Comparison of Tube-assisted Mapping Biopsy with Digital Single-operator Peroral Cholangioscopy for Preoperative Evaluation of Biliary Tract Cancer

Overview

Journal Clin Endosc

Date 2022 Jul 19

PMID 35853618

Authors

Tsuyoshi Takeda

Takashi Sasaki

Takafumi Mie

Takeshi Okamoto

Chinatsu Mori

Takaaki Furukawa

Yuto Yamada

Akiyoshi Kasuga

Masato Matsuyama

Masato Ozaka

Naoki Sasahira

Affiliations

Soon will be listed here.

Abstract

Background/aims: Digital single-operator cholangioscopy (DSOC)-guided mapping biopsy (DMB) and tube-assisted mapping biopsy (TMB) are two techniques used for preoperative evaluation of biliary tract cancer (BTC). However, data regarding the diagnostic performance of these techniques are limited.

Methods: We retrospectively examined consecutive patients with BTC who underwent either technique at our institution between 2018 and 2020. We evaluated the technical success rate, adequate tissue acquisition rate, and diagnostic performance of these techniques for the evaluation of lateral spread of BTC.

Results: A total of 54 patients were included in the study. The technical success rate of reaching the target sites was 95% for DMB and 100% for TMB. The adequate tissue acquisition rate was 61% for DMB and 69% for TMB. The adequate tissue acquisition rate was low, especially for target sites beyond the secondary biliary radicles. The sensitivity of DMB alone was 39%, which improved to 65% when combined with visual impression. Experts demonstrated a higher negative predictive value and diagnostic accuracy with respect to both DSOC visual impression and DMB for the evaluation of lateral spread of BTC compared to trainees.

Conclusion: Adequate tissue acquisition rates were similar between the two techniques. Since DMB requires expertise, TMB may be an acceptable option when DSOC is unavailable or when DSOC expertise is limited.

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