MUC expression in hyperplastic and serrated colonic polyps: lack of specificity of MUC6

The American Journal of Surgical Pathology
Joanna A GibsonRobert D Odze


Previous studies have shown that hyperplastic and serrated polyps of the colon show variable degrees of gastric and intestinal differentiation. MUCs are a class of approximately 20 genes that encode high-molecular-weight glycoproteins, or mucopolysaccharides, that are widely expressed in epithelial cells and show organ specificity. The role of MUC in serrated carcinogenesis is unknown. One previously published study suggested that expression of MUC6 is specific for sessile serrated adenoma/polyps (SSA/Ps) and thus can be used to distinguish these lesions from hyperplastic polyps (HPs). However, data from our group suggest that MUC antibodies are not reliable in this differential diagnosis. The aims of this study were to systematically evaluate the expression of MUCs in serrated colon polyps and to determine the efficacy of MUC expression in differentiating HPs from SSA/Ps specifically. Routinely processed specimens from 182 serrated polyps [58 HPs, 46 SSA/Ps, 59 SSA/Ps with dysplasia (SSA/P-D), 19 traditional serrated adenomas, and 38 conventional tubular or tubulovillous adenomas (CAs)] were immunohistochemically stained with MUC1, MUC2, MUC5AC, and MUC6, and scored for extent, intensity, and location of staining within the po...Continue Reading


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Related Concepts

MUC6 protein, human
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