[Histological and ultrastructural features of a case of subacute sclerosing panencephalitis (author's transl)].

A case of subacute sclerosing panencephalitis is described from a clinical, histopathological and ultrastructural point of view. The most notable morphologic feature is the presence of a great number of nuclear inclusions inside both neurons and oligodendroglial cells. These inclusions are spread to the whole brain and are decreasing in number from the cerebral cortex towards midbrain. The cerebellum is completely spared. The Authors discuss the problems related to the viral origin of the disease, to the diffusion of the virus inside nervous system and to the myelin degeneration in the light of the recent literature.