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Surgical Endoscopy

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Open Access 01-01-2016

Two-stage optical system for colorectal polyp assessments

Authors: Mirosław Szura, Artur Pasternak, Krzysztof Bucki, Katarzyna Urbańczyk, Andrzej Matyja

Published in: Surgical Endoscopy | Issue 1/2016

Abstract

Background and aims

Macroscopic real-time evaluations of the histopathology and degree of invasion of colorectal polyps help to select the most suitable endoscopic treatment method. Dual-focus (DF) narrow-band imaging (NBI) is a new imaging enhancement system that uses digital and optical methods to enhance the view of blood vessels on mucosal surfaces. However, the superiority of this technique over standard imaging techniques has not been previously reported. The aim of this study was to determine whether the two-stage optical systems in a new generation of endoscopes will increase the diagnostic accuracy of colorectal polyp recognition.

Methods

The study included 270 patients, and 386 colorectal polyps were diagnosed and removed. The polyps were assessed with white light and NBI using one- and two-stage optical systems, respectively. After being classified according to the Kudo pit pattern schemes, the polyps were removed and histopathologically verified.

Results

Regarding non-neoplastic lesions (Kudo I and II), no difference was observed in the recognition of polyps when using the NBI-DF function. We observed improved accuracy in the preliminary diagnoses of Kudo III_L lesions (from 87.16 to 90.09 %, p < 0.05) and Kudo III_S lesions (from 87.29 to 92.79 %, p < 0.01). NBI-DF also increased the accuracy of preliminary diagnoses of Kudo IV lesions (from 88.24 to 94.12 %, p < 0.01). The Kudo V pit patterns were also more distinct with NBI-DF imaging, increasing the diagnostic accuracy from 91.67 to 100 %.

Conclusions

Using a two-stage optical system with electronic colorization of the mucosa increased diagnostic accuracy for differentiating colorectal polyps with neoplastic potential.

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Title: Two-stage optical system for colorectal polyp assessments
Authors: Mirosław Szura
Artur Pasternak
Krzysztof Bucki
Katarzyna Urbańczyk
Andrzej Matyja
Publication date: 01-01-2016
Publisher: Springer US
Published in: Surgical Endoscopy / Issue 1/2016
Print ISSN: 0930-2794
Electronic ISSN: 1432-2218
DOI: https://doi.org/10.1007/s00464-015-4186-x

At a glance: The STEP trials

Springer Medicine

Two-stage optical system for colorectal polyp assessments

Abstract

Background and aims

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Background and aims

Methods

Results

Conclusions

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