Estimation for adequacy of histopathologic specimen based on macroscopic findings of specimen obtained by EUS-FNA using 19-gauge needle

Primary outcome(s): To evaluate correlation between macroscopic findings of EUS-FNA specimen obtained a 19-gauge needle and adequacy of specimen for histopathological analysis

主要研究结局：评估使用19号针头获取的内镜超声引导下细针抽吸术（Endoscopic Ultrasound-guided Fine Needle Aspiration, EUS-FNA）标本的肉眼宏观表现，与该标本用于组织病理学分析的合格性之间的相关性。