Abstract:
OBJECTIVE AND IMPORTANCE:Treatment of tentorial dural arteriovenous fistulae (DAVFs) primarily draining into the vein of Galen remains a therapeutic challenge. We present two cases of ruptured galenic DAVFs that were successfully treated with gamma knife radiosurgery. CLINICAL PRESENTATION:Patient 1, a 66-year-old woman, experienced a sudden onset of headache and loss of consciousness. Neuroimaging studies revealed intraventricular hemorrhage and a DAVF with aneurysmal dilation of the vein of Galen. The DAVF was supplied by tentorial branches of the right meningohypophyseal artery and bilateral supracerebellar arteries, which drained directly into the vein of Galen. Patient 2, a 64-year-old woman, experienced subarachnoid hemorrhage. Cerebral angiography revealed a galenic DAVF at the falcotentorial junction, which was supplied by bilateral supracerebellar arteries. This patient had an aneurysm at the origin of the left supracerebellar artery. INTERVENTION:Both patients were treated with gamma knife radiosurgery. In each case, the fistula was exclusively targeted and a dose of more than 20 Gy was delivered. Complete obliteration of the fistula was confirmed 27 and 29 months after radiosurgery for Patients 1 and 2, respectively, whereas the normal venous structures of the galenic system were preserved. CONCLUSION:Gamma knife radiosurgery is an effective treatment modality for DAVFs primarily draining into the vein of Galen. Irradiation doses of more than 20 Gy, strictly limited to the fistulae, seem to be sufficient for successful obliteration of these high-risk vascular lesions, with minimal invasiveness.
journal_name
Neurosurgeryjournal_title
Neurosurgeryauthors
Shin M,Kurita H,Tago M,Kirino Tdoi
10.1097/00006123-200003000-00039keywords:
subject
Has Abstractpub_date
2000-03-01 00:00:00pages
730-3; discussion 733-4issue
3eissn
0148-396Xissn
1524-4040journal_volume
46pub_type
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