Pyoderma gangrenosum (PG) is a rare chronic skin disease characterized by painful skin ulcers. There are no treatment guidelines for PG; however, systemic treatment is often administered. Recently, adalimumab (ADA), a fully human monoclonal antibody against tumor necrosis factor, was approved for the treatment of refractory PG in Japan. However, data are limited, and it is not clear whether ADA has the same effect on the treatment of PG in patients with systemic rheumatic disease (SRD), including rheumatoid arthritis (RA). In addition, the glucocorticoid-sparing effect of ADA in SRD patients with PG has not yet been clarified. Herein, we present two successful cases of RA with glucocorticoid-refractory PG on ADA treatment. Our report suggests that ADA may have a glucocorticoid-sparing effect on refractory PG in patients with RA.
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