Leg ulcers that do not heal.
D000368:Aged; D002280:Basal Cell Carcinoma / Q000175:diagnosis; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007871:Leg Ulcer / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D012878:Skin Neoplasms / Q000175:diagnosis*