Four ferroptosis driver genes FLT3, ALOX12B, ALOX15, and VDAC2, had a low CNV, and four ferroptosis suppressor genes ACSL3, CISD1, FANCD2, and SLC3A2, had a high CNV, indicating that ferroptosis was inhibited in tumor development. The gene discussed is CISD1; the disease is neoplasm.