Intranuclear vacuoles in Creutzfeldt-Jakob disease.

In an electron microscopic study of brain biopsy material from a case with Creutzfeldt-Jakob disease intranuclear vacuoles containing membrano-vesicular structures were found. To our knowledge this finding has not been previously reported in human spongiform encephalopathies. It may represent a specific alteration associated with Creutzfeldt-Jakob disease, and suggests the possibility of nuclear infection.