BACKGROUND AND PURPOSE: Neurovascular contact (NVC) of the trigeminal nerve is not only detected at the affected trigeminal nerve in patients with trigeminal neuralgia (TN) but is also observed at the asymptomatic nerves on the side contralateral to the TN as well as in normal nerves in control subjects. The frequency and severity of the NVC among the affected, contralateral, and normal trigeminal nerves were analyzed by 3D MR cisternogram and angiogram fusion imaging in relation to the cause of TN.

The fusion of 3D MR cisternograms and 3D MR angiograms may prove useful in the pre- and postoperative assessment of MVD in patients with hemifacial spasm.

The advantage of our "double-stick tape" technique is the simplicity of the procedure. The present technique is a feasible alternative for the treatment of hemifacial spasm caused by a tortuous VA.

A case is reported of a traumatic middle meningeal arteriovenous fistula, which was formed on the contralateral side to the head injury without a skull fracture and was no longer demonstrable on the repeated angiogram after 35 days without any surgical intervention. Possible mechanisms of fistula formation and its spontaneous closure are discussed.

The authors report a case of multiple cerebral aneurysms associated with moyamoya disease, in which the reduction and disappearance of bilateral internal carotid artery aneurysms and the new development and enlargement of bisilar artery aneurysms were demonstrated on sequential cerebral angiograms. Possible mechanisms of the spontaneous disappearance and development of cerebral aneurysms in association with moyamoya disease are discussed.