TMSB4X and neoplasm: The association between tumor angiogenesis and the levels of Tβ4 and AcSDKP has been studied by Wdzieczak-Bakala et al. (1990), and these authors have proposed that high levels of Tβ4 and AcSDKP are linked to tumor progression in hematologic malignancies (Liu et al., 2006, 2008, 2009a, 2010).