[Symptoms and clinical signs, laboratory data in 80 cases of subacute sclerosing panencephalitis].

Clinical signs, laboratory data and electroencephalography were studied in 80 cases of subacute sclerosing panencephalitis. Myoclonus with or without intellectual deterioration was the most frequent symptoms (56,2 p. 100). EEG was one of the more specific tests; diazepam injection made it more sensitive. Level of complement fixing antibodies in the CSF was sometimes low, even in advanced cases (29 out of 70; 41 p. 100). CT was normal in 70 p. 100 of cases, showed cerebral atrophy in 17 p. 100 and some other (uncommon) signs in 13 p. 100 of cases.