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Abstract
There is a need for molecular markers that predict biological behavior of adult soft tissue tumors. Elevated levels of osteopontin (OPN) a transformation-linked protein, have been associated with poor survival in many cancers. OPN induces cell migration in cancer cells, in part through activation of the hepatocyte growth factor (HGF) receptor (Met) and its signaling pathway. Met expression has been associated with a poor prognosis in some sarcomas. In a series of 15 patients with adult soft tissue tumors, we found that mRNA levels of OPN (p=0.015), Met (p=0.03) and HGF (p