<unk>  is a rare condition, although there is still relatively high incidence in Asia and the Middle East. However, the number of reported cases is declining since the introduction of the measles vaccine—eradication of the measles virus prevents the<unk>  mutation and therefore the progression of the disease or even the initial infection itself.
Subacute sclerosing panencephalitis
Progressive multifocal leukoencephalopathy
Hashimoto's encephalopathy
Hereditary diffuse leukoencephalopathy with spheroids
Intravascular lymphomas
HIV-associated nephropathy
Toxic leukoencephalopathy
Progressive rubella panencephalitis