Sonography of intraoperative spinal arteriovenous malformations.

Ultrasound facilitates the intraoperative localization of intracranial lesions. t.21t is also useful in spinal cord surgery in many different situations, such as the 10calizaA tion of tumors,J.4 evaluation of trauma,S monitoring of intramedullary position of shunting catheters during surgery, and guidance for drainage of spinal cord cysts or cystic components of tumors. We describe an additional application, the intraoperative use of ultrasound, to examine two spinal cord arteriovenous malforma, tions.