The study is a prospective, single-center, open-label, single-armed, phase II clinical trial. Clinical staging is determined according to the routine protocol, which include enhanced chest CT scans, brain MRI or CT, bone scintigraphy, abdominal ultrasonography and cardiopulmonary tests. PET/CT scan was optional. Preoperative diagnoses of lymph node metastasis were performed using enhanced chest CT or PET/CT. Preoperative pathological diagnosis is confirmed by electronic fiber bronchoscopic biopsy, CT-guided percutaneous lung puncture biopsy and endobronchial ultrasonography （EBUS/EUS） when necessary.~Patients are going to receive two cycles of pemetrexed 500mg/m2 day 1 and cisplatin 75mg/m2 day 1 (or 25mg/m2 day 1-3), 21 days per cycle. Treatment cycles are repeated every 21 days. Following two cycles of chemotherapy, the same radiological examination as baseline chest CT or PET/CT scans are repeated for tumor response evaluation. Radiographic response was recorded by Response Evaluation Criteria in Solid Tumors （RECIST 1.1）. Patients undergo complete resection between 2 and 6weeks following the last dose of chemotherapy. The surgical extents left to the discretion of the general thoracic surgeon. And lobectomy and pneumonectomy with mediastinal lymph node dissection are recommended. Two cycles of post-surgery pemetrexed/cisplatin treatment will be administrated subsequently.~The primary objective is to determine the radiological response rate (RR) of 2 cycles of neoadjuvant chemotherapy with pemetrexed and cisplatin in patients with resectable stage II and IIIA lung adenocarcinoma. The radiological response rate is measured 3 to 4 weeks after the second cycle of chemotherapy according to the RECIST criteria 1.1.~The secondary objectives are to determine the pathological response rate, safety, the clinical feasibility rate, the drug delivery, 2-year disease free survival (DFS) and 2-year overall survival (OS).The pathological response rate is investigated by determination of the type and extent of vital tumor tissue and tumor necroses as well as reactive alterations with foam cell reaction and fibrosis or scar formation on light microscopic evaluation of surgical resection specimens stained with H&E.The clinical feasibility is achieved if 1) no death due to cancer, toxicity or comorbidity,and 2) no toxicity events including Grade 4 neutropenia >7 days; febrile grade 3/4 neutropenia; grade 4 thrombocytopenia >7 days or any grade with bleeding; grade 3/4 nonhematologic toxicity related to chemotherapy (except nausea/vomiting/hair loss) are observed. The drug delivery is defined as the accomplishment of the chemotherapy.DFS is measured from the date of operation until the date of first progression or recurrence. OS is measured from the date of operation until the date of death from NSCLC or the date last seen alive.
The study is a prospective, single-center, open-label, single-armed, phase II clinical trial. The aim of the study is to evaluate the radiological response rate (RR) of 2 cycles of neoadjuvant chemotherapy with pemetrexed and cisplatin in patients with resectable stage II and IIIA lung adenocarcinoma.