title: Association between asymptomatic inflammatory prostatitis NIH category IV and prostatic calcification in patients with obstructive benign prostatic hyperplasia.
abstract: BACKGROUND
  The aim of this study was to evaluate the incidence of prostatic calcification and prostatitis NIH category IV in patients with obstructive BPH.
  
  
  METHODS
  Ninety-six patients with obstructive BPH who had undergone transurethral electroresection of the prostate gland were evaluated. In accordance with a preoperative transrectal ultrasound examination, patients were divided into one group with prostatic calcification (N.=31) and one without (N.=65). Prostatitis NIH category IV was classified according to the grading system by Irani. Correlations between the incidence of prostatic calcification, histological prostatitis, PSA, uric acid, cholesterol, triglycerides, CRP, IPSS, IIEF-25, and NIC-CPSI were analyzed. A stone analysis of prostatic calcification was performed using X-ray powder diffraction.
  
  
  RESULTS
  Sixty-nine (71.9%) patients had NIH category IV prostatitis, accounting for 83.9% of those with prostatic calcification versus 66.1% of those without (P<0.04). Significant correlations were found between prostatic calcification and the severity of inflammation (P<0.02) as well as the NIH-CPSI subdomain of urinary symptoms (P<0.02). The only predictor for prostatic calcifications were elevated levels of uric acid. Such patients were 1.4times more likely of having calcifications in the prostate gland (OR=1.4, P<0.047). Stone analysis revealed the following: apatite in 41.7%, whewellite in 29.2%, weddellite and brushite in 8.7% each, whitlockite, apatite/whewellite and organic substances in 4.2%.
  
  
  CONCLUSIONS
  On ultrasound examination, one third of patients who were treated with TURP for obstructive BPH had prostatic calcification. These were significantly more common in patients with NIH category IV prostatitis.
authors.affiliation: Department of Urology and Andrology, Lower Austria Regional Hospital of Baden-Mödling, Baden, Austria - paul.engelhardt@baden.lknoe.at.
authors.forename: Paul F
authors.initials: PF
authors.lastname: Engelhardt
authors.forename: Stephan
authors.initials: S
authors.lastname: Seklehner
authors.forename: Herman
authors.initials: H
authors.lastname: Brustmann
authors.forename: Claus R
authors.initials: CR
authors.lastname: Riedl
authors.forename: Lukas
authors.initials: L
authors.lastname: Lusuardi
mesh_terms: D000368:Aged; D015415:Biomarkers / Q000652:urine; D002114:Calcinosis / Q000150:complications / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D011467:Prostate / Q000473:pathology* / Q000601:surgery; D011470:Prostatic Hyperplasia / Q000150:complications / Q000473:pathology* / Q000601:surgery; D011472:Prostatitis / Q000150:complications / Q000473:pathology* / Q000601:surgery; D020728:Transurethral Resection of Prostate; D014545:Urinary Calculi / Q000737:chemistry; D014555:Urination Disorders / Q000209:etiology
chemical_list: D015415:Biomarkers