A Clinico-biological Database in Cachexia in Patients With Colon Cancer

Inclusion Criteria: 1. Age ≥ 18 years old, 2. Patient treated at the Montpellier Regional Cancer Institute for colon cancer not eligible for surgery (of the primary tumor or associated metastases), whether undergoing treatment or not, 3. Patient requiring treatment for colon cancer (chemotherapy, targeted therapy, etc.), 4. Patient having accepted the constraints of the research and the blood samples planned for the research 5. Patient affiliated to Social Protection system 6. Informed consent form signed Exclusion Criteria: 1. Patient requiring surgery (for treatment of colon cancer or metastasis) 2. Patient with exclusive peritoneal carcinomatosis 3. Patient requiring radiotherapy 4. Patient unable to understand or comply with study instructions or requirements for psychological, family, social or geographical reasons 5. Pregnant and/ or breastfeeding women 6. Patient cared for an emergency context