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Primary Squamous Cell Carcinoma of the Endometrium Unrelated to Human Papilloma Virus: A Molecular Study

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Pathology & Oncology Research

Abstract

In this paper we report a molecular study of a case of Primary Endometrial Squamous Carcinoma (PESC), in which a Human Papilloma Virus (HPV) infection had been previously excluded by Polymerase Chain Reaction (PCR). The studies performed in an effort to explain the carcinogenesis included immunohistochemical over-expression of p53 and p16 proteins as previously observed in our own papers, plus microsatellite analysis of D10S1765 at 10q23.3 (PTEN) and TP53 at 17p13.1 (P53) as well as the methylation status of the of BRCA1 and p16 promoters using specific PCRs. In this rare malignancy, we found allelic imbalance (AI) at 17p13.1 (P53). Instead, AI at D10S1765 (PTEN) gene was absent. The genetic alteration of p53, with hyper-expression of p53 protein and an absence of abnormalities in the PTEN gene are consistent with the similarities between Uterine Serous Carcinoma (USC) and our case of PESC. The aberrant methylation of both p16 and BCAR1 promoters was not detected in our case. This finding too could imply that ESC is more similar to Uterine Serous Carcinoma than Uterine Endometrioid Carcinoma (UEC). Moreover, the lack of aberrant methylation of p16, which is in accordance with over-expression of p16 immunoreactivity, in the absence of HPV infection may be related to other unknown genetic alterations. In our opinion, it is hard to reach any definite conclusion concerning the carcinogenesis of PESC, because of its rarity and the very few molecular studies reported in the literature. Further studies with more numerous cases and larger molecular analyses are mandatory for this malignancy, to confirm whether it is more closely related to papillary endometrial cancer than to endometrioid carcinoma.

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Acknowledgements

The Authors wish to thank Professor Alex Gillan for his help with the English translation and Mrs Emilia Corradini for technical assistence.

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Authors and Affiliations

  1. Department of Biomedical, Biotechnological & Translational Sciences, Pathological Anatomy & Histology Unit, University of Parma, Faculty of Medicine, via Antonio Gramsci, 14 43126, Parma, Italy

    Giovanna Giordano, Silvia Pizzi, Cinzia Azzoni, Lorena Bottarelli & Tiziana D’Adda

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  1. Giovanna Giordano
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  2. Silvia Pizzi
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  3. Cinzia Azzoni
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  4. Lorena Bottarelli
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  5. Tiziana D’Adda
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Correspondence to Giovanna Giordano.

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Giordano, G., Pizzi, S., Azzoni, C. et al. Primary Squamous Cell Carcinoma of the Endometrium Unrelated to Human Papilloma Virus: A Molecular Study. Pathol. Oncol. Res. 19, 495–499 (2013). https://doi.org/10.1007/s12253-013-9607-3

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