A prospective study of faecal immunochemical testing following polypectomy in a colorectal cancer screening population

Frontline Gastroenterology
David J GibsonGarret Cullen

Abstract

52% of faecal immunohistochemistry test (FIT)-positive clients in the Irish National Colorectal Cancer Screening Programme (BowelScreen) have adenomatous polyps identified at colonoscopy in round 1. Although it is known that advanced adenomas and cancers cause an elevated FIT, it is not known if small (<5 mm) adenomas cause a positive FIT. Determine if removal of small polyps in an FIT-based colorectal cancer (CRC) screening programme is associated with a negative FIT on follow-up. A single-centre prospective observational study of consecutive participants attending for first round screening colonoscopy who had a positive FIT (>45 µg Hb/g) as part of the Irish Colorectal Cancer Screening Programme. Subjects were consented at the time of colonoscopy and were sent a repeat FIT 4-6 weeks later. Precolonoscopy and postcolonoscopy FITs were compared and correlated with clinical findings and endoscopic intervention. 112 consecutive first round participants were recruited. Eight (7%) had cancer, 75 (67%) adenomatous polyps, 17 (15%) a normal colonoscopy and 12 (11%) other pathology. There was a clear difference in median FIT levels between the four groups (P=0.006). Advanced pathology (tumour or adenomatous polyp >1 cm) was associated...Continue Reading

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Citations

Sep 25, 2018·Frontline Gastroenterology·Anton V Emmanuel

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