Evaluation of Sodium Fluoride PET in the Identification of Bone Metastases in Patients Having Undergone a Choline PET for Occult Recurrence of Prostatic Adenocarcinoma

Inclusion Criteria: * Prostate adenocarcinoma regardless of Gleason score * Patients having undergone radical treatment (prostatectomy or radiotherapy (external or brachytherapy) +/- conco-adjuvant hormonal therapy) * Level of Prostate Specific Antigen (PSA) indicating recurrence: PSA \> 0.2 ng/ml in case of prostatectomy (in 2 consecutive tests in less than 1 month) or elevation of PSA of at least 2 ng/ml above nadir in case of radiotherapy or brachytherapy (in 2 consecutive tests in less than 1 month) * Negative conventional assessment (thoracic-abdominal-pelvic scanner and bone scintigraphy) during 6 weeks before inclusion * Patient having undergone a choline PET at CHRU Nancy * Signed informed consent * Affiliation to French social security * Absence of contraindications to sodium fluoride PET Exclusion Criteria: * Refusal or impossibility of informed consent * Patient incapable to consent * Patient deprived of liberty * Person under legal protection * Person in life-and-death emergency * Drug addiction, alcoholism, psychological problems affecting patient compliance * Severe co-morbidities * Modification of hormonal therapy (if applicable) during 3 months before inclusion * Renal insufficiency (creatinine clearance \< 60 ml/min) detected during last assessment before inclusion * Other progressive tumors (recovered cancers are not a non-inclusion criteria)