Measurement system that improves the accuracy of polyp size determined at colonoscopy

World J Gastroenterol. 2015 Feb 21;21(7):2178-82. doi: 10.3748/wjg.v21.i7.2178.


Aim: To assess the accuracy of polyp size using an endoscopic lesion measurement system (ELMS).

Methods: The accuracy of polyp size assessment was compared among measurements acquired by visual estimation, disposable graduated biopsy forceps (DGBF; used as a "scale-plate") and the ELMS.

Results: There were 192 polyps from 166 cases included in this study. The mean diameter of the post polypectomy measurement was 0.85±0.53 cm (range: 0.2-3.0 cm). The mean diameter by visual estimation was 1.10±0.53 cm, which was significantly different compared to the actual size of the polyp (P<0.001). The mean diameters obtained using DGBF (0.87±0.54 cm) and ELMS (0.85±0.53 cm) did not significantly differ from the actual size of the polyp. The difference between the measurements from the ELMS and DGBF was not significant.

Conclusion: Unlike visual estimations at colonoscopy, endoscopic graduated biopsy forceps and the endoscopic lesion measurement system are accurate methods to estimate polyp size.

Keywords: Accuracy; Colonoscopy; Endoscopic lesion measurement system; Polyp size measurement.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenomatous Polyps / pathology*
  • Adenomatous Polyps / surgery
  • Adult
  • Aged
  • Aged, 80 and over
  • Carcinoid Tumor / pathology*
  • Carcinoid Tumor / surgery
  • Colectomy / methods
  • Colonic Neoplasms / pathology*
  • Colonic Neoplasms / surgery
  • Colonic Polyps / pathology*
  • Colonic Polyps / surgery
  • Colonoscopes*
  • Colonoscopy / instrumentation*
  • Colonoscopy / methods
  • Disposable Equipment
  • Equipment Design
  • Female
  • Humans
  • Laparoscopy
  • Male
  • Middle Aged
  • Predictive Value of Tests
  • Prospective Studies
  • Reproducibility of Results
  • Surgical Instruments
  • Tumor Burden
  • Visual Perception