Role of Ki67 in predicting resistance to adjuvant tamoxifen in postmenopausal breast cancer patients
Joint Authors
Sabir, Majdi M.
Ali al-Din, Nilli Hasan
Ismail, Yahya M.
al-Zawahiri, Hibah M.
Mukhtar, Nadiyah M.
Zayn al-Din, Ahmad A.
Source
Journal of the Egyptian National Cancer Institute
Issue
Vol. 25, Issue 4 (31 Dec. 2013), pp.181-191, 11 p.
Publisher
Cairo University National Cancer Institute
Publication Date
2013-12-31
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Topics
Abstract EN
Introduction : breast cancer (BC) is a major health problem in Egypt and worldwide.
Its prognosis depends not only on tumor stage but also on tumor biology.
Aim : to correlate the expression of Ki67 with the clinical outcomes of early hormone-receptor positive postmenopausal BC patients who are receiving tamoxifen.
Methods : this cohort study included 70 patients.
They were followed up for a minimumof 2 years.Ki67 was assessed on paraffin-embedded blocks using immunohistochemistry methods.
Results : the median Ki67 value was 22.5 % (IQR, 10 %–50 %).
Ki67 was significantly higher in patients with HER2 positive tumors compared to HER2 negative tumors.
After a median follow up period of 53 months, 22 patients (31 %) developed disease recurrence either loco-regional or distant in 5.7 % and 30 % respectively.
Recurrent patients had significantly higher tumor stage, nodal stage andKi67 values compared to non-recurrent cases.
The 2-, 3- and 5-year overall survival (OS) and disease-free survival (DFS) rates were 100 % & 91 %, 98 % & 84 % and 77 % & 59 %, respectively.
DFS was significantly worse with higher TNM stage, lower ER expression and higher Ki67 values.
OS was significantly worse in patients with Ki67 valuesP30 %.
Ki67P30% was an independent predictor of recurrence, poor DFS and OS.
Conclusion : High Ki67 expression is predictive of poor prognosis and of resistance to adjuvant tamoxifen therapy in postmenopausal BC.
We recommend considering Ki67 as one of the risk factors that guide adjuvant treatment decisions.
American Psychological Association (APA)
al-Zawahiri, Hibah M.& Sabir, Majdi M.& Mukhtar, Nadiyah M.& Zayn al-Din, Ahmad A.& Ismail, Yahya M.& Ali al-Din, Nilli Hasan. 2013. Role of Ki67 in predicting resistance to adjuvant tamoxifen in postmenopausal breast cancer patients. Journal of the Egyptian National Cancer Institute،Vol. 25, no. 4, pp.181-191.
https://search.emarefa.net/detail/BIM-347875
Modern Language Association (MLA)
al-Zawahiri, Hibah M.…[et al.]. Role of Ki67 in predicting resistance to adjuvant tamoxifen in postmenopausal breast cancer patients. Journal of the Egyptian National Cancer Institute Vol. 25, no. 4 (Dec. 2013), pp.181-191.
https://search.emarefa.net/detail/BIM-347875
American Medical Association (AMA)
al-Zawahiri, Hibah M.& Sabir, Majdi M.& Mukhtar, Nadiyah M.& Zayn al-Din, Ahmad A.& Ismail, Yahya M.& Ali al-Din, Nilli Hasan. Role of Ki67 in predicting resistance to adjuvant tamoxifen in postmenopausal breast cancer patients. Journal of the Egyptian National Cancer Institute. 2013. Vol. 25, no. 4, pp.181-191.
https://search.emarefa.net/detail/BIM-347875
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 189-191
Record ID
BIM-347875