Spontaneous Regression of Cerebral Arteriovenous Malformation in Hereditary Hemorrhagic

are associated with hereditary hemorrhagic telangiectasia (HHT). I report a case of a patient with HHT with four cerebral AVMs in whom one AVM spontaneously regressed during a 5-year period. The spontaneous regression of this AVM in this patient with HHT supports the theory that AVMs associated with this syndrome have a different nat-ural history than that of typical sporadic AVMs. Hereditary hemorrhagic telangiectasia (HHT), also known as Osler-Weber-Rendu syndrome, is a disor-der with an autosomal dominant inheritance pattern that is characterized by mucocutaneous telangiectatic lesions of the skin, mucous membranes, and viscera and by arteriovenous fistulae in the brain, lungs, and gastrointestinal tract (1). Multiple cerebral arterio-venous malformations (AVMs) are associated wit