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c-Kit and EGFR expression in NSCLC detected using immunohistochemistry and FISH assay. (A) c-Kit-negative NSCLC (magnification, ×200) and (B) c-Kit-positive squamous cell carcinomas cells (magnification, ×200). (C) No amplification of the EGFR and (D) amplification of the EGFR. EGFR, epidermal growth factor receptor; NSCLC, non-small cell lung cancer; FISH, fluorescence in situ hybridization.
