Prostate cancer is the fisrt one in male with 80.000 new cases each year in France. Forty thousand curative treatments are performed each year, but 25 to 30% of these patients will present a cancer reccurence after radical surgery or conformationnal radiotherapy, Tissu hypoxia seems to be mainly responsible of the local reccurence and conduct to molecular damages that creates carcinogenesis and tumor agressitivity. This hypoxia inhibits the DNA healing and the apoptosis but increases the angiogenesis, that leads to treatment resistance. L. Marignol \&al clearly showed that hypoxia may have a main role in hormonal resistance. Furthermore, M. Milosevic \& al showed that hypoxia is an independent factor of local reccurence after radiotherapy. Nowadays, new technics of IMRT in radiotherapy planning could be able to target an hypoxic prostate region to prevent reccurence. Patients who are eligible to radical prostatectomy will benefit of a prostate MRI with BOLD sequences and a 18F-misonidazole PET before surgery. The results of these two technics will be compared to the histological results using CAIX and HIF immunohistochemistery markers
