抄録
Clinical characteristics of 20 patients with arteriovenous malformations of the posterior fossa were investigated. Nineteen of 20 patients presented with intracranial hemorrhage (intra-cerebellar and/or subarachnoid hemorrhage), which was recurrent in 5 cases (26%). One patient demonstrated progressive neurological deficits. AVM located in the cerebellar hemisphere in 10 patients, vermis in 7, tonsil in 1, and brain stem in 2. Four of 20 patients (20%) had concomitant aneurysms relating to the feeding arteries of AVM.
Operative intervention was directed at primary excision in 16 patients, total excision in 14, subtotal excision in 1, and partial excision and feeder clipping in 1. One patient underwent ventricular drainage only. This patient died of recurrent hemorrhage 11 days after the drainage. Three patients did not receive any treatment, and 1 of 3 patients died of pneumonia. Seventeen of 20 patients (85%) had a good result, 1 patient (5%) a poor result, and 2 patients (10%) died. Good results could be expected of surgery in the treatment of AVM localized in the cerebellar hemisphere.
