A Rare Case of Subcutaneous Sarcoidosis in Patient With Psoriatic Arthritis.

Sarcoidosis is a multisystem chronic inflammatory disorder of unknown etiology characterized by noncaseating granulomas. 1 In the literature, we found a few cases of sarcoidosis combined with psoriasis and psoriatic arthritis (PsA), in patients treated with anti-tumor necrosis factor inhibitors 2 and secukinumab. 3 However, the coexistence of isolated cutaneous sarcoidosis and PsA is rare. 4,5 .