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DWI, FLAIR and SWI on brain MRI at the onset of PRES. FLAIR: oedema in pontine, middle cerebellar peduncle (lower panel) and supratentorial, predominantly anterior (upper panel). SWI: numerous thalamic, callosal and subcortical white matter micro-haemorrhages. DWI, diffusion-weighted MRI; FLAIR, fluid-attenuated inversion recovery; PRES, posterior reversible encephalopathy syndrome; SWI, susceptibility weighted imaging.
