ERBB2 and neoplasm: Moreover, we failed to correlate the expression levels of miR-155 with other clinical parameters including tumor size (p = 0.0665, Kruskal-Wallis test), nodal status (p = 0.1421, Mann Whitney test), HER2 overexpression (p = 0.1238, Mann Whitney test) and molecular subtype (p = 0.3335, Kruskal-Wallis test).