PTHLH and breast carcinoma: The up-regulation in PTHrP expression was 2-fold higher in the mesenchymal-like phenotype cells (5.7 ± 1.2, p ≤ 0.01) than in epithelial cells (3.4 ± 0.4, p ≤ 0.01 – Additional file 1: Figure S4) from breast carcinoma luminal B tissues.