We mined published microarray data (1) to understand the most significant gene expression differences in the tumors of triple negative breast cancer patients based on survival following treatment: dead or alive. We observed significant transcriptome-wide differential expression of serpin peptidase inhibitor, clade B (ovalbumin), member 9, encoded by SERPINB9 when comparing the primary tumors of triple negative breast cancer patients dead or alive. Importantly, SERPINB9 expression was correlated

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... with recurrence-free survival in basal subtype breast cancer, a molecular subtype sharing significant overlap with triple negative breast cancer. SERPINB9 may be of relevance as a biomarker or as a molecule of interest in understanding the etiology or progression of triple negative breast cancer.