We have also evaluated the correlation between the ΔNp73 mRNA levels in tissue and these proteins levels in plasma from patients with cancer (n = 6) and subjects with premalignant lesions (n = 17), obtaining a potential correlation for BDNF (r = 0.464 for patients with cancer and r = 0.552 for subjects with premalignant lesions) and for EMAP‐II (r = −0.813 for patients with cancer). This evidence concerns the gene BDNF and cancer.