In terms of toxicity, most toxicities observed in our study were grade 1 to 2, which is consistent with other studies on RT for IVCTT.[6–10] An increase in CP score of ≥2 was confirmed in 2 patients at 2 and 3 months after the end of RT, but thereafter decreased; hence, the likelihood of radiation-induced liver disease seemed to be low. The gene discussed is CP; the disease is liver disorder.