PROVENGE is the first product in a new therapeutic class known as autologous cellular immunotherapies to be approved by the U.S. Food and Drug Administration for the treatment of asymptomatic or minimally symptomatic mCRPC.  The 512-patient multi-center, randomized, double-blind, placebo-controlled IMPACT (IMmunotherapy for Prostate AdenoCarcinoma Treatment) study demonstrated that PROVENGE extended median survival by 4.1 months compared to control (25.8 months vs. 21.7 months) and reduced the risk of death by 22.5% compared to control (HR=0.78; P=0.032). Adverse events more commonly reported in the PROVENGE arm in this study included chills, fever, headache, influenza-like illness, muscle aches, hypertension and groin pain. More