Microarteriovenous malformations.
Microarteriovenous malformations (micro-AVMs) are a subgroup of brain AVM with a nidus diameter of less than 1 cm. Although many micro-AVMs may appear angiographically occult on cursory review, careful analysis will often reveal a subtle diagnostic feature. Micro-AVMs present with intracranial hemorrhages that are generally large and associated with significant neurologic impairment. An awareness of these lesions as a possible source of hemorrhage in a young person is critical. In general, micro-AVMs are eminently resectable lesions and patient outcome is determined primarily by the hemorrhage that brings them to medical attention.
Neurosurgical Service, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA.
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Stiver
D002533:Cerebral Angiography; D002543:Cerebral Hemorrhage / Q000209:etiology; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D016896:Treatment Outcome