Adjuvant Chemotherapy for High Risk Stage I Lung Adenocarcinoma

This is a clinical trial from Eastern Cooperative Thoracic Oncology Project (ECTOP), numbered as ECTOP-1004. Solid subtype, micropapillary subtype, vascular involvement, pleural involvement and low differentiation are high risk factors of post-operative recurrence for early-stage lung adenocarcinoma patients. The purpose of this clinical trial is to determine whether the widely used adjuvant chemotherapy strategy cisplatin/ pemetrexed is more effective than no further treatment for Stage pI lung adenocarcinoma patients with high post-operative recurrence risk - in terms of no dose related toxicities, premature treatment withdrawal or death.