A 42-year-old woman with left-side ulcerative colitis (E2 - rectum to splenic flexure) was diagnosed with pyoderma gangrenosum (PG) on a persistent ulcerated wound with peripheral erythema, in the left leg's gemelar surface, associated with tenderness and pain. Due to incomplete response to wound care and oral prednisolone, treatment with infliximab was initiated. As PG remained unresponsive after 12 weeks, the patient was switched to adalimumab with concomitant oral prednisolone. Before the second induction dosage of adalimumab, the refractory PG complicated with a superinfection by 