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Figure 3: Immunohistochemistry. High power view (×400) of MLH1 stain in a case showing absence of staining in nuclei of tumour epithelium (above dotted line) compared to positive nuclear staining in the adjacent normal epithelium (below dotted line)

Figure 3: Immunohistochemistry. High power view (×400) of MLH1 stain in a case showing absence of staining in nuclei of tumour epithelium (above dotted line) compared to positive nuclear staining in the adjacent normal epithelium (below dotted line)