after radical prostatectomy serum prostate specific antigen values decreased to undetectable levels ( less than 0.6 ng . per ml . ) in 89 % of the patients with organ-confined disease , in 87 % of those with microscopically positive margins only but in only 34 % with seminal vesicles or lymph node involvement .
C0194810
radical prostatectomy
C0036628
seminal vesicles