Abstract
BackgroundObesity (BMI≥30) may be an etiologic and prognostic factor in inflammatory breast cancer (IBC). We examined the relationship between BMI, pathologic complete response (pCR), and circulating-tumor-cell (CTC) levels in IBC. MethodsCohort included IBC patients diagnosed 2005–2015 who had neoadjuvant chemotherapy during a prospective trial on CTCs and pathologic review describing pCR. Chi-square, logistic regression, and Cox proportional hazards models were used to identify clinicopathologic associations with event-free survival (EFS). ResultsOf 73 patients, 61 (84%) had CTC values, 22 (30%) achieved a pCR, and 39 (53%) were obese. There was no difference between obese and non-obese patients for pCR rates (31% vs. 29%, p = 0.90) or presence of CTCs (23% vs. 26%, p = 0.80). Among non-obese patients, CTCs were associated with worse EFS (HR 11.69, p < 0.01), but among obese patients, there was no difference in EFS between those with and without CTCs. ConclusionsBMI mediates CTCs' prognostic significance in IBC.
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