Two cases of rapidly progressive subacute sclerosing panencephalitis. Neuropathological findings.

Two cases of rapidly progressive subacute sclerosing panencephalitis that brought about coma in less than three weeks and death in less than two months are reported. The ultrastructural observations of brain biopsy specimens from these patients found unusual neuropathological findings. These uncommon features are discussed on a cliniconeuropathological basis.