The nature of malignant transformation in a chronic ulcer.
D002294:Carcinoma, Squamous Cell / Q000209:etiology*; D006801:Humans; D007866:Leg; D007871:Leg Ulcer; D012871:Skin Diseases; D014456:Ulcer
CARCINOMA, EPIDERMOID/etiology and pathogenesis; LEG/ulcers