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Representative stainings of the patients with MSI-low CCA (Pat ID 121, A–D) and MSI-high CCA (Pat ID 105, F–H). In both patients, no loss of expression was found for PMS2 (A,E), MLH2 (B,F), MLH1 (C,G), and MSH6 (D,H). Magnification: 40×, scale bar: 75 μm.
