African-American men with nonpalpable prostate cancer exhibit greater tumor volume than
matched white men
Ricardo F. Sanchez-Ortiz, MD Department of Urology, The
University of Texas M. D. Anderson Cancer Center, Houston, Texas
Cancer 2006;107:75
Although prostate cancer (PC) mortality
disproportionately affects African-American (AA) men, limited data exist comparing the
pathologic characteristics of white and AA patients with nonpalpable PC (clinical stage
T1c). |
|
The authors reviewed the radical prostatectomy
(RP) specimens from 37 consecutive AA men with clinical stage T1c PC and 35 white men who
were matched for age, clinical stage, serum prostate-specific antigen (PSA) level, year of
surgery, prostate weight, and prostate biopsy strategy. Pathologic characteristics were
compared after mapping tumor foci and calculating tumor volumes by using computer
software. |
|
For AA men, the median age (57.7 years), mean
serum PSA level (9.3 ng/mL), mean prostate weight (43 g), and biopsy strategy (73%
sextant) were matched with the cohort of 35 white men (median age, 57.1 years; mean PSA,
9.3 ng/mL;, mean prostate weight, 43 g; biopsy strategy, 66% sextant). Despite similar
biopsy characteristics between the 2 groups (Gleason score 7 in 43% of AA men vs.
37% of white men), AA men exhibited significantly higher
prostatectomy Gleason scores ( 7 in 76% of AA men vs. 34% of white men; P = .01).
AA men also had a higher mean tumor volume (1.82 cm3 vs. 0.72 cm3; P
= .001) and had 2.8 times more tumor per ng/mL of serum PSA (0.22 cm3 per ng/mL
vs. 0.079 cm3 per ng/mL; P = .001). |
CONCLUSIONS |
Compared with a cohort of white men with similar
clinical features at the time of biopsy, AA men with nonpalpable PC had
higher prostatectomy Gleason scores, greater cancer volume, and greater
tumor volume per ng/mL of serum PSA. These data provide additional support for the concept
of early PC detection using a serum PSA threshold of 2.5 ng/mL for biopsy among AA men. Cancer
2006. |
|