High Yield of Colorectal Neoplasia Detected by Colonoscopy following a Positive Faecal Occult Blood Test in the Nhs Bowel Cancer Screening Programme

Abstract

The majority of colonoscopies were performed following 'weak positive' FOB results. Those with an 'abnormal' result were more likely to be diagnosed with cancer. The high yield of pathology in both the 'abnormal' and 'weak positive' groups justifies the need for colonoscopy in both.