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ROENTGENOGRAPHIC ANALYSIS OF ARTERIOVENOUS MALFORMATIONS OF THE OCCIPITAL LOBE

B. TODD TROOST M.D.1 and THOMAS H. NEWTON M.D.

1 NIH Fellow in Neuro-Ophthalmology (Fellowship No. 1 F11 EY 3-01).

Roentgenographic and clinical features of 25 cases of arteriovenous malformations of the occipital lobe are summarized.

Occipital apoplexy and occipital epilepsy are the cardinal syndromes of occipital arteriovenous malformations. The most common presenting sign, however, is a homonymous visual field defect. Size of the malformation does not correlate with presence of visual field defect.

Arteriovenous anomalies of the occipital lobe are supplied by multiple arterial sources, including distal branches of the middle cerebral artery, the posterior cerebral, external carotid, and pericallosal arteries.

Because early excision of occipital hematomas promotes recovery from visual field defects, selective arterial opacification is recommended to delineate these vascular malformations.


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