title: Failure of etretinate therapy in pachyonychia congenita.
mesh_terms: D002648:Child; D005050:Etretinate / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007645:Keratoderma, Palmoplantar / Q000188:drug therapy*; D009264:Nails, Malformed / Q000150:complications; D013577:Syndrome
chemical_list: D005050:Etretinate