In addition to the multiple spots of erythema, fast-flow lesions such as arteriovenous malformation (AVM) or arteriovenous fistula (AVF) as well as hypertrophic syndromes such as Sturge-Weber syndrome (SWS) and Parker-Weber syndrome (PKWS) were also documented in families with a RASA-1 mutation [5, 9]. Here, RASA1 is linked to arteriovenous hemangioma/malformation.