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Results of deeply situated intracranial AVM's treated with gamma knife [Deri·n yerleşi·mli· arteri·o-venöz malformasyon olgularinin gamma-knife i·le tedavi· sonuçlari]
(Turkish Society of Cerebrovascular Diseases, 2004) Konya D.; Kiliç T.; Peker S.; Çekirge S.; Baltacioglu F.; Pamir M.N.
Deeply situated intracranial arteriovenous malformations have more mortality and morbidity ratios, as they present anatomical difficulties in surgical approaches. On the other hand, technically, deep location is not a complication increasing factor in radiosurgery. In this prospective study, first 50 patients with deep AVM's who have at least 2 year follow-up after gamma-knife treatment are evaluated. All 50 deep situated AVM's revealed a decrease in their nidus volumes. In 44 (88%) cases AVM oclusion was complete, 4 AVM's (8%) showed 50-80% decrease in their nidus volumes, and 2 other (4%) displayed only venous drainage. Six (12%) AVM cases demonstrated radiological T2 image changes around the AVM nidus, in the normal brain tissue, in 3 (6%) cases these changes caused neurologically permanent deficits. No mortality was detected in the deeply located AVM's and only one intracranial hemorrhage was detected in the latent period.