Slow measles encephalitis or subacute sclerosing panencephalitis.

A 10-year-old boy with subacute sclerosing panencehalitis (SSPE) is presented. The diagnosis was confirmed by typical clinical picture, electroencephalographic changes, post-mortem pathohistological study and high titer of measles antibodies in serum and cerebrospinal fluid. Serum to cerebrospinal fluid ratio of measles antibody titers was 16. The determination of measles antibody titer in the serum and cerebrospinal fluid, by using complement fixation and hemagglutinin inhibition tests, should be done in all patients with SSPE.