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Immunohistochemical staining of LIF expression in patients with OSCC. LIF expression was determined by immunohistochemistry in paraffin-embedded tumor tissues of patients with OSCC. (A) Representative image of positive LIF staining in a patient with OSCC. The cytoplasmic LIF staining was found in nearly all cancer cells of the tumor nests. (B) Representative image of no LIF staining in a patient with OSCC.
