Abstract
Background
To examine the prognostic value of lymphovascular invasion (LVI) in different tumor locations (i.e., renal pelvis and ureter) of upper urinary tract urothelial carcinoma (UTUC).
Methods
Data from a total of 250 patients with nonmetastatic UTUC who received radical nephroureterectomy between 2004 and 2010 at our institution were analyzed retrospectively. The significance of LVI and other relevant factors on cancer-specific survival (CSS), metastasis-free survival (MFS), and intraluminal recurrence-free survival (IRFS) were evaluated.
Results
Lymphovascular invasion was present in 60 patients (24 %) and was related to advanced pathological T stage (P < 0.001), higher tumor grade (P < 0.001), lymph node metastasis (P = 0.005), and pyelocaliceal tumor location (P = 0.002). By Kaplan–Meier analysis, LVI was found to be significantly correlated with worse CSS and MFS but not with IRFS. Multivariate analysis showed that high pathological T stage and regional lymph node involvement were significant prognostic factors for CSS and MFS, and LVI was an independent predictor for MFS (hazard ratio 1.71, 95 % confidence interval 1.00–2.93, P = 0.049). In patients with ureteral tumors, LVI represented the only significant prognosticator for both CSS and MFS in multivariate analysis. The prognostic value of LVI was not observed in pyelocaliceal tumors.
Conclusions
The implication of LVI on prognosis, particularly in ureteral tumors but not in pyelocaliceal tumors, may imply diverse disease characteristics between different tumor locations among UTUC. LVI is essential to identify patients at high risk for metastasis/mortality and can facilitate treatment planning and surveillance strategies, especially in patients with ureteral tumors.
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Acknowledgment
This study was supported by grants from the Kaohsiung Medical University Hospital (KMUH 97-7G06), the Center for Infectious Disease and Cancer Research, Kaohsiung Medical University (KMU-TP103E19), and the Health and Welfare Surcharge of tobacco products, Ministry of Health and Welfare (MOHW103-TD-B-111-05).
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The authors declare no conflict of interest.
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Hsiang-Ying Lee and Ching-Chia Li contributed equally to this article, and both should be considered first author.
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Lee, HY., Li, CC., Huang, CN. et al. Prognostic Significance of Lymphovascular Invasion in Upper Urinary Tract Urothelial Carcinoma is Influenced by Tumor Location. Ann Surg Oncol 22, 1392–1400 (2015). https://doi.org/10.1245/s10434-014-4103-x
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DOI: https://doi.org/10.1245/s10434-014-4103-x