Brain MRI images of case 1 from our center. Post‐operative day (POD) 83 = initial magnetic resonance imaging (MRI) or CT‐scan and POD 193 = follow‐up MRI. FLAIR, fluid attenuated inversion recovery images, acquired after intravenous administration of contrast medium. T1 gado = T1‐weighted image after gadolinium administration; T2 = T2‐weighted images. A, Initial MRI: swelling and T2 hyperintensity of basal ganglia (blue); lentiform fork (red); faint contrast enhancement (green); high intensity on DWI and low/normal ADC in basal ganglia (yellow). Follow‐up MRI: decreased signal abnormalities of basal ganglia, with tissue loss. B, Initial MRI: swelling and T2 hyperintensity of mammillary bodies (blue); avid contrast enhancement (red) and no diffusion restriction. Follow‐up MRI: decreased signal abnormalities, tissue loss. C, Initial MRI: Pons: central T2 hyperintensity (blue). Upper cerebellum, SCA territory: diffuse T2 hyperintensity and swelling (red). PICA and AICA territory: asymmetrical focal T2 hyperintensities (green). Pons and SCA territory: no diffusion restriction (not shown). Focal lesions in PICA and AICA territory: diffusion restriction (yellow). Follow‐up MRI: Pons: central T2 hyperintensity (blue); SCA territory decreased signal abnormalities (orange), diffuse atrophy; PICA and AICA territory: focal tissue loss (purple). D, Calcifications in anterior limb of internal capsule (blue)