Cutaneous sarcoidosis: clinical and pathologic features, molecular pathogenesis, and treatment.

Sarcoidosis is a multisystem inflammatory disorder that most commonly affects the lungs, lymphatic system, eyes, and skin. Cutaneous involvement is present in approximately 20% to 30% patients. Prednisone and corticotropin repository are the only Food and Drug Administration-approved therapies for sarcoidosis. We review the varied cutaneous manifestations of sarcoidosis and the recommended evaluation for this disease. We also discuss histopathologic findings and outline disease pathogenesis, incorporating newer molecular data. Treatment approaches for cutaneous sarcoidosis and their associated levels of evidence are also delineated.