Facial calcinosis cutis in a patient with systemic lupus erythematosus: A case report of tissue injury owing to photosensitivity as the cause of dystrophic calcification

Soft tissue calcification (calcinosis cutis) is a rare disorder with 5 different subtypes: dystrophic, metastatic, idiopathic, iatrogenic, and calciphylaxis.1 Dystrophic calcinosis refers to the deposition of calcium in areas of prior tissue injury in patients with normal serum calcium and phosphorus. Dystrophic calcification has been associated with various connective tissue disorders including dermatomyositis, overlap syndrome, diffuse cutaneous systemic sclerosis, and CREST (calcinosis, Raynaud phenomenon, esophageal dysfunction, sclerodactyly, and telangiectasia) syndrome; however, it is rarely seen in systemic lupus erythematosus (SLE).