Immunohistochemical profiling of mucins in sinonasal adenocarcinomas
2019
Abstract In this study we investigated the expression of mucins (MUC1, MUC2, MUC4, MUC5AC and MUC6) in a series of 66 sinonasal adenocarcinomas, in order to establish their distribution and the possible correlation with clinicopathological and prognostic parameters. The series included 51 intestinal type adenocarcinomas, 4 non-intestinal type adenocarcinomas, and 11 salivary gland type carcinomas. The immunohistochemical analysis was conducted on a tissue microarray obtained from formalin fixed-paraffin embedded tumor tissue samples. Thirty-nine adenocarcinomas (59.1%) resulted positive for MUC1, 21 (41.2%) for MUC2, 47 (71.2%) for MUC4, and 16 (24.2%) for MUC5AC, while MUC6 was negative in all cases tested. MUC1 was significantly more expressed in ITACs than in non-ITACs (70% vs 20%, p = 0.0007) while MUC2 was expressed only in ITACs (p = 0.0015) with a clear prevalence in the mucinous subtype (p
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