Abstract: Objective To investigate the levels of the transforming growth factor-β１(TGF β１) in serum and the relationship with CEA and tumor stage in order to detect the role of TGF β１ in patients with colorectal carcinoma. Methods Serum levels of TGF β１ were measured using an enzyme-linked immunoabsorbent assay in 50 consecutive patients with the colorectal and compared with the ones in 30 healthy volunteers. Results Serum levels of TGF β１ in patients with colorectal carcinoma(40.36+17.60ng/ml) were significantly...