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T2/FLAIR hyperintensity and cortical expansion involving the left middle temporal gyrus is demonstrated. Although the most focally expanded region measures 15 x 16 mm, cortical signal abnormality extends over an AP distance of at least 46 mm (this is better appreciated on recent external MRI). No associated contrast enhancement, diffusion restriction or elevated cerebral blood volume (not shown). Spectroscopy is non contributory due to wandering baseline (not shown).