Prospective, multicentric interventional study to optimize the cutoff value of NPY methylation in liquid biopsies in metastatic colorectal cancer patients treated with first-line FOLFOX/FOLFIRI and panitumumab.~Inclusion is possible after histologically or cytologically proven colorectal adenocarcinoma with metastatic lesions according to RECIST 1.1 at the start of first-line treatment using FOLFOX/FOLFIRI and panitumumab. Patient must have a proven RAS and BRAF wild-type tumor.~Patients will be followed by study protocol up to and including the first CT scan following the last liquid biopsies taken, or when a follow-up period of 11 months is reached, until death, until metastasectomy, until lost to follow-up or until (consent) withdrawal.
Detection of progressive disease by neuropeptide Y (NPY) methylation in liquid biopsies in patients with RAS and BRAF wild-type, unresectable, metastatic colorectal cancer receiving first-line treatment FOLFOX/FOLFIRI and panitumumab.