Gf uct240

All procedures were performed between December 2010 and December 2020 at the endoscopic center of Inha University Hospital and Asan Medical Center. An ultrasound scanning system (SSD 5500, 5 and 10; Aloka, Tokyo, Japan) with linear (GF-UCT 240; Olympus Optical corp. Ltd., Tokyo, Japan) and radial (GF-UE 260; Olympus Optical corp. Ltd., Tokyo, Japan) echoendoscopes was used. The examination was conducted by endosonographers with at least five years of experience. Endosonographers at two separate sites independently acquired and completed the analysis of the EUS images. The clinical data were analyzed for image findings and pathological diagnosis of the patients. To validate the diagnosis of unclear cases, FNA or histology analysis through surgery was performed and 44% of the patients experienced this additional level of diagnosis. This study was reviewed and approved by the Institutional Review Boards of Inha University Hospital (2020-05-002) and of Asan Medical Center (2020-1290-0001).
The EUS data were acquired from 47 MCN and 31 SCN patients at the 1st hospital and 13 MCN and 18 SCN patients at the 2nd hospital. The characteristics of the patients and lesions for this study are summarized in Table 1. Figure 1 shows a sample of histology images for MCN (Figure 1A) and SCN (Figure 1B) cases.

All EUS procedures were performed with a curved linear-array echoendoscope (Olympus GF-UE260, GF-UCT240; Olympus Optical Co., Tokyo, Japan) with a universal ultrasound processor (EU-ME2; Olympus Optical Co., Tokyo, Japan). All ERCP procedures were performed with a therapeutic duodenoscope (JF240, JF260V, TJF 260V; Olympus Optical Co., Tokyo, Japan). A single-lumen cannula (ERCP catheter; MTW Endoskopie, Wesel, Germany) and a guidewire (length, 450 cm; diameter, 0.06 cm; VisiGlide2; Olympus Medical Systems, Tokyo, Japan) were used for cannulation during ERCP. Three endoscopists, all of whom had experience of performing more than 300 CLAEUS procedures and more than 700 ERCP procedures, performed or supervised the CLAEUS and ERCP.