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Author Spotlight: Advancing Biopsy Techniques with Transesophageal Ultrasound

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Fine-needle tissue acquisition from subepithelial lesions using a forward-viewing linear echoendoscope.

Alberto Larghi¹, Lorenzo Fuccio², Gaia Chiarello³

¹Digestive Endoscopy Unit, Catholic University, Rome, Italy.

|November 13, 2013

Summary

Endoscopic ultrasound-guided fine-needle tissue acquisition (EUS-FNTA) using a new forward-viewing scope significantly improved diagnostic accuracy for gastrointestinal subepithelial lesions. This safe technique achieved high sensitivity and specificity, offering a reliable method for lesion characterization.

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Area of Science:

Gastroenterology
Endoscopic Imaging
Diagnostic Accuracy

Background:

Endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) for subepithelial lesions (SELs) has suboptimal diagnostic accuracy.
A novel forward-viewing EUS scope (FV-EUS) was developed to potentially improve tissue acquisition.

Purpose of the Study:

To evaluate the diagnostic accuracy of the EUS-guided fine-needle tissue acquisition (FNTA) technique using the FV-EUS scope for SELs.
To assess the safety and feasibility of this new sampling method.

Main Methods:

Retrospective analysis of prospectively collected data from 121 patients with SELs undergoing EUS-FNTA with FV-EUS.
Procedures performed by a single expert endoscopist between 2007 and 2011.
Histological assessment including immunostaining was completed for 93.4% of patients.

Main Results:

The FV-EUS scope facilitated technically feasible EUS-FNTA in 120 out of 121 patients, with no complications.
Diagnostic accuracy for neoplastic vs. non-neoplastic diseases showed 92.8% sensitivity and 100% specificity.
High diagnostic performance metrics including positive and negative likelihood ratios were observed.

Conclusions:

EUS-FNTA with the FV-EUS scope is a safe and highly accurate method for sampling gastrointestinal SELs.
Further comparative studies are needed to distinguish the impact of the sampling technique versus the scope type on diagnostic yield.