Fibronectin levels above 280 mg/L can be dangerous, and the normal range for fibronectin is 190 to 280 mg/L. High fibronectin levels are often indicative of the presence of physical disease. Fibronectin is also known as fibronectin. Elevated fibronectin often indicates the presence of early cirrhosis or liver cancer, and may also be elevated in some cases of hepatitis, hypertensive syndrome of pregnancy, and other systems of inflammation, bleeding, ischemia, and repair of tissue damage. Fibronectin is mainly secreted by endothelial cells, hepatocytes, macrophages and fibroblasts, and is widely found in body fluids, cell surfaces and connective tissues, with hemostatic, coagulation, antithrombotic and immunomodulatory effects. Abnormal fiber binding protein results require prompt medical attention for further examination and treatment.