SMN1 and acute lymphoblastic leukemia: In contrast, heterogeneous VEGF expression by ALL cells caused the growth of enlarged vessels, characterized by heterogeneous diameters, the presence of multiple lumens and a lack of normal pericytes, substituted by a thick coat of smooth muscle cells expressing both NG2 and SMA, similar to the progressively growing angioma‐like vascular structures previously observed in similar conditions 3, 5, 17.