Validation of a microRNA-based Fecal (miRFec) Test for Colorectal Cancer Screening, Surveillance and Diagnosis

Inclusion Criteria: * Male or female aged 50 to 75 (average-risk) referred to colonoscopy-based CRC screening. * Male or female aged 30 to 80 with family history of CRC (moderate-risk) referred to colonoscopy-based CRC screening. * Male and female aged 18 or older with personal history of colorectal polyps referred to colonoscopy surveillance. * Male and female aged 18 or older with personal history of CRC referred to colonoscopy surveillance. * Male and female aged 18 or older with colorectal symptoms referred to diagnostic colonoscopy. Exclusion Criteria: * Lack of informed consent to participate * Personal history of Lynch syndrome * Personal history of adenomatous or hamartomatous polyposis * Personal history of serrated polyposis syndrome * Personal history of inflammatory bowel disease * Personal history of total colectomy for any reason * Family history of Lynch syndrome * Family history of adenomatous or hamartomatous polyposis * Family history of serrated polyposis syndrome