Fig. 1From: 60-year-old male with rapidly progressive pneumocephalus caused by Clostridium septicum in the setting of an occult colonic adenocarcinoma(A) CT scan at presentation demonstrating 1.2 cm air collection in left parietal lobe (arrow). (B) Brain MRI approximately 8 h later with large (7.3 × 6.1 × 5.3 cm) fluid-gas collection extending into the ventricular systemBack to article page