title: Premalignant conditions and causes of skin cancer.
mesh_terms: D001152:Arsenicals / Q000009:adverse effects; D006801:Humans; D009381:Neoplasms, Radiation-Induced; D011230:Precancerous Conditions; D012878:Skin Neoplasms / Q000139:chemically induced / Q000209:etiology*; D013472:Sunlight; D013638:Tars / Q000009:adverse effects
chemical_list: D001152:Arsenicals; D013638:Tars