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Representative staining for p16 and p15 in a nevus. Nevus was stained for p16 (A and C) and p15 (B and D). Note the uniform, prominent staining seen with p15 and the internal controls of the epidermis and the hair follicle. C and D: Higher magnification contrasts the consistent p15 staining pattern with the classic p16 checkerboard pattern. Original magnification: ×25 (A and B); ×200 (C and D).
