Cerebral Arteriovenous Malformations

Abstract

FIGURE 13.6. Inferolateral trigonal AVM. AP (A) and lateral (B) vertebral angiograms show an AVM in the inferolateral aspect of the left trigone. Arterial supply was via posterior choroidal branches of the PCA. Postoperative angiogram (C) confirms complete obliteration achieved via inferior temporal gyrus approach. Clinical Neurosurgery • Volume 53, 2006 Cerebral Arteriovenous Malformations FIGURE 13.8. Anterior callosal AVM. AP (A), lateral (B), and oblique (C) views of carotid angiograms show extensive anterior callosal AVM reaching the basal frontoorbital regions and anterior aspect of the hypothalamus. Postoperative lateral angiogram (D) shows complete obliteration. Ba9kaya et al. 132 from superior cerebellar branches. When they reach the fourth ventricle, they invariably get deep transependymal feeders.The more lateral hemispheric cerebellar AVMs, which frequently can be quite large, are generally approached on the lateral position through a retromastoid craniectomy, which FIGURE 13.9. Intraventricular AVM. CT scan (A) shows an intraventricular lesion consistent with an AVM. Note dilated veins in the septal region, tela choroidea, and in the body of the lateral ventricle. AP (B) and lateral (C) carotid; and AP (D) and lateral (E) vertebral angiograms confirm the diagnosis of AVM fed by the ependymal branches of the distal ACA and the medial posterior choroidal branches of the PCA. This AVM was excised via a transcallosal/subchoroidal approach. Postoperative AP carotid (F) and vertebral (G) angiograms show complete obliteration.