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Immunohistochemistry of MMR proteins, MGMT, and Ki-67 antigen in 13 medulloblastoma tissues samples. Demonstration of nuclear expression of MLH1 (upper left), MSH2 (middle), MSH6 (upper right), PMS2 (lower left), MGMT (middle), and Ki-67 antigen (lower right) in a medulloblastoma from a 10-year-old girl (chromogen diaminobenzidine, scale bar applies to all pictures).
