Prognostic factors for newly diagnosed prostate cancer and their role in treatment selection.

Adenocarcinoma of the prostate is extremely heterogeneous, ranging from an indolent chronic illness to an aggressive rapidly fatal systemic malignancy. The classic prognostic factors of tumor stage, prostate specific antigen level, and Gleason score have been used for over a decade to categorize patients at the time of diagnosis into broad risk groups that help to determine appropriate management. Although the grouping of patients into favorable, intermediate, and high-risk categories has become standard, and the categories continue to define distinct prognostic subgroups, considerable heterogeneity exists within each risk group. As a range of management options are available, additional prognostic factors can be considered when determining the treatment approach for an individual patient. We review these additional prognostic variables under the headings of patient-related, tumor-related, and treatment-related. The influence of each of these factors may vary depending on treatment factors such as dose, the radiation modality, or the use of concomitant androgen ablation.