Provided no mediastinal lymph node metastases are proven by echoendoscopy, all patients will subsequently undergo surgical staging. Patients without tissue proof of mediastinal nodal disease at surgical staging will undergo a thoracotomy with systematic lymph node dissection. Provided mediastinal lymph node metastases are proven by echoendoscopy, the patient goes off study protocol and can further be assessed/treated according to local clinical practice.
