A prospective multicenter evaluation of a new side-port endoscopic ultrasound-fine-needle aspiration in solid upper gastrointestinal lesions.

Background And Study Aims: Diagnostic yield of endoscopic ultrasound (EUS)-fine-needle aspiration (FNA) varies depending on the equipment used and the site targeted. Multiple needle passes are usually required to obtain a diagnosis. A new needle incorporating a side-port carries a theoretical advantage regarding acquisition of cytological material.