Fig. 1

a-f. Brain magnetic resonance imaging (MRI) was performed 8 days after admission. Cerebral MRI revealed a slight hyperintense signal in the bilateral putamen on a diffusion-weighted imaging sequence and bilateral symmetrical hypointensity in the middle of the putamen as well as hyperintensity around hypointensity on b apparent diffusion coefficient, c fluid-attenuated inversion recovery, and d T2-weighted imaging sequence. The lesions were hyperintense in the middle of the bilateral putamen and hypointense around them on e T1-weighted imaging sequence. f The inferior sagittal sinus, straight sinus, and vein of Galen were not observed on magnetic resonance venography (MRV) performed on the 12th day of admission. The superior sagittal sinus was poorly developed based on MRV