Prostate Cancer Ki-67 (MIB-1) Expression, Perineural Invasion, and Gleason Score as Biopsy-Based Predictors of Prostate Cancer Mortality: The Mayo Model

This study documents that long-term prostate cancer outcomes are best estimated with a combination of Gleason score, perineural invasion, and Ki-67 expression. Given its low cost, rapid assessment, and strong predictive power, we believe that adding Ki-67 expression to perineural invasion and Gleason score at biopsy should be considered a standard by which all new biomarkers are compared before introducing them into clinical practice.