Left parietal mini-craniotomy has been performed, underlying which there is a very small extra-axial collection and dural thickening. Pneumocephalus overlies the anterior left frontal lobe. Expansile mass in the left superior frontal and cingulate gyri extending into the left side of the posterior body of the corpus callosum is again demonstrated (compared with diagnostic MRI performed some days earlier). New focus of intrinsic T1 hyperintensity and FLAIR hypointensity at the superior margin of the mass is in keeping with blood related to the recent biopsy. At this location, the mass demonstrates less solid contrast enhancement consistent with partial tumour excision. The remainder of the lesion is unchanged in appearance, demonstrating central and peripheral contrast enhancement and evidence of haemorrhage. A small amount of surrounding FLAIR hyperintensity is stable.
No hydrocephalus. No diffusion restriction to suggest acute infarction. Non-enhancing FLAIR hyperintense lesion in the left middle cerebellar peduncle is unchanged.
IMPRESSION: Post-biopsy appearances in the left frontal mass.