Possibility on detection of cystic duct lesions by curvilinear-array endoscopic ultrasonography

Abstract

The aim of this study was to evaluate the possibility on detection of cystic duct lesions by endoscopic ultrasonography (EUS). Consecutive 711 patients were attempted to demonstrate systematically biliary tract using curvilinear-array EUS. In these patients, the detected cystic duct lesions and the delineation capability of cystic duct were investigated. Thirty cystic duct lesions were found, of which 22 lesions were stones, 4 were carcinomas, 3 were adenomyomatosis, and 1 was a hyperplastic polyp. EUS demonstrated all lesions; however, the calculous/acalculous lesions in transabdominal US, computed tomography, magnetic resonance imaging were demonstrated in 0%/12.5%, 42.1%/85.7%, and 41.2%/75.0%, respectively. The frequent reason of performing EUS was the search of causes of cholecystitis/cholangitis/pancreatitis in calculous lesions, and the increase/appearance of stones/debris in gallbladder in acalculous lesions. Continuous observation of the cystic duct was achieved in 82.3% (585/711). The achievement rate rose to 93.6% (336/359) in the later study period from 70.7% (249/352) in the early study period. Curvilinear-array EUS has high delineation capability of cystic duct and the possibility of the detection of cystic duct lesions.