Some Small Prostate Cancers are Nondiploid by Nuclear Image Analysis: Correlation of Deoxyribonucleic Acid Ploidy Status and Pathological Features

Abstract
The biological behavior of a prostate cancer can be predicted to some degree by the volume and extent (stage) of the tumor, and its histological grade. The deoxyribonucleic acid (DNA) ploidy status has been reported by some to be another independent prognostic factor for localized prostate cancer. We determined the DNA ploidy value of each individual focus of cancer in radical prostatectomy specimens using nuclear image analysis (CAS 200 system§). Ploidy results were correlated with the volume, Gleason grade and zone of origin (transition zone or peripheral zone) of each tumor, and with the presence of extracapsular extension or seminal vesicle invasion.