Usefulness of endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) for undiagnosed intra-abdominal lymphadenopathy

Background The differentiation between benign and malignant abdominal lymph nodes is difficult, especially if no primary site is evident or if cancer resection was remote in time. The aim of this study was to evaluate the yield of endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) in patients with undiagnosed intra-abdominal lymphadenopathy.