For Screening group (normal colonoscopy \& colonic polyps):

asymptomatic, 50-75 year old, without personal or family history of CRC/polyps

asymptomatic, 40-75 year old, known personal or first-degree family history of either CRC or polyps

For Cancer group:

any patient with diagnosis of colorectal cancer

any patient with diagnosis of prostate cancer

any patient with diagnosis of breast cancer

Urine Metabolomics and Colorectal Cancer Screening