Figure 4

(Case 2). Six months’ post-operative computed tomography (CT) angiography. This demonstrates the absence of flow in both the supratrochlear and supraorbital arteries, and in the superficial temporal, occipital and posterior auricular arteries on the contralateral side to the tumor. Blood flow is detectable in the superficial temporal, occipital and posterior auricular arteries homolateral to the tumor.