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KLF4 expression in human cutaneous SCC. A, Tumors showing different KLF4 staining patterns (see Table 1). B, Comparison of staining in tumors with that of adjacent skin. Arrows indicate the DEJ in sections showing epidermis (left), or else the tumor-stromal interface for sections showing tumor cells (right). Arrowheads indicate maturing cells with expression of KLF4. Scale bars, 100μ.
