Indications for chemotherapy in stage IV non-small cell lung cancer.

Treatment of stage IV NSCLC has been a controversial issue during the last decade. However, there is now clear evidence that cisplatin-containing chemotherapy regimens lead to prolonged survival with an increase of the 1-year survival rates at about 10%. New drugs like gemcitabine, the taxanes (paclitaxel, docetaxel), and vinorelbine have shown very promising single-agent activity and have been included into modern combination chemotherapy regimens achieving response rates of 40 to 50% and 1-year survival rates of between 30 and 40%. In comparison to single-agent cisplatin or cisplatin/etoposide as 'standard treatment approaches', most of these modern combinations could demonstrate advantages in terms of response, survival and improved QOL. Patients with favourable prognostic factors are at the moment frequently treated with platinum-based combination chemotherapy often including one of these newer active drugs. Patients with adverse prognostic factors such as elderly or stage IV patients with a reduced performance status are preferably treated with single agents such as gemcitabine, paclitaxel or vinorelbine.