Department of Radiation Oncology;
national cancer center/Cancer Institute & Hospital;
Chinese Academy of Medical Sciences & Peking Union Medical College;
Beijing 100021;
China;
Department of Special Medical Services & department of radiation oncology;
national cancer center/Cancer Institute & Hospital;
Chinese Academy of Medical Sciences & Peking Union Medical College;
Beijing 100021;
China;
Combined small cell lung carcinoma; diagnosis; prognosis; multimodality therapy;