[Purpura--an unusual presentation of Takayasu arteritis].

Takayasu arteritis is an uncommon vasculitis, often referred to as aortic arch syndrome. It is most prevalent in young women. Physical findings such as the combination of pulseless arms and carotid bruits suggest the diagnosis. Associated skin manifestations such as pyoderma gangrenosum and erythema nodosum have been described. We present a 27-year-old woman with diffuse purpuric eruption and Takayasu arteritis. This appears to be the first description of such an association.