Abstract

Advances in endoscopic technology, such as narrow band imaging and high definition colonoscopes, offer the potential for optical diagnosis (OD) with a "resect and discard" (RD) strategy for diminutive (≤5mm) and small (6-9mm) colorectal polyps. This could help alleviate the huge cost and time burden required for histopathology. The aim of this study is to conduct an economic analysis of a RD strategy within the English Bowel Cancer Screening Programme (BCSP). A decision tree was designed to compare a RD strategy with standard histopathology for patients included in the DISCARD3 study and was extrapolated to a national BCSP patient cohort. Of the 525 patients in the DISCARD3 study, 354 were assessed for surveillance intervals (after excluding cases with colorectal cancer and at least one polyp >10 mm). 269/354 cases had polyps of which, 182 had only diminutive polyps, 77 had both small and diminutive polyps, and 10 had only small polyps. Surveillance interval concordance was 97.9% in patients with at least 1 diminutive polyp and 98.7% in patients with at least 1 diminutive or small polyp. In DISCARD3, a RD approach would reduce overall direct healthcare costs by £35,468.8 (-72.3%) for patients with diminutive polyps or by £42,666.2 (-75.0%) for patients with diminutive or small polyps. When extrapolated to the entire English BCSP, the annual savings are almost £2.4m for patients with diminutive polyps or £3.4m for patients with diminutive or small polyps, after adjusting for the costs of an OD quality assurance process (QAP). OD with a RD strategy for diminutive and small polyps during BCSP colonoscopy would offer substantial cost savings without adversly affecting surveillance interval concordance.

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