An unusual skin lesion in a pediatric patient with Wegener's granulomatosis.

Cutaneous manifestations occur in a significant number of patients with Wegener's granulomatosis (WG); however, the presentation and histopathology of these lesions are highly variable and may present problems in diagnosis. We report the presentation of a single large skin lesion in a pediatric patient with a history of WG and the characterization of this lesion by magnetic resonance imaging (MRI) and histopathology. MRI was helpful in delineating the extent of the lesion, although a skin biopsy was necessary to confirm the diagnosis of the vasculitic nature of the lesion.