Squamous epithelioma probably due to tar ointment in a case with psoriasis.
D002294:Carcinoma, Squamous Cell / Q000209:etiology*; D003033:Coal Tar / Q000009:adverse effects*; D006801:Humans; D009824:Ointments; D011565:Psoriasis / Q000628:therapy*
D009824:Ointments; D003033:Coal Tar
CARCINOMA, EPIDERMOID/etiology and pathogenesis; COAL TAR/injurious effects; PSORIASIS/therapy