TISSUE SAMPLING METHODS FOR GASTRIC SUBEPITHELIAL TUMORS

Abstract

Gastric subepithelial tumors (SET) represent one of the most frequently encountered lesions during routine endoscopy. Although EUS is essential for diagnosis of SET, EUS alone cannot accurately diagnose mesenchymal tumors. Histopathological evaluation and immunohistochemical analysis are essential to conclusively diagnose SET; therefore, various tissue collection techniques such as a boring biopsy, endoscopic ultrasound-guided fine needle aspiration/biopsy (EUS-FNA/B), and mucosal incision-assisted biopsy (MIAB) are used in clinical practice. In this article, we present an overview of EUS-FNA/B and MIAB for gastric SET, focused on the findings of current clinical research in this field.