Metascape analysis of the upregulated genes revealed that “Cytokine-cytokine receptor interaction,” “Natural killer cell mediated cytotoxicity,” “positive regulation of interleukin-23 production,” “NOD-like receptor signaling pathway,” “response to interferon-gamma,” “cellular defense response,” and other inflammatory responses and immune-related pathways are significantly enriched in cluster 2, which might be closely related to the progression and distant metastasis of BC. This evidence concerns the gene IFNG and breast cancer.