In the investigators's previous work, measurements of intra-prostatic concentrations of sex steroids were determined on samples taken from the operating room using a punch.

In order to study the in-vivo intra-prostatic concentrations of sex steroid, it is necessary to validate a measurement technique performed on samples obtained by a biopsy needle used in standard care for prostate biopsy punctures allowing the diagnosis and follow-up of prostate cancer.

The aim of this project is to validate this measurement technique carried out on samples obtained by the biopsy needle and to define the optimal number of carrots obtained by biopsy offering dosage results comparable to the punch.

Inclusion Criteria:

• Patient aged ≥ 18 years
• With a bladder cancer
• Should be operated by total cystoprostatectomy at Foch Hospital
• Affiliated to a health insurance scheme
• Having expressed the non-opposition for the participation to the study

Exclusion Criteria:

• Patient receiving or has received a treatment by analog or antagonist of Luteinizing Hormone Releasing Hormone (LHRH), antiandrogens (steroidal or non-steroidal), 5 alpha-reductase inhibitor, docetaxel or cabazitaxel chemotherapy, abiraterone acetate, enzalutamide or corticosteroids
• Patient who does not understand French
• Patient deprived of liberty or under guardianship

Adult male with a bladder cancer and expected to benefit from a total cystoctoectomy in the Urology Department of Foch Hospital.