In colon cancer, caspase‐3/7 activation induced by radiotherapy in dying tumour cells activated protein kinase C delta (PKCδ)/Akt signalling and then promoted vascular endothelial growth factor‐A (VEGF‐A) secretion to stimulate surviving tumour cell proliferation and repopulation in vitro and in vivo.10 The gene discussed is PRKCD; the disease is neoplasm.