FGF2 and vascular neoplasm: Rapid vascularization in the vicinity of devices can be promoted by the inclusion of growth factors, such as vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF), to facilitate the controlled release of angiogenic cues and stimulate angiogenesis.[115, 116] Uncontrolled expression of VEGF, however, can lead to abnormal vascular growth and vascular tumors, while short‐term expression leads to unstable vessels, which promptly regress following the removal of the angiogenic stimulus.