[Spontaneous regression of a posterior fossa dural arteriovenous malformation (author's transl)].

A 29-year-old woman was admitted to our hospital because of dizziness, nausea and convulsive seizure. She complained of left sided tinnitus. Neurological examination revealed right homonymous hemianopsia, and systolic murmur on the left retroauricular area. Angiograms revealed a dural AVM in the left posterior fossa. Feeders of AVM were enlarged left occipital artery and middle meningeal artery. Since then she was treated only conservatively, but angiograms performed two years and one month later showed disappearance of the dural AVM. She experienced no head trauma, and no subarachnoidal hemorrhage. She has never been treated by irradiation nor contraceptives. We could find no clear mechanism for the spontaneous regression of the AVM.