title: Letters to the editor: Keratoacanthoma treated with methotrexate.
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007636:Keratoacanthoma / Q000188:drug therapy* / Q000473:pathology; D008297:Male; D008727:Methotrexate / Q000627:therapeutic use*; D008875:Middle Aged
chemical_list: D008727:Methotrexate