In the CHINOREC trial, 50 rectal cancer (RC) patients receiving neoadjuvant CRT with ipilimumab (IPI) and nivolumab (NIVO) were prospectively monitored for myotoxicity biomarkers, including creatine kinase (CK) and cardiac troponins (cTnT, cTnI). This evidence concerns the gene TNNT2 and rectal cancer.