OBJECTIVES: I. Examine screening modalities for pulmonary vascular arteriovenous malformation (PAVM) in individuals with endoglin mutations. II. Examine the prevalence of cerebral arteriovenous malformations (CAVM) in individuals with hereditary hemorrhagic telangiectasia (HHT). III. Investigate whether modifier genes exist that determine which individuals with HHT due to an endoglin mutation develop PAVMs and which develop CAVMs. IV. Investigate the frequency of cardiac valve abnormalities in individuals affected with HHT due to an endoglin mutations.
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