Pyuria is absent during urinary tract infections in neutropenic patients.

To investigate the diagnostic significance of a normal urine sediment in the work-up for fever of unknown origin in neutropenia. Urinary tract infection was defined as ≥105 urinary pathogens in the absence of another focus. Pyuria was found in only 1/23 neutropenic episodes compared to 21/31 in controls (P < 0.0001). Pediatr Blood Cancer 2011;56:868–870. © 2010 Wiley-Liss, Inc.