Fig. 2

Disease Progression after First-line Chemotherapy in ES-SCLC Patients without Pleural Effusion (n = 51). Rates (%) of recurrence patterns based on primary tumor size (≤3 cm vs. >3 cm; 2-1) and the number of metastatic sites (single metastasis vs. multiple metastases; 2-2) at diagnosis are shown. Blue: thoracic progression, Red: metastases to a distant site, Green: metastases to multiple sites including pleural dissemination and carcinomatous lymphangiosis, Purple: not evaluable