Since the BRCA1 and BRCA2 proteins are also involved in the radiation-induced deoxyribonucleic acid (DNA) damage repair and signalling pathway, BRCA1+/− and BRCA2+/− carriers are considered to be at high risk of IR-induced cancer, notably through chest CT scan exams [5, 7, 8]. This evidence concerns the gene BRCA1 and cancer.