Figure 10c. Type IV tentorial dural AVF with intracranial hemorrhage. (a) Unenhanced CT scan shows intracranial hemorrhage in the left occipital lobe and the lateral ventricle. (b) Left external carotid angiogram shows a tentorial dural AVF (arrowheads) with leptomeningeal-cortical venous drainage and venous ectasia (arrow). (c) Digital subtraction angiogram obtained during the injection of diluted n-butyl-2 cyanoacrylate demonstrates the tip of a microcatheter (arrow). (d) Left common carotid angiogram obtained after TAE shows complete obliteration of the AVF.