VEGFA and chronic myelogenous leukemia, BCR-ABL1 positive: Although VEGF is a cytokine that regulates normal hematopoiesis, VEGF can act as an auto-and paracrine stimulator of cell survival and angiogenesis in hematological malignancies such as chronic myelogenous leukemia and chronic lymphocytic leukemia (CLL) [14,15].