Patterns of Failure in triple negative breast cancer patients in an urban, predominately black population
Abstract Background: We sought to evaluate the comprehensive patterns of failure associated with treatment for triple negative breast cancer (TNBC) at a single urban institution. Methods: A retrospective review of TNBC patients treated from 2005-2015 was conducted. Detailed patient, tumor and treatment characteristics were included. Information on patterns of treatment failure, including local, regional, distant and combinations of these three were collected. Chi-square testing was used to compare variables, while logistic regression with Kaplan-Meier estimate was used to calculate overall survival (OS) and freedom from recurrence (FFR). Results: With a median follow-up of 46 months, 32 (16%) documented failures occurred. Locoregional failures comprised 84% of failure patterns whether isolated or in combination with distant failure. 5-year OS and FFR were 76.4% and 83.8%, respectively. On univariate analysis, treatment failure was associated with insurance type, smoking status, presence of LVSI, clinical detection of tumor, increasing clinical tumor size (>2 cm), and increasing pathologic tumor stage, nodal stage, and overall staging. On multivariate analysis, pathologic nodal staging was the most significant predictor of treatment failure. Conclusion: Our work shows that with modern therapies, treatment outcomes for patients with TNBC are very good. 53% of patients failed in distant and locoregional sites simultaneously, with an additional 34% failing locally only. These results highlight the need for aggressive local therapies in high-risk patients as well as suggest a need for improved follow up care focusing on detecting locoregional failures. Integrated multidisciplinary care is essential in the management of these patients at time of failure. Keywords: Triple negative, breast cancer, failure, patterns, predictors