Perception of Cohesion Within a Relationship (Dyadic Adjustment) on the Quality of Life of Patients With Prostate Cancer With Gonadotropin-releasing Hormone.

Inclusion Criteria: * Patient presenting with histologically confirmed prostate cancer. * Patient eligible to start GnRH agonist therapy, either as monotherapy or adjuvant therapy, and for whom one of these treatments was selected voluntarily by the urologist, prior to the start of the study. * Patient currently living with the same partner for at least 6 months. * Patient and partner capable of reading, understanding and returning an evaluation self-questionnaire 6 months after the initial consultation. * Patient giving its written consent to participate to the study. Exclusion Criteria: * The subject is participating in another clinical trial. * Patient who has received a GnRH agonist therapy during the last 2 years.