CD31 immunohistochemical staining revealed the number of tumor blood vessels (HPF, 10×) in the axitinib group (4.27 ± 0.78/1HPF) and in the control group (9.75 ± 1.65/1HPF) (Unpaired t‐test, p = 0.0128, Figure 2D). Here, PECAM1 is linked to neoplasm.