A comparison of the antegrade core trap and reverse bevel needles for EUS-guided fine-needle biopsy sampling of liver mass: a prospective randomized cross over study.

Abstract

Data on the use of EUS-guided fine-needle biopsy (EUS-FNB) of solid liver mass (SLM) for pathology is limited. To prove superiority of the diagnostic rate of the newly designed modified Menghini-type needle with a beveled side-slot near the needle tip with slot cutting edge directed 20-gauge antegrade bevel (group A) over the original 22-gauge reverse bevel (group B) for EUS-guided fine-needle biopsy (EUS-FNB) of solid liver mass (SLM) in a prospective crossover randomized controlled trial. The overall diagnostic accuracy rate of the 52 passes was 86.5% (45/52) and of group A versus B were 88.5% (23/26) versus 84.6% (22/26), respectively, p=0.858. Tissue adequacy levels of both groups were not significantly different (grade A: B: C=18:6:2 versus 16:7:3), p=0.839). Grading of blood contamination of both groups was not significantly different. However, it was found that the group-A needles could biopsy tissue of significantly longer length than that of the group B; 1.3cm (SD=0.76) versus 0.8cm (SD=0.54); p=0.007. The use of EUS-FNB of SLM is highly effective with similar levels of efficacy and number of adverse events between both types of needles. Thai Clinical Trial Registration No. TCTR2018081002.