Understanding calcinosis cutis.

Calcinosis cutis is the aberrant deposition of insoluble calcified salts in cutaneous tissue that occurs in association with a variety of diseases. A relatively uncommon disorder, it can range in severity from mild to debilitating. This article describes a patient with a long history of dermatomyositis who developed multiple calcific lesions in the extremities that did not respond to conservative therapies and eventually required multiple surgical interventions.