Conclusion The feature of mediastinal lymph node metastases in lung cancer may be saltatory and multiple.

Objective To evaluate routine mediastinoscopy in detecting mediastinal lymph nodes status in patients with peripheral T1N0M0 non-small cell lung cancer (NSCLC).

MRI in showing lung door and mediastinum lymph gland has important value to shift, which has important direct significance in diagnosing lung cancer by stages and operation.