Numerous bleeding episodes, neurological signs and symptoms, and pulmonary arteriovenous malformations are well documented in reports of families with hereditary hemorrhagic telangiectasia. It is always assumed that these are due to the arteriovenous malformations. We are here reporting a case with positive cerebral angiographic findings of large arteriovenous communications, as well as catheterization data revealing pulmonary ab normalities secondary to the cerebral arteriovenous fistula, but no ab normalities within the pulmonary vasculature itself.
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