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  • Title: Annexin A10 expression correlates with serrated pathway features in colorectal carcinoma with microsatellite instability.
    Author: Kim JH, Rhee YY, Kim KJ, Cho NY, Lee HS, Kang GH.
    Journal: APMIS; 2014 Dec; 122(12):1187-95. PubMed ID: 24909058.
    Abstract:
    Annexin A10 (ANXA10) has recently been identified as a marker of sessile serrated adenomas/polyps of the colorectum. Although the serrated neoplasia pathway is thought to be involved in the majority of microsatellite instability-high (MSI-H) sporadic colorectal carcinomas (CRCs), the clinicopathological implications of ANXA10 expression in CRC are unknown. Here, we evaluated ANXA10 expression status in 168 MSI-H CRCs by immunohistochemistry. Among 168 MSI-H CRCs, nuclear staining for ANXA10 in tumor cells revealed 28 cases (17%) with ANXA10-positive (ANXA10+) tumors. Most of the ANXA10+ tumors were located in the proximal colon (96%, p < 0.001). The ANXA10+ phenotype in MSI-H CRC was significantly associated with female gender (68%, p = 0.016), CpG island methylator phenotype-high (CIMP-H) (68%, p < 0.001), MLH1 promoter hypermethylation (61%, p < 0.001), loss of MLH1 expression (82%, p = 0.019), and wild-type KRAS status (96%, p = 0.023). Survival analysis revealed no prognostic significance of ANXA10 expression in MSI-H CRC. In conclusion, ANXA10+ MSI-H colon carcinomas are characterized by serrated pathway features, including proximal location, female predominance, and high frequencies of CIMP-H status and MLH1 methylation.
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