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Distinguishing hepatocellular carcinoma (HCC) from metastatic tumors is a challenging issue, especially in differential diagnosis between poorly differentiated HCC and metastasis tumors. Expression of Arg-1, HepPar-1, and α-fetoprotein (AFP) in 78 cases of HCC, 34 cases of metastatic tumors, and 228 cases of nonhepatocellular tumors of surgical specimens is measured by immunohistochemistry. Arg-1...
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