title: A case of choledochocele mimicking choledocholithiasis on MR cholangiography: A new differential diagnosis of pseudo-filling defect.
abstract: We present the case of a 79-year-old female with acute cholangitis and cholecystitis who presented with right upper quadrant pain. Thin-collimation MR cholangiogram showed a filling defect measuring 1 cm, which was less prominent on single-slab images. Endoscopy showed dynamic ballooning and collapsing of the ampulla of Vater, and a cholangiogram showed characteristic bulging at the distal common bile duct, which led to the diagnosis of choledochocele. It is important to differentiate choledochocele as a cause of filling defect of the lower common bile duct on the MR cholangiogram.
authors: Department of Gastroenterology, Jichi Medical School, Tochigi, Japan. mizum-tky@umin.ac.jp
authors: Masashi
authors: M
authors: Izumiya
authors: Kiichi
authors: K
authors: Tamada
authors: Takeshi
authors: T
authors: Tomiyama
authors: Kazunobu
authors: K
authors: Hanatsuka
authors: Akira
authors: A
authors: Ohashi
authors: Kentaro
authors: K
authors: Sugano
mesh_terms: D000368:Aged; D002758:Cholangiography / Q000379:methods*; D015529:Choledochal Cyst / Q000175:diagnosis* / Q000473:pathology*; D042883:Choledocholithiasis / Q000175:diagnosis* / Q000473:pathology*; D003135:Common Bile Duct / Q000473:pathology; D003137:Common Bile Duct Diseases / Q000175:diagnosis / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D004724:Endoscopy; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D014463:Ultrasonography / Q000379:methods