Fig 2.

Case 2.

A, CT scan shows curvilinear calcification in the cortico-medullary junction at the bottom of cerebral sulci bilaterally but more predominantly in right cerebral hemisphere.

B, T2-weighted MR image shows prominent cortical and subependymal veins (arrowheads), which possibly suggests an arteriovenous shunt with cortical venous reflux as well as hyperintensity in deep white matter that was more apparent on the right.

C–E, Serial right external carotid angiograms (C and D, lateral view; E, frontal view) show enlargement of the middle meningeal artery with early filling of the transverse sinus and retrograde filling of the straight and superior sagittal sinuses. Cortical venous reflux is also evident in the later phase.