Colorectal Polyps: when Should We Tattoo?

Current guidelines recommend tattooing of suspicious-looking lesions at colonoscopy without a reference to the size of the polyp. However, the endoscopist has to make a judgement as to which lesion may be malignant and require future localisation based on the appearance and size of the polyp. The aim of this study was to determine the relationship between endoscopic polyp size and invasive colorectal cancer so as to inform tattooing practice for patients taking part in the national bowel cancer screening programme (BCSP).