FGF2 and breast cancer: BC hydrogel that has been modified with an extracellular matrix, such as hyaluronan, collagen (Col), or elastin and growth factors (GF), including keratinocyte growth factor (KGF), human basic fibroblast growth factor (B-FGF), and human epidermal growth factor (H-EGF), has been able to inculcate these biocompatibility characteristics into BC.