title: Racial differences and prognostic significance of tumor location in radical prostatectomy specimens.
abstract: BACKGROUND
  Our objective was to evaluate radical prostatectomy specimens for possible racial differences in tumor location, as well as to correlate tumor location with pathologic stage and disease-free survival.
  
  
  METHODS
  Between January 1991-December 1997, 1,245 patients underwent radical prostatectomy with bilateral pelvic lymphadenectomy for clinically localized prostate cancer. Seven hundred and eighty-five patients who were treated with surgery as monotherapy were evaluated. Tumor location, defined as mainly anterior, mainly posterior, or both (anterior and posterior), was obtained from review of tumor maps prepared from pathological evaluation of completely embedded, resected specimens.
  
  
  RESULTS
  Overall tumor location was anterior in 107 (14%), posterior in 459 (58%), and both in 219 (28%) cases. The incidence of anterior tumors was higher in African American men compared to Caucasians (16% vs. 11%, P = 0.045). The rate of positive surgical margins in anteriorly and posteriorly located tumors was 60% vs. 38% in African American men (P = 0.001) and 48% vs. 27% in Caucasians (P = 0.001), respectively. African American men were found to have a higher incidence of positive surgical margins (50%; 174/348) compared to Caucasian men (34%; 150/437; P = 0.001).
  
  
  CONCLUSIONS
  Anterior tumors were present in 14% of our patients. African American men have a greater percentage of anterior tumors than do Caucasians. In addition, a higher rate of positive surgical margins was encountered in patients with anterior tumors, especially if they were African American men. In patients with an abnormal serum prostate-specific antigen level and negative sextant prostate biopsies, we recommend biopsy of the anterior zone of the prostate.
authors.affiliation: Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, Detroit, Michigan 48201, USA.
authors.forename: R
authors.initials: R
authors.lastname: Tiguert
authors.forename: E L
authors.initials: EL
authors.lastname: Gheiler
authors.forename: M V
authors.initials: MV
authors.lastname: Tefilli
authors.forename: M
authors.initials: M
authors.lastname: Banerjee
authors.forename: D J
authors.initials: DJ
authors.lastname: Grignon
authors.forename: W
authors.initials: W
authors.lastname: Sakr
authors.forename: D P
authors.initials: DP
authors.lastname: Wood
authors.forename: I J
authors.initials: IJ
authors.lastname: Powell
authors.forename: J E
authors.initials: JE
authors.lastname: Pontes
mesh_terms: D000328:Adult; D001741:Black or African American / Q000706:statistics & numerical data; D000368:Aged; D044383:Black People; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D011468:Prostatectomy; D011471:Prostatic Neoplasms / Q000208:ethnology* / Q000473:pathology* / Q000601:surgery; D016019:Survival Analysis; D044465:White People / Q000706:statistics & numerical data