Su1402 Initial Experience With the EchoTip Procore Needle for Endoscopic Ultrasound (EUS) Guided-Diagnosis of Mass Lesions

malignancy lesion by cytology was died in one patient due to cancer. The remaining 6 survived without enlargement of IPMN.I-3 Main duct and mixed type of IPMN is studied in our criteria.Max height of Mural nodule over 5 mm has a significant difference (P 0.026). Cross-sectional area of mural nodule over 33 mm2 has not a significant difference (P 0.235).II-1 Among 4 surgical patients with BD-IPMN (average of cyst size21 mm), 3 patients were diagnosed with EUS malignancy before surgery (one is adenocarcinoma-cyst size 38 mm ,two are adenoma). The remaining patient received a cytological diagnosis of class IIIb and was found to have coexisting adenoma upon surgery.II-2 Among 24 patients with BD-IPMN( average of cyst size29 mm), 2 elderly patients follow up diagnosed with EUS malignancy. They have not received surgical operation due to elder age. Among 22 patients who were diagnosed with benign lesions, 2 patients were found to have enlarging IPMN (average of cyst size26 mm). II-3 BD-IPMN were studied in our criteria.Max height over 5 mm of mural nodule has not significant difference (P 0.429). Cross-sectional area of Mural nodule 33 mm2 has significant difference (P 0.429).When the size of cyst is over 30 mm,it has significant difference (P 0.008).We should change the criteria of BD-IPMN: Max height over 9 mm significant difference (P 0.029). Crosssectional area over 50 mm2 has significant difference (P 0.029). Conclusion: EUSand/or IDUS-based preoperative diagnosis, in combination with pathologic diagnosis was effective in accurately identifying all patients with main duct-type or mixed-type IPMN in our criteria.