We identified the <i>BRCA1</i> pseudogene (<i>BRCA1P1</i>), a fusion pseudogene derived from the <i>BRCA1</i> tumor suppressor and <i>RPLP1</i> ribosomal protein genes, as an immunoregulatory RNA in breast cancer. This evidence concerns the gene BRCA1P1 and breast carcinoma.