CDP138 was unravelled to enhance radiosensitivity in lung cancer cells by increasing γ‐H2AX foci in CDP138‐depleted lung cancer cells after exposure to radiation,33 and γ‐H2AX has been regarded as a useful marker of cellular radiosensitivity after single and fractionated irradiation in vivo.34 This evidence concerns the gene H2AX and lung carcinoma.