Fig. 8From: Brain tumour post-treatment imaging and treatment-related complicationsPseudoprogression. A 46-year-old male with left callosal/pericallosal glioblastoma multiforme. Initial post-resection MRI demonstrates a small area of irregular enhancement along the anterior margin of the resection cavity (arrow). Follow-up imaging obtained 4Â months later (2Â months after completion of radiation) demonstrates a significant increase in peripheral, now thick, fluffy enhancement along the resection cavity, most marked posteriorly (bracket). Repeat MRI obtained 8Â months post resection demonstrates decreased enhancement (arrowhead). No appreciable elevated perfusion or diffusion restriction was present (not shown). The constellation of findings is compatible with pseudoprogression on the 4-month postoperative scanBack to article page