title: A very large keratin horn of the hand.
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000150:complications*; D006225:Hand; D006801:Humans; D008297:Male; D012871:Skin Diseases / Q000209:etiology*; D012878:Skin Neoplasms / Q000150:complications*