We extracted 15 genes (ALOX15B, CEL, UBE2L6, ABCD1, HSPH1, PTGDS, NDUFAB1, ALDH3A1, ADH6, ACSL1, PSME1, NUDT19, ACSL5, RDH16, and IL4I1) with prognostic impact on breast cancer patients, and these genes have been studied in the relevant literature. The gene discussed is IL4I1; the disease is breast cancer.