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Prognostic value of KI-67 proliferation index in luminal breast cancers
Şeref Dokcu1, Mehmet Ali-Çaparlar2, Özhan Çetindağ2
1Department of Surgical Oncology, Health Sciences University, Gazi Yaşargil Training and Research Hospital, Diyarbakır.
Aim:
This study aimed to examine the prognostic significance of the KI-67 proliferation index, especially in breast cancer (BC) patients without HER-2 expression and no nodal involvement.
Material And Methods:
The database of hormone-receptor-positive patients who underwent surgery for BC in our Surgical Oncology Clinic between 2008 and 2020 was retrospectively reviewed and recorded. Patients were categorized based on their KI-67 level, considering the cutoff value of 20%.
Results:
Our study revealed that tumors with high KI-67 levels were more likely to have a more advanced histological grade (p = 0.00) and size (p = 0.038). In the univariant analysis, KI-67 level was effective on overall survival (p = 0.044) and disease-free survival (p = 0.048). However, we found that there was no independent prognostic factor in the multivariant analysis.
Conclusion:
Although the Ki-67 proliferation index does not yet have an agreed threshold value and scoring methodology, it can also be used to determine prognosis and evaluate treatment response in some patients.
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