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Cutaneous squamous cell carcinoma—moderately differentiated. (A). Proliferation of irregular patches and plaques with polygonal squamous cells, exhibiting marked cyto-nuclear atypia with rare occurrences of keratinization. Around the tumor, an abundant, mixed, inflammatory infiltrate is observed. The tumor cells are positive for anti-CK AE1/AE3 antibodies (B) and for anti-p53 antibodies (C).
