title: Disappearance of the common bile duct signal caused by oral negative contrast agent on MR cholangiopancreatography.
abstract: We report a case in which the signal of the common bile duct disappeared owing to reflux of oral negative contrast agent on MR cholangiopancreatography (MRCP). The patient had previously undergone endoscopic sphincterotomy; after endoscopic sphincterotomy, it is known that patients develop reflux of the duodenal contents into the bile duct. Radiologists should be aware that MRCP of patients who have the possibility of bile counterflow may be hindered by oral negative contrast agents.
authors.affiliation: Department of Radiology, NTT East Tohoku Hospital, Sendai City, Miyagi Prefecture, Japan. reiji.s@thk.mhc.east.ntt.co.jp
authors.forename: Reiji
authors.initials: R
authors.lastname: Sugita
authors.forename: Takuma
authors.initials: T
authors.lastname: Nomiya
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001655:Bile Reflux / Q000175:diagnosis*; D002758:Cholangiography; D003135:Common Bile Duct / Q000473:pathology*; D003287:Contrast Media; D005260:Female; D005290:Ferric Compounds; D005583:Fourier Analysis; D006801:Humans; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging; D011183:Postoperative Complications / Q000175:diagnosis*; D016717:Sphincterotomy, Endoscopic
chemical_list: D003287:Contrast Media; C120852:FerriSeltz; D005290:Ferric Compounds