Sterile Pyuria

Sterile pyuria is a condition where there is the presence of pus cells - i.e. the white blood cells which are produced in response to inflammation - in the urine in the absence of infection (so the urine is sterile). This may be transient and simply the result of inflammation throughout the rest of the body in response to an infection by a virus such as the influenza virus. If it is persistent then an underlying cause must be sought: it can be caused by such things as tuberculosis in the kidney, kidney damage due to diabetes or abuse of pain-killing drugs (called analgesic nephropathy), kidney stones or bladder stones or cancer anywhere in the urinary tract.
 
 
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