Multi-institutional validation of the predictive value of Ki-67 in patients with high grade urothelial carcinoma of the upper urinary tract
Purpose: We validate the independent predictive value of Ki-67 in patients with high grade upper tract urothelial carcinoma. Materials and Methods: A total of 475 patients from the international Upper Tract Urothelial Carcinoma Collaboration who underwent extirpative surgery for high grade upper tra...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
May 2015
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| In: |
The journal of urology
Year: 2015, Volume: 193, Issue: 5, Pages: 1486-1493 |
| ISSN: | 1527-3792 |
| DOI: | 10.1016/j.juro.2014.11.007 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1016/j.juro.2014.11.007 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0022534714048368 
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| Author Notes: | Laura-Maria Krabbe, Aditya Bagrodia, Ahmed Q. Haddad, Payal Kapur, Dina Khalil, Linda S. Hynan, Christopher G. Wood, Jose A. Karam, Alon Z. Weizer, Jay D. Raman, Mesut Remzi, Nathalie Rioux-Leclercq, Andrea Haitel, Marco Roscigno, Christian Bolenz, Karim Bensalah, Arthur I. Sagalowsky, Shahrokh F. Shariat, Yair Lotan and Vitaly Margulis |
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| 245 | 1 | 0 | |a Multi-institutional validation of the predictive value of Ki-67 in patients with high grade urothelial carcinoma of the upper urinary tract |c Laura-Maria Krabbe, Aditya Bagrodia, Ahmed Q. Haddad, Payal Kapur, Dina Khalil, Linda S. Hynan, Christopher G. Wood, Jose A. Karam, Alon Z. Weizer, Jay D. Raman, Mesut Remzi, Nathalie Rioux-Leclercq, Andrea Haitel, Marco Roscigno, Christian Bolenz, Karim Bensalah, Arthur I. Sagalowsky, Shahrokh F. Shariat, Yair Lotan and Vitaly Margulis |
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| 520 | |a Purpose: We validate the independent predictive value of Ki-67 in patients with high grade upper tract urothelial carcinoma. Materials and Methods: A total of 475 patients from the international Upper Tract Urothelial Carcinoma Collaboration who underwent extirpative surgery for high grade upper tract urothelial carcinoma were included in this study. Immunohistochemical staining for Ki-67 was performed on tissue microarray formed from this patient cohort. Ki-67 expression was assessed in a semiquantitative fashion and considered over expressed at a cutoff of 20%. Multivariate analyses were performed to assess independent predictors of oncologic outcomes and Harrell’s C indices were calculated for predictive models. Results: The median age of the cohort was 69.7 years and 55.2% of patients were male. Ki-67 was over expressed in 25.9% of patients. Ki-67 over expression was significantly associated with ureteral tumor location, higher pT-stage, lymphovascular invasion, sessile tumor architecture, tumor necrosis, concomitant carcinoma in situ and regional lymph node metastases. On Kaplan-Meier analyses over expressed Ki-67 was associated with worse recurrence-free survival (HR 12.6, p <0.001) and cancer specific survival (HR 15.8, p <0.001). On multivariate analysis Ki-67 was an independent predictor of recurrence-free survival (HR 1.6, 95% CI 1.07-2.30, p=0.021) and cancer specific survival (HR 1.9, 95% CI 1.29-2.90, p=0.001). Ki-67 improved Harrell’s C index from 0.66 to 0.70 (p <0.0001) for recurrence-free survival as well as cancer specific survival in our preoperative model, and from 0.81 to 0.82 (p=0.0018) for recurrence-free survival and 0.81 to 0.83 (p=0.005) for cancer specific survival in our postoperative model. Conclusions: Ki-67 was validated as an independent predictor of recurrence-free survival and cancer specific survival in patients treated with extirpative surgery for high grade upper tract urothelial carcinoma in a large, multi-institutional cohort. | ||
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