SEMA3F and neoplasm: Sema3F was characterized in several studies as an inhibitor of tumor angiogenesis and as a repulsive factor for endothelial cells [15], [16], [28] and sema3A was also found to function as an inhibitor of VEGF induced angiogenesis and as a repulsive factor for endothelial cells although not as an inhibitor of tumor angiogenesis [17], [19], [29], [30].