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Neutrophil/lymphocyte ratio (NLR) is an indicator of systemic inflammation and has been proven to be associated with an increased risk of extravesical disease, decreased cancer specific survival and overall survival in bladder cancer patients. A large proportion of healthy African Americans have a WBC count that is persistently lower than the normal range defined for individuals of European ancestry, this condition has been called "benign ethnic neutropenia". The purpose of our study was to determine if NLR was different in patients of African ancestry (AA) vs European ancestry (EA) across different tumor grades and stages at the time of transurethral resection of bladder tumor(s) (TURBT). Materials and Methods: The records of consecutive patients who underwent TURBT were reviewed from the University of Wisconsin and the Atlanta Veterans' Administration Medical Center (2000-2012). NLR was compared across tumor stage, tumor grade and ethnicity. Results: 297 consecutive patients met study criteria. 89% and 86%, were males and of European ancestry (EA) respectively. NLRs were different across T-stages (Ta-2.5, T1-3.9, T2-3.8; p  = 0.001). but not across tumor grades in Ta (LG-2.5 vs HG-3.9, p  = 0.57). EA had higher NLRs than AA (3.4 vs 1.9; p  &lt; 0.001). Conclusions: Higher NLRs appear to be associated with more advanced tumor stage at the time of TURBT. Patients of African ancestry have lower NLRs across all tumor stages compared to patients of European ancestry. Ethnicity should be taken into account when interpreting the NLR in patients with bladder cancer.

bladder cancer

Neutrophil to Lymphocyte Ratio (NLR) at the Time of Transurethral Resection of Bladder Tumor: A Large Retrospective Study and Analysis of Racial Differences