Pyoderma gangrenosum after surgery for forefoot deformity in a patient with rheumatoid arthritis: a case report.

Pyoderma gangrenosum (PG) is a rare inflammatory skin disease characterized by skin ulcers that are associated with autoimmune diseases. Although the effectiveness of immunosuppression with glucocorticoids and tumor necrosis factor inhibitors in treating PG has been reported, the utility of negative-pressure wound therapy (NPWT) for severe ulcerative lesions in patients with PG remains controversial. Herein, we report the case of a 76-year-old woman with rheumatoid arthritis who developed PG after undergoing surgery for a forefoot deformity. The patient showed improvement in deep ulcer lesions through NPWT while receiving treatment with abatacept and systemic glucocorticoids. Subsequent topical glucocorticoid therapy led to the remission of the PG. This case suggests that NPWT, when used under immunosuppressive conditions, does not exacerbate the pathergy and may be beneficial for treating severe ulcerative PG.