At week 13, the PCR results of the pre-immune tumor biopsy must be available. Additional cycles of immunization, ONLY with the peptides expressed by the tumor, mixed with Montanide, will be proposed to patients without tumor progression requiring another treatment. A second cycle of 3 injections at 6-week intervals will be started at week 17, followed by a third cycle of 12 injections at 3-month intervals, starting at month 11. At any time, progression of the disease necessitating any treatment not allowed during the study, will result in withdrawal.