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Differential expression of p53 and p504s in hyperplastic polyp, sessile serrated adenoma and traditional serrated adenoma

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International Journal of Colorectal Disease Aims and scope Submit manuscript

Abstract

Aims

Known collectively as serrated polyps, hyperplastic polyps (HP), sessile serrated adenomas (SSA/SSP) and traditional serrated adenoma (TSA) may represent a spectrum of increasing malignant potential with characteristic immunological markers. There is increasing evidence that HP, SSA/SSP and TSA are biologically different and are likely to represent a spectrum along the serrated polyp pathway. Although there is general consensus about the diagnostic features of serrated polyps, the morphological differences between the categories are often subtle. This study compares the expression of p53 and P504S among serrated polyps. Sixty seven randomly selected biopsies (n = 59) and resection specimens (n = 8) histologically diagnosed for SSA/SSP, TSA and HP (19, 30 and 18 specimens, respectively) were obtained.

Methods and results

There was a significant difference in p53 (P < 0.001) and P504S (P < 0.001) immunopositivity and distribution among the serrated polyps. In particular, there is diffuse expression p53 and P504S in TSA compared to HP and SSA/SSP where p53 and P504S expression was more frequently confined to the lower 1/3 of the crypts. In addition, percentage of cells expressing p53 and p504S expression was higher in TSA than those of HP and SSA/SSP.

Conclusion

Immunostains, p53 and P504S, may be useful adjuncts to morphological diagnosis of serrated polyps.

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Authors and Affiliations

  1. Department of Histopathology, Imperial College London, Hammersmith Campus, Du Cane Road, London, W12 0HS, UK

    Nye-Thane Ngo

  2. Academic Surgical Unit, Imperial College London, Chelsea and Westminster Campus, London, UK

    Emile Tan & Paris Tekkis

  3. Department of Histopathology, Imperial College London, Charing Cross Campus, London, UK

    David Peston & Patrizia Cohen

Authors
  1. Nye-Thane Ngo
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  2. Emile Tan
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  3. Paris Tekkis
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  4. David Peston
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  5. Patrizia Cohen
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Correspondence to Nye-Thane Ngo.

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Sources of support: None declared

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Ngo, NT., Tan, E., Tekkis, P. et al. Differential expression of p53 and p504s in hyperplastic polyp, sessile serrated adenoma and traditional serrated adenoma. Int J Colorectal Dis 25, 1193–1200 (2010). https://doi.org/10.1007/s00384-010-1007-5

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  • DOI: https://doi.org/10.1007/s00384-010-1007-5

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