Over a period of 8 years we have applied the technique of arteriography to the study of spinal cord vascular malformations. By selective opacification of radicular vessels we have investigated angiomas at many levels of the spinal cord, both preoperatively to locate major feeding vessels and postoperatively to determine the degree of surgical success.This method has also been used to study a wide variety of nonangiomatous spinal tumors in order to evaluate the extra-arachnoid extent of these masses and to identify major vascular landmarks.More recently this type of arteriography has been utilized in the study of medullary ischemia where it has been valuable in demonstrating radicular artery occlusions and in revealing various pathways of collateral circulation to the spinal cord.Selective arteriography has proved to be not only more informative to the physician, but also less dangerous for the patient than aortography, and, consequently, this procedure should be of considerable assistance in the future st...