Preoperative treatment strategies in stage III non-small cell lung cancer.

Recent experience has emphasized the need to include systemic chemotherapy in combined-modality management of locally advanced non-small cell lung cancer stage III. If definitive surgery is planned in these situations, preoperative application of drugs-induction chemotherapy-has many advantages in comparison to postoperative delivery. Patients' compliance to treatment, achievable dose intensities of drugs, possible locoregional downstaging, and frequent postoperative problems following complex resections are some of the arguments favouring preoperative chemotherapy. Despite numerous phase-II investigations, little evidence from randomized phase-III trials has been generated. Early inclusion of radiotherapy prior to definitive resection may help to improve preoperative downstaging. Besides available mature phase-II data, phase-III results from ongoing randomized trials are lacking to define the overall value of such a complex approach. Important issues in the future will aim at individualizing these intensive programs according to findings in clinical prognostic factor analyses and to prospectively validate a prognostic risk stratification. Data from translational and molecular research may further help to develop such evidence-based guidelines.