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Aim: To determine the relationship between established prognostic markers and Ki67 proliferative index in breast cancer patients and investigate variations of prognostic parameters between material types (tru-cut biopsy or resection). Material and Methods: Breast cancer cases reported in our laboratory between July 2015 and December 2019, as well as estrogen receptor (ER), progesterone receptor (PR), CerbB2, Ki-67 staining results, tumor type, histologic grade, tumor size, lymph node metastasis status parameters were obtained from the automation system. Tru-cut biopsy and resection materials were evaluated and the parameters were compared. Results: 726 materials taken from 571 adult patients were included in this study. 297 (40.9%) of the cases were evaluated by tru-cut biopsy and 430 (59.1%) were resection material. The mean ER staining percentage was 86.5 (± 10.36) and it was 61.65 (± 22.84) for PR. Ki-67 proliferative index had an average value of 26.58 (± 17.67). There was no difference between the material types in terms of immunohistochemical markers, whereas there were differences between the two material types in histological grade results.Conclusion: Besides established immunohistochemical prognostic markers, Ki67 proliferative index should be utilized in breast cancer cases and determination of histological grade in tru-cut biopsies is valuable for the clinical management of the tumor. Downloads Download data is not yet available. Article Details How to Cite Tuncel, F., Eda Gokalp Satici, F., Bozkurt, F., Alpaslan Duman, A., & Dag, A. (2021). Clinicopathological features of breast cancer cases and their relationship with immunohistochemical findings . Annals of Medical Research, 27(6), 1715–1721. Retrieved from https://annalsmedres.org/index.php/aomr/article/view/811 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX Issue Volume 27 Issue 6 (2020): June Section Original Articles CC Attribution-NonCommercial-NoDerivatives 4.0

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