Evaluation of Bile Acid Concentrations and Their Signaling as Markers of Testicular Tumorigenesis and Germ Cell Tumor Chemosensitivity

Inclusion Criteria: * Adult patient, male, with a clinical and biological diagnosis of germ cell tumor of the testis in pre-orchidectomy, at the stage of the disease and any histological subtype of germ cell tumor * Affiliation with a Social Security organization * Able to give informed consent to participate in the research. Exclusion Criteria: * Patient with a hepatobiliary pathology * Patient treated with Colestyramine * Patient who has undergone cholecystectomy or extensive resection of the small intestine * Patient deprived of liberty * Patient under guardianship, curatorship, or legal protection * Patient unable to understand the protocol (language barrier, cognitive difficulties) * Patient with another active cancer * Patient participating in a therapeutic clinical trial * Refusal to participate