Cutaneous horn.
Graham
R
R
D002294:Carcinoma, Squamous Cell / Q000209:etiology*; D005148:Facial Dermatoses / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D007642:Keratosis / Q000150:complications / Q000175:diagnosis*; D011230:Precancerous Conditions / Q000175:diagnosis*; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000209:etiology