Colonoscopic Ultrasound-Guided Fine-Needle Aspiration Using a Curvilinear Array Transducer: A Single-Center Retrospective Cohort Study

Abstract

See YouTube Video on our YouTube Channel: https:// youtu.be/L8VDbHrmHWk PRELIMINARY RESULTS: A total of 13 female patients underwent colonoscopic ultrasound. All patients (100%, 13/13) were successfully scanned. Fine-needle aspiration was deemed necessary and successfully performed in 100% (5/5) of the patients. Tissue samples collected by fine-needle aspiration resulted in a diagnostic yield of 60%, and no adverse events resulted from this intervention.CONCLUSIONS: This study demonstrates the feasibility of performing colonoscopic ultrasound with a curvilinear array transducer. Fine-needle aspiration for subepithelial, colonic, and extracolonic lesions is feasible and safe in this setting with no adverse events reported in our study. FUTURE DIRECTIONS: Future research should be directed toward validating colonoscopic ultrasound with a curvilinear array transducer technique in prospective randomized trials. Studies evaluating the feasibility and safety of endoscopic ultrasound-guided interventions in the colon, such as abscess drainage and enteral anastomosis, should be considered.

AGA Clinical Practice Update on Management of Subepithelial Lesions Encountered During Routine Endoscopy: Expert Review

“…Assessment of SEL of the right colon could be challenging but has been performed using curvilinear echoendoscopes or high-frequency catheter probes. 14,15 EUS is superior to cross-sectional imaging in delineating the layer of origin of a SEL and narrowing down the differential diagnosis. 12,16 For example, lesions arising from the second layer are often lipomas, carcinoids, or pancreatic rests, whereas lesions originating from the fourth layer are often GISTS or leiomyomas.…”

Diagnosis by Endoscopic Ultrasonography-Guided Sampling through the Lower Gastrointestinal Tract

“…Then, an overtube is inserted across the sigmoid colon and carefully exits the colonoscope. Finally, the EUS equipment is inserted via the overtube and the guidewire [ 47 ]. The operation flow of this technology is shown in Figure 1 .…”

The use of ultrasound in colonic and perianal diseases

“…These capabilities had long been limited to the rectum as colonic intubation and maneuvering with these transducers is technically challenging. Recently, a standardized over-the-wire technique for colonic US using a flexible overtube has been reported with promising results: EUS-guided fine-needle aspiration (EUS-FNA) of lesions located proximal to the rectum was performed successfully in 13 patients with a diagnostic yield of 60% [ 23 ▪▪ ]. Another successful EUS-FNA sampling of a descending colon schwannoma was reported with a similar colonic intubation method [ 24 ].…”