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Immunoexpression of EGFR. (a) Intense expression of EGFR in cell membrane and cytoplasm of adenocarcinoma (Sputum cellblock 40x). (b) Intense expression of EGFR in cell membrane and cytoplasm of adenocarcinoma (Tissue 40x). (c) Diffuse EGFR expression in cell membrane and cytoplasm of squamous cell carcinoma (Sputum cell block 40x). (d) EGFR cell membrane and cytoplasmic expression in squamous cell carcinoma (Tissue 40x)
