fig 1.

Patient 1.

A, Superselective angiogram of the right external carotid artery (lateral view) shows blood supply of frontal and frontobasal meningiomas by branches of the frontal and parietal branches of the right middle meningeal artery.

B, Coronal T1-weighted spin-echo MR image (532/17/2) 12 hours after embolization shows persistent uptake of contrast medium in both meningiomas despite complete devascularization of the external carotid artery feeders.

C, Contrast-enhanced axial T1-weighted images (490/17/2) 12 hours (top left), 8 months (top right), 14 months (bottom left), and 22 months (bottom right) after embolization show a reduction in size and contrast enhancement of the meningioma. After 22 months, there is only a slight peripheral uptake of contrast medium.

D and E, Axial T2-weighted spin-echo images (1957/80/2) before (D) and 22 months after (E) embolization. The intensity changed from an isointense signal to a marked hypointense signal, which was probably due to intratumoral thrombosis.