“…Computed tomographic scans were performed in 13 patients. They were normal in four patients (11,17,18,19) and abnormal in 9 patients. Abnormalities observed during an attack consisted of areas of low density in four cases (2,4,7,8), areas of contrast enhancement in five cases (2,3,14,15,16), and enlargement of CSF spaces in four cases (3,12,14,15).…”