, who described a high-risk oestrogen receptor positive 11q13/14 subgroup of BC comprising a number of genes exhibiting high CN aberrations, including CCND1 [30] In the present study, while high CCND1 CN was most frequent in the Luminal B (HER2−)subtype (20/126 cases), it was also observed among Luminal A tumours (15/284 cases). The gene discussed is CCND1; the disease is breast cancer.