Overview

• The presence of white blood cells in urine is referred to as pyuria. This tends to be an indicator of urinary tract infection, though there are several non-infective causes.

• • Causes of Pyuria

  • Infection - urethritis, prostatitis, cystitis, pyelonephritis, tuberculosis
  • Neoplasm - renal, bladder, protate
  • Inflammation - interstitial nephritis, interstitial cystitis, Kawasaki disease, SLE
  • Foreign body - renal calculus, indwelling catheter, ureteric stents
  • Polycystic kidney disease
  • Pelvic irradiation
  • Pregnancy