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Histologic features of K SCC (H&E stained sections). a Low-power image (×100) showing sheets of tumor cells with keratin pearl formation. b Low-power image (×200) showing infiltrative nests of polygonal-shaped tumor cells with abundant, eosinophilic (“mature”) cytoplasm and distinct cell borders. c Low-power image (×200) showing desmoplastic stroma surrounding tumor nests. d High-power image (×600) highlighting intercellular bridges
