CD8A and neoplasm: To assess the relationship between the proportion of senescent CD8+ T cells and the presence of a malignancy, immune phenotyping of senescent CD8+ T cells was performed by flow cytometry on whole-blood samples from 282 patients with NSCLC for which tumor stage was available (n = 42 stage IA-IIIA NSCLC; n = 240 stage IIIB-IV NSCLC) and 31 healthy volunteers.