These other three genes are MUC1 (GeneID 4582, cell surface mucin glycoprotein, epithelial membrane antigen) which is elevated in the serum of patients with breast cancer [38]; WFDC6 (HE4) (GeneID 140870) a small serine proteinase inhibitor [39] that is part of a family thought to be a potential OEC marker [40] and LCN2 (GeneID 3934, lipocalin 2, oncogene 24p3) which has been shown to be an epithelial inducer in Ras malignancy and a suppressor of metastasis [41]. Here, LCN2 is linked to breast cancer.