Salvage Radiotherapy Combined With Hormonotherapy in Oligometastatic Pelvic Node Relapses of Prostate Cancer

1. Hormonotherapy Hormone therapy is recommended Eligard 45 mg acting for 6 months. It will be ideally administered the day of start of radiation therapy or within 3 months before the first day of radiotherapy. Nevertheless, free prescription is left to investigators. When using other hormonal strategies (anti-androgen agonists, LHRH antagonists or LHRH), an administration for six months will be critical. 2. Radiotherapy Conformational Radiotherapy techniques in Intensity-Modulated (IMRT) 2.1) Doses prescribed * PTV1 PTV5 to 66 Gy in 30 fractions of 2.2 Gy * PTV Pelvis: 54 Gy in 30 fractions of 1.8 Gy * PTV Loge 60 Gy in 30 fractions of 2 Gy 6 Gy A complement of 3 in two additional fractions Gy may be delivered across the lodge PTV. * PTV Relapse Lodge: In addition to treating the PTV Lodge, additional radiation of 6 Gy in 3 fractions of 2 Gy may be made to bring the total dose of 72 Gy in 36 fractions of 2 Gy. 2.2) Treatment Radiation Guided by a picture (IGRT) will be performed daily. This daily recalibration will be based at least on bone structures. It will be possible to readjust the nodal structures.