SERPINB5 and neoplasm: Estrogen receptor 1, alpha (Esr1), a nuclear hormone receptor involved in the regulation of eukaryotic gene expression that affects cellular proliferation and differentiation in target tissues, also was highly expressed, whereas known tumor suppressors cyclin-dependant kinase 1A (Cdkn1a/p21), serine peptidase inhibitor (serpin b5), and oncogenes such as Met proto-oncogene (Met), and protein kinase C, alpha (Prkca) were underexpressed in the tumor.