A 60-year-old man was referred for closure of an 18-month, recurrent, nonhealing ulcer in the anterior medial aspect of his left leg over a burn scar from a gasoline fire experienced when the patient was 5 years of age. He said that the ulcer commenced after an abrasion in a motorcycle accident 18 months before. On examination, the lesion measured 10 × 5 cm, the borders were erythematosus, and the wound was foul smelling and painful (Figure).
A. Venous stasis ulcer.
B. Pyoderma gangrenosum.
C. Foreign body abscess.
D. Marjolin ulcer.