Plaque-type intertriginous cutaneous calcification.

Cutaneous calcification is classified into four types: dystrophic, idiopathic, tumoral, and metastatic. We present a patient with systemic lupus erythematosus undergoing hemodialysis who noted large plaque-like cutaneous calcifications in the axillae and groin. Some plaques occurred in association with striae related to prior corticosteroid therapy for the patient's underlying systemic disease. This case is unusual because of the clinical presentation, its demonstration of both dystrophic and metastatic types of calcification, and histologic calcification of elastic fibers simulating pseudoxanthoma elasticum.