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Various prognostic indicators have been investigated in neoadjuvant chemotherapy (NAC)-treated invasive breast cancer (BC). Our study examines if lymphovascular invasion (LVI) is an independent predictor of survival in women receiving NAC. We performed a retrospective analysis in 166 women with operable invasive BC who underwent adriamycin- and taxane-based NAC between 2000 and 2013. The presence of LVI was noted in breast excisions following NAC. Associations between progression-free and overall survival and LVI and other clinicopathologic variables were assessed. Median follow-up was 31 months (range 1.4-153 months) with a total of 56 events and 24 deaths from any cause. LVI was found in 74 of 166 patients (45 %). In univariate analysis, the presence of LVI was associated with worse progression-free survival (HR 3.37, 95 % CI 1.87-6.06, p &lt; 0.01) and overall survival (HR 4.35, 95 % CI 1.61-11.79, p &lt; 0.01). In multivariate models adjusting for breast cancer subtype, LVI was significantly associated with a decrease in progression-free survival (HR 3.76, 95 % CI 2.07-6.83, p &lt; 0.01) and overall survival (HR 5.70, 95 % CI 2.08-15.64, p &lt; 0.01). When stratified by subtype, those with hormone receptor or HER2-positive BCs with no LVI had the most favorable progression-free and overall survival. Those with both LVI and triple-negative BC had the worst progression-free and overall survival. LVI is an important prognostic marker and is associated with worse clinical outcome in breast cancer patients receiving NAC.

Lymphovascular invasion is an independent predictor of survival in breast cancer after neoadjuvant chemotherapy