Fig 1: Levels of serum S100 calcium-binding protein A10 (S100A10) and three tumour markers in the three groups of study participants: patients with lung cancer (n = 82), patients with benign lung nodules (n = 21) and healthy control subjects (n = 50). (a) S100A10; (b) carcinoembryonic antigen (CEA); (c) cytokeratin 19 fragment (Cyfra21-1); (d) squamous cell carcinoma antigen (SCC). The colour version of this figure is available at: http://imr.sagepub.com.