Figure 2From: Usefulness of Serum Carcinoembryonic Antigen (CEA) in evaluating response to chemotherapy in patients with advanced non small-cell lung cancer: a prospective cohort study Progression free survival in patients who have radiological response and CEA level reduction. A. Kaplan-Meier curve comparing PFS in overall response vs stable/progressive disease. B. Kaplan-Meier curve comparing PFS in patients with a ≥ 14% reduction of CEA levels.Back to article page