VEGFA and neoplasm: Due to the species selectivity of bevacizumab (i.e., only the influence of the tumor-derived VEGF would have been inhibited in these experiments, and the mouse stromal cell-derived VEGF would have been unaffected), we also investigated the effect of the small molecule inhibitor of the VEGFR2 receptor sunitinib in an attempt to block all VEGFR signaling.