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Immunohistochemical analysis of MLH-1, MSH-2, MSH-6, and PMS-2 protein expression in the DC. The neoplastic cells and the internal control (lymphocytes) are positive (a) for MLH-1 (×40), (b) for MSH-2 (×40), (c) for MSH-6 (×40), and (d) for PMS-2 (×40).
