Active Control of Prostatic Cancer With Criteria of Latence

Inclusion Criteria: * patient with a latent prostatic cancer * aged less 75 years old, * life expectation higher than 10 years * Clinic statue T1c or T2a * with a seric PSA (prostatic specific antigen)smaller than 10ng/ml * more than 10 biopsy cores samples * patient with less than 3 cores samples with tumor and none care sample with more than 3mm of tumor * Gleason score inferior at 7 * patient's agreement about project and a second biopsy which will include definitive patient: realized 3 months after the first and having: 14 biopsy cores samples (10 like previously and 4 more specific: taking around the positives initials biopsies), less than 3 cores samples with tumor, ,any cores samples with more than 3mm of tumor, a Gleason score superior at 7. Exclusion Criteria: * patient aged 75 years old and more * no patient's agreement * lack of understanding of plan * patient with guardianship * life expectation smaller than 10 years * patient with an other cancer less than 5 years * Local clinical statue greater than T2a * seric PSA higher than 10ng/ml * less than 10 biopsies * more than 2 positives biopsies during the first intervention * 3 cores samples with more than 3mm of tumor * 4th grade on the biopsies * patient's refuse to realize the second biopsies * patient who ask a treatment after the first medical examination * patient with less 4 special biopsies around the previously initial cores samples or more than 2 positives biopsies or biopsies with more than 3mm of tumor or patient having a 4 grade on biopsies, during the second medical examination.