FOLICOLOR TRIAL: Following Therapy Response Through Liquid Biopsy in Metatstatic Colorectal Cancer Patients

Inclusion Criteria:

* Man or woman ≥ 18 years of age at the time the informed consent is obtained
* ECOG performance status of 0-2
* Histologically or cytologically confirmed adenocarcinoma of the colon or rectum in subjects with unresectable metastatic (M1) disease
* There should be at least 1 uni-dimensionally measurable (min. 10mm) using conventional crosssectional imaging techniques (CT or MRI scan). Lesion must not be chosen from a previously irradiated field, unlessnthere has been documented disease progression in that field after irradiation and prior to randomization. All sites of disease must be evaluated ≤ 28 days prior to randomization
* Adequate hematology, renal, hepatic and coagulation function (at treating physician's discretion)
* Adequate blood results for treatment (at treating physician's discretion)
* Starting a first line treatment

Exclusion Criteria:

* History of prior or concurrent central nervous system metastases
* History of other malignancy, except:

Malignancy treated with curative intent and with no known active disease present for ≥ 3 years prior to randomization and felt to be at low risk for recurrence by the treating physician.

Adequately treated non-melanomatous skin cancer or lentigo maligna without evidence of disease.

Adequately treated cervical carcinoma in situ without evidence of disease. Prostatic intraepithelial neoplasia without evidence of prostate cancer

* Prior chemotherapy or other systemic anticancer therapy for the treatment of metastatic colorectal carcinoma including but not limited to bevacizumab and anti-EGFR therapy (e.g. cetuximab, panitumumab, erlotinib, gefitinib, lapatinib)
* Prior adjuvant chemotherapy (including oxaliplatin therapy) or other adjuvant systemic anticancer therapy including but not limited to bevacizumab and anti-EGFR therapy (e.g. cetuximab, panitumumab, erlotinib, gefitinib, lapatinib) for the treatment of colorectal cancer ≤ 6 months prior to randomization with the following exceptions: Subjects may have received prior fluoropyrimidine therapy if administered solely for the purpose of radiosensitization for the adjuvant or neoadjuvant treatment of rectal cancer.
* Radiotherapy ≤ 14 days prior to randomization. Subjects must have recovered from all radiotherapy-related toxicities.