Studies have reported that heat shock protein 70 (HSP70) acts as a chaperone for several polypeptides that can generate tumor antigens, which can be represented by MHC molecules14 and elicit CD8+ T cell responses.15 The immunogenic nature of the HSP70‐chaperoned polypeptides (HCP) allows for their novel use in personalized immunotherapy of cancer. The gene discussed is CD8A; the disease is neoplasm.