MP09-04 PROSTATE HEALTH INDEX DENSITY (PHID) IS MORE PREDICTIVE OF DISEASE RE-CATEGORIZATION THAN MULTIPARAMETRIC MRI IN MEN UNDERGOING ACTIVE SURVEILLANCE

INTRODUCTION AND OBJECTIVE: Prostate Health Index (phi) is an FDA-approved serum biomarker that is calculated using total PSA, free PSA, and pro2PSA in an algorithm to estimate the likelihood of having prostate cancer (PCa) and high-grade disease on biopsy. The phi value can be divided by the prostate volume to calculate a phi density (phiD) that may be even more accurate for detecting high grade tumors. Although phiD has been described, its...