title: Blood loss during radical retropubic prostatectomy: relationship to morphologic features on preoperative endorectal magnetic resonance imaging.
abstract: OBJECTIVE
  To determine whether morphologic features at preoperative magnetic resonance imaging (MRI) are related to intraoperative blood loss during radical retropubic prostatectomy.
  
  
  METHODS
  Endorectal MRI was performed in 143 patients with newly diagnosed prostate cancer before radical retropubic prostatectomy. Two independent readers rated the prominence of the periprostatic veins (on the basis of number and size) at four anatomic sites on a 3-point scale. Other features analyzed were prostate volume and interspinous diameter.
  
  
  RESULTS
  A prominence of the anterior and posterior apical periprostatic veins was positively associated with blood loss (correlation coefficient = 0.22 and 0.17 and P <0.01 and <0.05, respectively). Blood loss was not related to prostate volume (correlation coefficient = 0.02, P = 0.8) or interspinous diameter (correlation coefficient = 0.01, P = 0.9). The site-specific scores of both readers demonstrated positive agreement, with Pearson's correlation coefficients of 0.51 to 0.65 (P <0.01).
  
  
  CONCLUSIONS
  A marked prominence of the apical periprostatic veins on preoperative MRI is associated with greater intraoperative blood loss during radical retropubic prostatectomy. Other morphologic factors appear unrelated to the amount of intraoperative blood loss.
authors.affiliation: Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, New York, USA.
authors.forename: Fergus V
authors.initials: FV
authors.lastname: Coakley
authors.forename: Steven
authors.initials: S
authors.lastname: Eberhardt
authors.forename: David C
authors.initials: DC
authors.lastname: Wei
authors.forename: Evan S
authors.initials: ES
authors.lastname: Wasserman
authors.forename: Stefan B J
authors.initials: SB
authors.lastname: Heinze
authors.forename: Peter T
authors.initials: PT
authors.lastname: Scardino
authors.forename: Hedvig
authors.initials: H
authors.lastname: Hricak
mesh_terms: D000328:Adult; D000368:Aged; D016063:Blood Loss, Surgical; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011468:Prostatectomy; D011471:Prostatic Neoplasms / Q000098:blood supply* / Q000473:pathology