Three previous studies identified nuclear localisation of CXCR4 in hepatocellular carcinoma (Shibuta et al, 2002), invasive ductal mammary carcinoma (Kato et al, 2003), and non-small-cell lung cancer (NSCLC) (Spano et al, 2004). This evidence concerns the gene CXCR4 and non-small cell lung carcinoma.