CA9 and neoplasm: We evaluated the genes that encode vascular endothelial growth factor A (VEGFA, an isoform of VEGF that is crucial for tumor angiogenesis and plays a key role in endothelial cell proliferation, survival, and permeability [7], [10], [12], [16], [32]), angiopoietin-like 4 (ANGPTL4), and carbonic anhydrase 9 (CA9).