In patients with lung metastases, CD3 in TC (r = 0.365, p = 0.006) and in IM (r = 0.395, p = 0.004) as well as CD8 in TC (r = 0.349, p = 0.008) and in IM (r = 0.455, p = 0.001) all moderately correlated with CD8 density of IM in corresponding primary tumours. The gene discussed is CD8A; the disease is neoplasm.