FIG 3. Patient 5, a 20-year-old woman with seizures and left motor deficit of sudden onset.

A, CT angiogram, obtained 1 day after onset, shows an occluded superior sagittal sinus. The deep venous system was intact (not shown).

B, Initial MR imaging and CT were performed 1 day after onset. CT scan shows a large area of hypodensity with focal areas of hyperdensity corresponding to a recent hematoma. Axial FLAIR (10002/148/2200 [TR/TE/TI]) and diffusion-weighted (4000/120 [TR/TE], b = 1000 s/mm²) images show a heterogeneous area with predominant areas of hyperintensity and hypointensity at the site of the hematoma seen on the CT scan. ADC map shows mixed areas of increased ADC values (1.66 10^-3 mm²/s) (ie, z score >3), at the lower limit of normal values (0.59 10^-3 mm²/s) (ie, z score = -1.9), or slightly decreased ADC values (0.58 10^-3 mm²/s) (ie, z score <-2).

C, Follow-up MR image obtained 6 months after onset shows left frontal sequelae in areas with initially decreased or normal ADC values (2D time-of-flight source image used to illustrate MR sequelae). The patient had no clinical deficit.