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Stewart-Bluefarb syndrome following traumatic arteriovenous malformation.

Stewart-Bluefarb syndrome is a rare angioproliferative disorder that presents as violet plaques on the extremities, due to an underlying arteriovenous malformation (AVM). We report the case of a 12-year-old boy who developed a traumatic AVM in a bicycle accident and presented seven years later with exophytic, violet plaques. This is the first instance of a traumatic AVM preceding Stewart-Bluefarb syndrome in a pediatric patient in the literature. Given the typically long period required to establish this diagnosis, it is crucial for clinicians to actively interrogate a history of preceding trauma in patients presenting with acroangiodermatitis.