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Aberrant expression of an “intestinal marker” Cdx2 in pyloric gland adenoma of the gallbladder

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Abstract

The aim of this study was to survey Cdx2 expression in pyloric gland adenoma (PGA) of the gallbladder. We reviewed 29 PGA cases, ten (34.4%) and seven (24.1%) of which showed intestinal metaplasia (IM) and squamous morule (SM), respectively. The immunostaining for Cdx2, beta-catenin, MUC5AC, MUC2, MUC6, and M-GGMC-1 was performed and scored (0 = negative, 1+ = <10%, 2+ = 10% to <30%, 3+ = 30% to <50%, 4+ = 50% to <70%, 5+ = 70–100%). Although its scores were relatively low (1+ or 2+), Cdx2 was frequently expressed in 27 cases (93.1%). Not only goblet and/or Paneth cells were positive but also non-IM cells in PGAs, as opposed to the lack of staining in the background mucosa. Cdx2 scores were not correlated with those of IM (p = 0.485) and MUC2 (p = 0.868). Of note, Cdx2 was positive in foci of SM in all seven cases, and there was a significant difference in Cdx2 scores between PGAs with and without SM. Furthermore, the p value of scores between Cdx2 and beta-catenin was 0.051, and both mean labeling indices (LIs) were correlated (r = 0.736). With Cdx2, higher morular LIs than glandular LIs were observed (p = 0.001). Finally, we concluded that aberrant Cdx2 expression in PGAs is closely associated with nuclear beta-catenin expression and SM in contrast with IM.

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Acknowledgements

The authors thank Mr. Hironori Kajitani and Ms. Akemi Minamimoto for their technical support. They also thank Mr. Yoshiharu Yamamoto, Clinical Research Center, Kurashiki Central Hospital, for providing assistance with the statistical analyses.

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The authors have no conflict of interest to declare.

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Authors and Affiliations

  1. Department of Pathology, Kurashiki Central Hospital, Kurashiki, Okayama, Japan

    Yoji Wani & Kenji Notohara

  2. Department of Pathology, Himeji Red Cross Hospital, Himeji, Japan

    Masayoshi Fujisawa

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  1. Yoji Wani
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  2. Kenji Notohara
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  3. Masayoshi Fujisawa
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Correspondence to Yoji Wani.

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Wani, Y., Notohara, K. & Fujisawa, M. Aberrant expression of an “intestinal marker” Cdx2 in pyloric gland adenoma of the gallbladder. Virchows Arch 453, 521–527 (2008). https://doi.org/10.1007/s00428-008-0680-z

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  • DOI: https://doi.org/10.1007/s00428-008-0680-z

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