Successful treatment of refractory pyoderma gangrenosum with risankizumab in a 57-year-old patient: A case report.

Pyoderma gangrenosum is a neutrophilic dermatosis characterized by rapidly progressing inflammatory skin lesions. It is often associated with underlying systemic conditions, such as inflammatory bowel disease and rheumatoid arthritis. Patients typically present with erythematous papules and pustules that rapidly evolve into painful ulcers, most commonly affecting the lower extremities.