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Morphometric analysis of Ki-67 and p16 expression in laryngeal precursor lesions

  • Laryngology
  • Published:
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Abstract

Laryngeal precursor lesions represent areas of altered epithelium with an increased likelihood for progression to squamous cell carcinoma. The exact molecular mechanisms of malignant transformation of laryngeal mucosa are not completely clear, but are certainly due to deregulation of cell proliferation. To assess the potential value of the p16 and Ki-67 as markers of malignant progression, we undertook a retrospective immunohistochemical and morphometric analysis on biopsy specimens from patients with precancerous lesions in the larynx. Morphometric analysis of samples stained with p16 antibody showed epithelial cell positivity in 29 (100 %) of samples with simple hyperplasia, 31 (100 %) samples with basal/parabasal cell hyperplasia, 23 (88 %) samples with atypical hyperplasia and 20 (95 %) samples with in situ carcinoma. There was a significant difference in percentage of p16-positive cells between samples with simple hyperplasia and samples with in situ carcinoma. Morphometric analysis of samples stained with Ki-67 antibody showed epithelial cell positivity in 27 (93 %) of samples with simple hyperplasia, 30 (97 %) samples with basal/parabasal cell hyperplasia, 26 (100 %) samples with atypical hyperplasia and 18 (86 %) samples with in situ carcinoma. There was a significant difference not only in the percentage of Ki-67-positive cells between samples with simple hyperplasia and samples with in situ carcinoma, but also between samples with simple and basal/parabasal cell hyperplasia. Laryngeal epithelial precursor lesions show significantly opposite patterns in p16 and Ki-67 immunopositivity. Simple hyperplasia on average shows 12 % of Ki-67-positive cells and 46 % of p16-positive cells. In situ carcinoma on average shows 23 % of Ki-67-positive cells and 36 % of p16-positive cells.

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Ethical Committee of Belgrade University School of Medicine approved this work (Morphometric analysis of Ki-67 and p16 expression in laryngeal precursor lesions) for publication.

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Authors and Affiliations

  1. Belgrade University School of Medicine, Belgrade, Serbia

    Bojan Pavlovic, Vojko Djukic, Jovica Milovanovic, Nada Tomanovic, Aleksandar Milovanovic & Aleksandar Trivic

  2. University Clinic of ORL and MFS, Clinical Center of Serbia, Belgrade, Serbia

    Bojan Pavlovic, Vojko Djukic, Jovica Milovanovic & Aleksandar Trivic

  3. Institute of Pathology, Belgrade University School of Medicine, Belgrade, Serbia

    Nada Tomanovic

  4. Institute of Occupational Medicine of Serbia “Dr Dragomir Karajović”, Belgrade, Serbia

    Aleksandar Milovanovic

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  1. Bojan Pavlovic
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  2. Vojko Djukic
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  3. Jovica Milovanovic
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  4. Nada Tomanovic
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Correspondence to Bojan Pavlovic.

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Pavlovic, B., Djukic, V., Milovanovic, J. et al. Morphometric analysis of Ki-67 and p16 expression in laryngeal precursor lesions. Eur Arch Otorhinolaryngol 270, 1405–1410 (2013). https://doi.org/10.1007/s00405-013-2383-6

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  • DOI: https://doi.org/10.1007/s00405-013-2383-6

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