Proximal and large hyperplastic and nondysplastic serrated polyps detected by colonoscopy are associated with neoplasia

Gastroenterology
Mitchal A SchreinerDavid A Lieberman

Abstract

The family of serrated lesions includes hyperplastic polyps and sessile serrated adenomas without dysplasia, as well as traditional serrated adenoma with dysplasia. We investigated whether detection of proximal nondysplastic serrated polyps (ND-SP) at screening and surveillance colonoscopies is associated with advanced neoplasia. The study included 3121 asymptomatic patients (aged 50-75 years) who had screening colonoscopies; 1371 had subsequent surveillance. The proximal colon was defined as segments proximal to the descending colon. Large ND-SP were defined as ≥ 10 mm. We compared rates of detection of any neoplasia and advanced neoplasia at screening and surveillance colonoscopies (within 5.5 years) in patients with and without proximal or large ND-SP. At baseline screening, 248 patients (7.9%) had at least 1 proximal ND-SP. They were more likely than patients with no proximal ND-SP to have advanced neoplasia (17.3% vs 10.0%; odds ratio [OR], 1.90; 95% confidence interval [CI], 1.33-2.70). Patients with large ND-SP (n = 44) were also more likely to have synchronous advanced neoplasia (OR, 3.37; 95% CI, 1.71-6.65). During surveillance, 39 patients with baseline proximal ND-SP and no neoplasia were more likely to have neoplasi...Continue Reading

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