FIG 2. A 60-year-old female patient with right sphenoid ridge meningioma.

A, Lateral superselective angiogram of the right accessory meningeal artery shows a stain of the tumor (arrow). A remarkable stain (arrowheads) is observed at the level of the proximal portion of the feeding artery.

B, Angio-CT image at the level of the proximal portion of the feeding artery shows marked enhancement of the lateral pterigoid muscle (arrow). Because angio-CT definitely showed blood supply to the masticatory muscle, the tip of the catheter was advanced more distally to prevent the muscle injury.