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Immunohistochemical staining for IGF-IR and activated IGF-IR in human pancreatic cancers and nonmalignant pancreatic tissues. Paraffin-embedded specimens from human pancreatic cancers and nonmalignant tissues were immunofluorescently stained for IGF-IR and phosphorylated IGF-IR. IGF-IR was expressed in normal ductal epithelium as well as tumor epithelium. However, only tumor epithelium stained positive for phosphorylated IGF-IR.
