Phase III Multicentric, Open-label, Randomized Study to Investigate the Efficacy of Chemotherapy in Patients With Positive ctDNA After Surgery and Adjuvant Chemotherapy for a Stage III Colorectal Cancer (PRODIGE 88)
Phase III multicentric, open-label, randomized study The main objective is to assess the efficacy on time to disease recurrence (TTR) of treating minimal residual disease diagnosed by the presence of ctDNA after full treatment (surgery + chemotherapy) in stage III or high-risk stage II colon or upper rectum adenocarcinoma
• Fully resected stage III or high-risk stage II colon or upper rectum adenocarcinoma previously treated by standard adjuvant chemotherapy or peri-operative chemotherapy (FOLFOX or CAPOX) for either 3 or 6 months based on local multidisciplinary meeting, and on TNCD recommendations
• Positive ctDNA screening (methylation) and confirmation (NGS) on samples collected at the 3- or 6 months follow-up visit post-adjuvant chemotherapy
• Patients ≥ 18 years and ≤ 80 years (provided the score of the G8 geriatric questionnaire is \>14 for patients 70 years or older)
• Subjects with WHO performance status \< 2
• No documented disease using TAP CT-scanner and liver MRI in the case of contra-indication to dye contrast (or TEP-scanner may be also used in addition depending on physicians' choice and local availabilities).
• Adequate haematological function: with neutrophils ≥ 1,500 /mm3, platelet count ≥ 100,000/mm3, hemoglobin ≥ 9 g/dL (5,6 mmol/l)
⁃ Total bilirubin ≤ 1.5 x ULN (upper limit of normal) ASAT and ALAT ≤ 2.5 x ULN Alkaline phosphatase ≤ 2.5 x ULN Creatinine clearance ≥50 ml/min according MDRD (Modification of Diet in Renal Disease)
• Available tumor sample for NGS analysis
• Signed written informed consent obtained prior to any study specific procedures
• Patient affiliated to a social security scheme