Comparing the Efficacy of Endoscopic FNA vs FNB in Diagnosing Solid Gastrointestinal Lesions

Endoscopic ultrasound with fine needle aspiration (FNA) allows for the safe and efficacious sampling of solid lesions that are in close proximity to the gastrointestinal tract, including extraintestinal masses, subepithelial tumors, and peri-intestinal lymphadenopathy. Fine needle core biopsy (FNB) has the potential of accruing larger tissue samples during biopsies, which may make the procedure more efficacious. In our study, we are comparing the overall efficacy between these two needles which are currently both used as standard of care.