Comparative Study of Chemoradiation and Sequential Chemoradiation About Lung Adenocarcinoma Patients With Postoperative in pN2

Inclusion Criteria:

* Clinical diagnosis of Lung adenocarcinoma
* Postoperative staging pN2 period
* Voluntary participation and informed consent
* Age ≥ 18 years old, male or female, within six months of weight loss of less than 10%, can tolerate radiotherapy
* performance status( PS) score 0-2.
* Hemoglobin ≥ 80 g / L, white blood cell ≥ 4 × 109 / L, platelets ≥ 100 × 109 / L.
* Liver function: alanine aminotransferase (ALAT), aspartate transaminase (ASAT) \<upper limit of normal (ULN) of 1.5 times, bilirubin \<1.5 × ULN.
* Renal function: serum creatinine \<1.5 × ULN.
* Compliance, and can be regular follow-up, voluntary compliance with study requirements

Exclusion Criteria:

* Do not meet the inclusion criteria
* There is evidence of distant metastases
* Suffered from other malignancies in five years
* Within the past January subjects received other drug trials
* Having serious allergies or idiosyncratic persons, such as you can not use folic acid, dexamethasone, vitamin B12 patients
* Severe lung or heart disease, a history
* Refuses or is unable to sign informed consent to participate in trials
* The abuse of drugs or alcohol addicts.
* Patients with difficult to control bacterial, viral, fungal infections
* Having a personality or mental disorders, without civil capacity or restricted civil capacity.
* Being pregnant or lactating women.