[The superiorities of invasive procedures in nodal staging of non-small cell lung cancers].

The staging of non-small cell lung cancer is the most important factor that affects the treatment form and prognosis. The management strategy includes serious variations according to clinical condition of the patient, preoperative, intraoperative and postoperative pathologic staging outcomes. Today, obtaining the histopathological diagnosis preoperatively became mandatory. Reaching the definite tissue diagnosis requires the using of invasive technics. Nowadays; there is a widespread use of invasive staging and diagnostic procedures in order to show the evidence of disease presence and determine the probability of contralateral metastasis in a patient who will undergo a possible thoracotomy. In the preoperative period, benefiting from the invasive staging methods that will reveal occult N2 disease totally, would be more useful for the patients.