How often is the skin involved in sarcoidosis?

The skin is involved in 20% to 35% of patients. These findings may be divided into specific and nonspecific lesions. Specific lesions demonstrate sarcoid granulomas on histology, while nonspecific lesions demonstrate some other reactive change.

Lodha S, Sanchez M, Prystowksy S: Sarcoidosis of the skin: a review for the pulmonologist, Chest 136:583–596, 2009.