title: Endoscopic Ultrasound-Fine Needle Aspiration versus Core Biopsy for the Diagnosis of Subepithelial Tumors.
abstract: Subepithelial lesions are frequently encountered and remain a diagnostic challenge. Imaging of subepithelial lesions using endoscopic ultrasound (EUS) can be helpful in narrowing the differential diagnosis of the lesion; however, definitive diagnosis typically requires tissue. Many methods for acquiring tissue exist including EUS-guided fine needle aspiration, Trucut biopsy, and fine needle biopsy. Obtaining adequate tissue is important for cytologic and histologic exams including immunohistochemical stains, thus a great deal of effort has been made to increase tissue acquisition in order to improve diagnostic yield in subepithelial lesions.
authors.affiliation: Division of Gastroenterology and Hepatology, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA.
authors.forename: Kevin
authors.initials: K
authors.lastname: Webb
authors.forename: Joo Ha
authors.initials: JH
authors.lastname: Hwang
keywords: Endoscopic ultrasound-guided core needle biopsy; Endoscopic ultrasound-guided fine needle aspiration; Endosonography; Subepithelial masses