(a) Photomicrographs of (a) control, (b) benign breast conditions (BBC), and (c) breast cancer (BC). (d) Evaluation of protein expression in the three different groups. Hypoxia-inducible factor 1-alpha (HIF-1α), insulin-like growth factor 1 receptor (IGF-1R), and vascular endothelial growth factor (VEGF) showed a significant increase in the BC group compared to the group with BBC and the control group. Contrastingly, Von Hippel-Lindau (VHL) showed a significant decrease in the BC group compared to the group with BBC and the control group. Significant value in Kruskal–Wallis and Dunn’s post test (±S.E.M - Standard Error of the Mean; *** p < 0.001 vs. the control group; *** p < 0.001 vs. the BBC group). Magnification of 40×. Bar: 20 μm.