Acute cognitive decline.
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T2 brightening in the right frontal lobe - note hyperintensity in the cortex on T2 and T1 without any substantial enhancement = pseudolaminar necrosis, i.e. subacute cerebral infarction. Despite increased signal on DWI, majority of the lesion shows minimal restriction of diffusion on the ADC map = probable "fogging", i.e. transition between subacute infarction and healing. Occurs between 1-5 weeks after infarction.
- AJNR Am J Neuroradiol. 2003 Apr;24(4):680-7