Tumoral Circulating Cells and Colorectal Cancer Progression

Inclusion Criteria: 1. Patient of more than 18 years old 2. Histological diagnosis of colic adenocarcinoma metastatic or not 3. Before any treatment with systemic chemotherapy 4. Patient affiliated to, or beneficiating of the national security 5. Patient having signed informed consent Exclusion Criteria: 1. Patient with previous chemothrapy treatment 2. Patient with more than one evolutive tumoral pathology 3. Patient under long-term immunosuppressor treatment 4. Patient with severe infection 5. Pregnant or breasting woman 6. Person in an emergency situation, adult subject to a legal protection measure (a guardian, guardianship or safeguard of justice), or unable of expressing his / her consent.