There is a large vividly enhancing extra-axial left frontal mass, which hyperintense T2 signal and hypointense T1 signal. CSF cleft, buckling of the adjacent white matter, pial vessels around the lesion in keeping with an extra-axial location. The lesion demonstrates prominent intralesional flow voids in keeping with a highly vascular lesion.
No restricted diffusion. Resultant severe mass effect on the adjacent brain with distortion of the left frontal lobe. Associated FLAIR signal intensity in the left frontal lobe on the vasogenic oedema. Left to right midline shift.
Several other much smaller extra-axial subfrontal mass lesions with similar imaging characteristics bilaterally, approximately six in number. The largest of these lesions is in the right olfactory groove.