Abstract. Systemic inflammatory response, which represents the presence of cachexia, is observed often in patients with lung cancer. To evaluate the prognostic significance of the presence of a systemic inflammatory response in small cell lung cancer (SCLC) patients, a retrospective study using modified Glasgow prognostic Score (mGPS) was performed. This score is composed of serum albumin and C-reactive protein levels. All the patients with SCLC who were diagnosed in Tsukuba