FN1 and cancer: Fibronectin (FN1 gene encodes fibronectin, a glycoprotein present in a soluble dimeric form in plasma, and in a dimeric or multimeric form at the cell surface and in extracellular matrix) is widely expressed by several cell types and is involved in the migration, proliferation, and adhesion of cells, and in changes of the extracellular matrix through signaling with integrins in several types of cancers [40].