title: [Aromatase inhibitors in the therapy for breast cancer].
abstract: BACKGROUND
  Endocrine therapy plays a key role in the treatment of breast cancer. Because of high efficacy and low toxicity, endocrine therapy is the first-line treatment of advanced pre- as well as post-menopausal breast cancer. In the adjuvant setting, endocrine therapy has a more profound effect on survival compared to chemotherapy in postmenopausal women harboring receptor positive tumors.
  The introduction of the novel third-generation aromatase inhibitors is the most important improvement in endocrine therapy since the introduction of tamoxifen 20 years ago. Thus, phase III studies have shown improved efficacy of these compounds compared to conventional therapy at relapse. Based on preliminary results from large phase III studies, aromfase inhibitors are now to be implemented as adjuvant therapy for postmenopausal women.
  
  
  CONCLUSIONS
  The uncertainties relate to which drug should be used, regimen (monotherapy or sequential treatment with tamoxifen), and potential toxic effects related to long-term oestrogen deprivation.
authors.affiliation: Seksjon for onkologi, Institutt for indremedisin, Det medisinske fakultet, Universitetet i Bergen, Haukeland Universitetssjukehus, 5021 Bergen per.lonning@helse-bergen.no
authors.forename: Per Eystein
authors.initials: PE
authors.lastname: Lønning
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D047072:Aromatase Inhibitors / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy*; D017024:Chemotherapy, Adjuvant; D017326:Clinical Trials, Phase III as Topic; D005260:Female; D006801:Humans
chemical_list: D000970:Antineoplastic Agents; D047072:Aromatase Inhibitors