2.2 Sample collection
Colorectal polyps, colorectal polyp, colorectal polyps
STERILE, COLORECTAL POLYPS, COLORECTAL POLYP, COLORECTAL POLYPS
Faecal samples were self-collected by participants after enrollment and before bowel preparation. Colorectal polyps and normal mucosal biopsies were collected by the sterile biopsy forceps with colonoscopy following a bowel preparation. These tissues together with the mucus were collected, but the mucus was washed away with saline before DNA extraction. All specimens were labeled and immediately archived at -80°C (within 1 hour) until further processing. These specimens were labeled as the normal colorectal mucosal tissues (NC_), colorectal polyp tissues (CP_) and faecal sample (FS_) in the colorectal polyps group (_P) and the healthy control group (_C).