ERBB2 and neoplasm: The number and diameter of tumour microvessels associated positively with pathological size (IRR [95% CI]: 1.02 [1.01–1.04], p = 0.002) and HER2 negativity (R2 = 0.27, p = 0.01), respectively; no significant correlations were observed with other clinicopathological variables (Supplemental Figs. 1–3).