Diffuse pneumocephalus from Clostridium perfringens meningitis: CT findings.

Pneumocephalus is defined as "the presence of air or gas within the cranial cavity" [1] , but no distinction is made between localized and diffuse gas collections . We report a case of diffuse pneumocephalus caused by the gas-forming organism Clostridium perfringens. To the best of our knowledge, this is the first demonstration of diffuse pneumocephalus associated with Clostridium meningitis and the first publication of the CT findings.