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Metatypical carcinoma (basosquamous). (A). Tegument lined by a keratinized stratified squamous epithelium, exhibiting a tumoral proliferation consisting of two components: a predominantly squamous cell carcinoma component and a basal cell carcinoma component. (B). The tumor cells are positive for anti-CK AE1/AE3 antibodies in the BCC component. (C). The tumor cells are positive for anti-CK AE1/AE3 antibodies in the cSCC component.
