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.