We discovered that genes co-expressed with CCDC167 also affected immune- and ubiquinone-related pathways, including “immune response antigen presentation by MHC class I”, “immune response interferon (IFN)-alpha/beta signaling via phosphatidylinositol 3-kinase (PI3K) and nuclear factor (NF)-κB pathways”, and “ubiquinone metabolism” in breast cancer. Here, CCDC167 is linked to breast cancer.