Analysis of The Cancer Genome Atlas (TCGA) breast cancer cohort revealed that breast tumors from more than 50% of patient populations highly expressed SAP30 and RBBP7 mRNAs with few other genetic alterations compared with normal breast tissues (Supplemental Figure 1, A and B; supplemental material available online with this article; https://doi.org/10.1172/JCI168362DS1). Here, SAP30 is linked to breast neoplasm.