Might radiation therapy in addition to chemotherapy improve overall survival of patients with non-oligometastatic Stage IV non-small cell lung cancer?: Secondary analysis of two prospective studies

The role of radiation therapy in addition to chemotherapy has not been well established in nonoligometastatic Stage IV non-small cell lung cancer (NSCLC). We aimed to investigate overall survival (OS) of nonoligometastatic Stage IV NSCLC treated with chemotherapy with concurrent radiation to the primary tumor.