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.
Stiver
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Neurosurgical Service, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA.
D002533:Cerebral Angiography; D002543:Cerebral Hemorrhage / Q000209:etiology; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D016896:Treatment Outcome