title: Comparison of power Doppler ultrasound with gray scale transrectal ultrasound in predicting cancer positive prostate biopsy cores.
abstract: OBJECTIVE
  The aim of this study is to compare the effect of transrectal power Doppler ultrasound (PDUS) and gray scale transrectal ultrasound (TRUS) for the diagnosis of prostate cancer.
  
  
  METHODS
  Seventy-six patients evaluated with transrectal PDUS and TRUS underwent eight systematic TRUS guided core-needle biopsies, with additional cores from abnormal areas. Histologic diagnoses were classified as benign prostatic hyperplasia, chronic prostatitis, intraepithelial neoplasia and adenocarcinoma. TRUS and PDUS findings of the cases were recorded.
  
  
  RESULTS
  PDUS sensitivity, specificity, positive predictive value (PPV) and negative predictive values were 81%, 81%, 54% and 94%, respectively. PDUS had a greater sensitivity and specificity than TRUS (43% and 60%, respectively) and identified cancer cases more accurately (Table 2).
  
  
  CONCLUSIONS
  Hypervascular foci in PDUS signify suitable zones for biopsy. When combined with systematic TRUS guided biopsy, PDUS increases the cancer detection rate with additional biopsies from suspicious hypervascular foci. Transrectal PDUS guided biopsy should be combined with gray scale TRUS guided biopsy to increase accuracy in the diagnosis of prostate cancer.
authors.affiliation: Fatih Sultan Mehmet Teaching Hospital, Department of Radiology, Istanbul, Turkey.
authors.forename: Turgay
authors.initials: T
authors.lastname: Kahraman
authors.affiliation: Maltepe University Faculty of Medicine, Department of Radiology, Istanbul, Turkey.
authors.forename: Rahmi
authors.initials: R
authors.lastname: Cubuk
authors.affiliation: Maltepe University Faculty of Medicine, Department of Urology, Istanbul, Turkey.
authors.forename: Orhun
authors.initials: O
authors.lastname: Sinanoglu
authors.affiliation: Fatih Sultan Mehmet Teaching Hospital, Department of Radiology, Istanbul, Turkey.
authors.forename: Nuri
authors.initials: N
authors.lastname: Tasalı
authors.affiliation: Fatih Sultan Mehmet Teaching Hospital, Department of Radiology, Istanbul, Turkey.
authors.forename: Mumtaz
authors.initials: M
authors.lastname: Ozarar
authors.affiliation: Fatih Sultan Mehmet Teaching Hospital, Department of Radiology, Istanbul, Turkey.
authors.forename: Bulent
authors.initials: B
authors.lastname: Saydam
keywords: Biopsy; Cancer; Doppler; Prostate