title: Analysis of suprapubic and transrectal measurements in assessment of prostate dimensions and volume: is transrectal ultrasonography really necessary for prostate measurements?
abstract: BACKGROUND
  The objective of this study was to evaluate the correlation of suprapubic ultrasonography and transrectal ultrasonography in measurements of prostate dimension and volume.
  
  
  METHODS
  One hundred consecutive patients with lower urinary tract symptoms were examined by suprapubic and transrectal ultrasonography modalities in a same session. Measurements of the 3 dimensions of the prostate (anteroposterior, transverse, and craniocaudal) and its volume performed by suprapubic ultrasonography were compared with the corresponding measurements by transrectal ultrasonography in order to determine the correlation of the measurements. Prostate volumes were calculated using the ellipsoid formula. Data were further analyzed in subgroups according to prostate volumes smaller or larger than 50 mL, measured by suprapubic ultrasonography.
  
  
  RESULTS
  The mean prostate volume of the 100 patients, measured by suprapubic and transrectal ultrasonography were 65.9 +/- 35.8 mL and 62.5 +/- 32.0 mL, respectively (r = 0.94; P < .001). The craniocaudal diameters had the strongest correlation among dimension measurements (r = 0.89; P < .001). Suprapubic and transrectal ultrasonography measurements also showed significant correlations for both prostates smaller or larger than 50 mL. Eighty-five percent of the patients had both volume measurements under or above this limit.
  
  
  CONCLUSIONS
  There was strong correlation between suprapubic and transrectal ultrasonography measurements of the prostate sizes, including both for volume or specific dimension measurements.
authors.affiliation: Department of Urology, School of Medicine, Ankara University, Ankara, Turkey.
authors.forename: Eriz
authors.initials: E
authors.lastname: Ozden
authors.forename: Cağatay
authors.initials: C
authors.lastname: Göğüş
authors.forename: Ozcan
authors.initials: O
authors.lastname: Kiliç
authors.forename: Onder
authors.initials: O
authors.lastname: Yaman
authors.forename: Erol
authors.initials: E
authors.lastname: Ozdiler
mesh_terms: D000368:Aged; D003950:Diagnostic Techniques, Urological; D006801:Humans; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D011467:Prostate / Q000000981:diagnostic imaging* / Q000473:pathology*; D011470:Prostatic Hyperplasia / Q000000981:diagnostic imaging* / Q000473:pathology*; D012007:Rectum; D014463:Ultrasonography / Q000379:methods