In particular, clusters 9, 10, 12, 13, 14, 16, 18, 19, 21, 26, 27, 28, 30, 34 and 35 not only expressed ductal cell markers (KRT19, MMP7, TSPAN8, SOX9 and LCN2), but also expressed cancer cell markers (MUC1 and PROM1). The gene discussed is MMP7; the disease is cancer.