In the previous study of MYCN‐amplified retinoblastoma, a lower frequency of copy number changes in four genes characteristic of retinoblastoma (KIF14, DEK, E2F3, and CDH11) was observed in RB1+/+MYCN‐amplified compared to RB1−/− tumors 2. The gene discussed is CDH11; the disease is retinoblastoma.