HER2 Overexpression in Borderline and Malignant Ovarian Tumors: A Cross-sectional Study in an Iranian Population and Literature Review

Asadinejad, Elham; Abdirad, Afshin; Nili, Fatemeh; Soleimani, Vahid

doi:10.30476/mejc.2018.42142

Document Type : Original Article(s)

Authors

Department of Pathology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran

https://doi.org/10.30476/mejc.2018.42142

Abstract

Background: Different studies have investigated the overexpression of human epidermal growth factor receptor 2 in ovarian cancers, in addition to the association between the level of its overexpression and tumor characteristics (tumor grade, subtype, stage, and prognosis). However, the prognostic significance of human epidermal growth factor receptor 2/neu dysregulation in epithelial ovarian tumors is controversial. The current study aims to assess human epidermal growth factor receptor 2 overexpression in different types and stages of epithelial borderline and malignant ovarian tumors in a population of Iranian patients.Methods: We conducted this cross-sectional study on 100 patients diagnosed with epithelial borderline and malignant ovarian tumors who referred to the Cancer Institute of Imam Khomeini Hospital at Tehran between 2012 and 2014. After selection of the appropriate tissue block, we prepared slides for immunohistochemical staining with the human epidermal growth factor receptor 2 marker. Human epidermal growth factor receptor 2 positivity was evaluated and scored according to Ellis and Wolff recommendations. Cases with equivocal immunohistochemical results (score 2) also underwent chromogenic in situ hybridization.Results: The most prevalent tumor in our study was serous carcinoma (54%). Human epidermal growth factor receptor 2 scores were: 0 in 69%, 1+ in 26%, 2+ in 4%, and 3+ in 1% of tumors. Chromogenic in situ hybridization examination of cases with human epidermal growth factor receptor 2 score of 2 showed negative results for human epidermal growth factor receptor 2 gene amplification. We observed no association between human epidermal growth factor receptor 2 and the level of tumor differentiation, histologic subtype, clinical stage, tumor size, and patient’s age.Conclusion: Controversial results and wide range of prevalence in human epidermal growth factor receptor 2 overexpression in different studies could be due to several causes. Technical considerations, tumor heterogeneity, and lack of standard guidelines for interpretation could influence the results. We did not find any relationship between human epidermal growth factor receptor 2 overexpression and prognostic indices of grade, clinical stage or histologic subtype as many other reports. Future studies should be conducted on larger numbers of patients with different disease stages and adequate numbers of different histologic subtypes.

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Middle East Journal of Cancer

HER2 Overexpression in Borderline and Malignant Ovarian Tumors: A Cross-sectional Study in an Iranian Population and Literature Review

References

References

1. Ferlay J, Soerjomataram I, Dikshit R, Eser S, Mathers C, Rebelo M, et al. Cancer incidence and mortality worldwide: sources, methods and major patterns in GLOBOCAN 2012. Int J Cancer. 2015;136(5):E359-86. doi: 10.1002/ijc.29210.

41. Omar N, Yan B, Salto-Tellez M. HER2: An emerging biomarker in non-breast and non-gastric cancers. Pathogenesis. 2015; 2(3):1-9

Volume 9, Issue 4 - Serial Number 4
39
October 2018
Pages 300-309

HER2 Overexpression in Borderline and Malignant Ovarian Tumors: A Cross-sectional Study in an Iranian Population and Literature Review

References

References

1. Ferlay J, Soerjomataram I, Dikshit R, Eser S, Mathers C, Rebelo M, et al. Cancer incidence and mortality worldwide: sources, methods and major patterns in GLOBOCAN 2012. Int J Cancer. 2015;136(5):E359-86. doi: 10.1002/ijc.29210.

41. Omar N, Yan B, Salto-Tellez M. HER2: An emerging biomarker in non-breast and non-gastric cancers. Pathogenesis. 2015; 2(3):1-9

Volume 9, Issue 4 - Serial Number 439October 2018Pages 300-309

Volume 9, Issue 4 - Serial Number 4
39
October 2018
Pages 300-309