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Lymph node of moderately differentiated squamous cell carcinoma showing absence of metastatic deposits [H&E stain, (a) ×40, (b) ×100]; the absence of immunopositivity for pan-cytokeratin (AE1/AE3) confirmed the absence of occult metastatic deposits [IHC stain, (c) ×40, (d) ×100]
