Traumatic middle meningeal arteriovenous fistula. Report of 3 cases and analysis of 32 cases.

Three cases of traumatic middle meningeal arteriovenous fistula are reported and 32 cases, including ours, reported in the literature are analyzed. In these 32 cases, the appearance of the arteriovenous fistula at angiography exhibited one of three different configurations: type 1, the middle meningeal vein shows a railway configuration; type 2, the middle meningeal vein shows a rod configuration; type 3, extravasation of contrast material and/or pseudoaneurysm are concomitant. In correlating the angiographic type and clinical course, the following tendencies were observed: the clinical course was good in type 1, fair in type 2 and poor in type 3, respectively.