Accuracy of in vivo optical diagnosis of colon polyp histology by narrow-band imaging in predicting colonoscopy surveillance intervals

• Published in: Gastrointestinal endoscopy Vol. 75; no. 3; pp. 494 - 502
• Main Authors: Gupta, Neil, MD, MPH, Bansal, Ajay, MD, Rao, Deepthi, MD, Early, Dayna S., MD, Jonnalagadda, Sreenivasa, MD, Edmundowicz, Steven A., MD, Sharma, Prateek, MD, Rastogi, Amit, MD
• Format: Journal Article
• Language: English
• Published: Maryland heights, MO Mosby, Inc 01.03.2012; Elsevier
• Subjects: Biological and medical sciences; Clinical Trials as Topic; Colonic Polyps - pathology; Colonoscopy - statistics & numerical data; Digestive system. Abdomen; Endoscopy; Female; Gastroenterology and Hepatology; Gastroenterology. Liver. Pancreas. Abdomen; Humans; Investigative techniques, diagnostic techniques (general aspects); Male; Medical sciences; Middle Aged; Population Surveillance; Predictive Value of Tests; Reproducibility of Results; Retrospective Studies; Stomach. Duodenum. Small intestine. Colon. Rectum. Anus; Tumors; NBI; NPV; narrow-band imaging; American Society for Gastrointestinal Endoscopy; PIVI; Preservation and Incorporation of Valuable Endoscopic innovations; ASGE; negative predictive value; Narrow band imaging; Histology; Colonic disease; In vivo; Accuracy; Surveillance; Narrow band signal; Colonoscopy; Gastroenterology; Colon polyp; Digestive diseases; Diagnosis; Endoscopy
• ISSN: 0016-5107; 1097-6779
• DOI: 10.1016/j.gie.2011.08.002

Background The American Society for Gastrointestinal Endoscopy (ASGE) recently developed thresholds for the performance characteristics of technologies for real-time assessment of histology of diminutive (≤5 mm) colon polyps. Narrow-band imaging (NBI) has been shown to predict polyp histology with moderate to high accuracy in several studies. Objective To determine whether in vivo optical diagnosis of polyp histology by using NBI can reach the 2 benchmarks set forth by the ASGE. Design Retrospective analysis of data from 3 prospective clinical trials. Setting Two tertiary referral centers. Patients Subjects undergoing screening or surveillance colonoscopy. Interventions In vivo optical diagnosis of polyp histology by using NBI. Main Outcome Measurement Accuracy in predicting colonoscopy surveillance intervals, negative predictive value (NPV) for diagnosing adenomatous histology in the rectosigmoid. Results A total of 410 patients met the inclusion/exclusion criteria and had at least 1 polyp seen and resected during colonoscopy. Using in vivo optical diagnosis instead of histopathology for all diminutive polyps predicted the correct colonoscopy surveillance interval in 86% to 94% patients. When optical diagnosis was limited to diminutive polyps in the rectosigmoid only, the NPV for diagnosing adenomatous histology with NBI was 95%. Limitations Retrospective analysis from tertiary referral centers. Conclusions The threshold NPV for diagnosing adenomatous histology in diminutive rectosigmoid polyps recently set forth by the ASGE can be achieved by using NBI. The threshold accuracy rate for predicting surveillance interval recommendations can be reached by using NBI, but only if patients with 1 to 2 small adenomas without advanced features have a repeat colonoscopy in 10 years.