled with phenobarbital. She had had no convulsions for the three years prior to admission.
Physical Examination.—The patient was fully conscious and afebrile, but appeared somewhat retarded. A capillary nevus confined to the right frontal region was obvious, but otherwise, general examination findings were normal. There was no neck stiffness. Fundi were normal and the visual fields appeared full on confrontation. Neurologically, no definite abnormality could be demonstrated. Skull roentgenograms were obtained (Fig 1 and 2). The