Dynamic Intraductal Endoscopic Visualization of Right Hepatic Artery Pulsation Underlying Minor Vascular Impression of the Proximal Bile Duct
Department of Medicine II, Saarland University Medical Center, Homburg, Germany; Department of Medicine, Marienhausklinik St. Josef Kohlhof, Neunkirchen, Germany
Address reprint requests to: Vincent Zimmer, Department of Medicine II, Saarland University Medical Center, Homburg, Germany, Phone: +496841173755, e-mail: firstname.lastname@example.org
How to cite this article: Zimmer V. Dynamic Intraductal Endoscopic Visualization of Right Hepatic Artery Pulsation Underlying Minor Vascular Impression of the Proximal Bile Duct. Euroasian J Hepato-Gastroenterol 2021;11(1):41-42.
Source of support: Nil
Conflict of interest: None
Right hepatic artery (RHA) syndrome is a well-recognized, though an uncommon cause of benign bile duct stricture, potentially simulating malignancy. Albeit the latter was not the case in this unique clinical report after cholangitis resolution and clearance of biliary sludge and debris, high-quality direct cholangioscopy (DC) illustration of the RHA overriding the proximal common bile duct with well visible arterial pulsation has not yet been reported before. Beyond its potential visual informativeness, this uncommon cholangioscopic documentation may provide key didactic advances in terms of intraductal visualization of the anatomy of the biliary tree.
Keywords: Bile duct stricture, Cholangitis, Direct cholangioscopy, Endoscopic retrograde cholangiopancreatography, Right hepatic artery syndrome.
A 69-year-old patient presented with signs of cholangitis and underwent urgent endoscopic retrograde cholangiopancreatography (ERCP), revealing stone material in a diffusely dilated common bile duct with an indeterminate proximal bile duct stricture, although the intrahepatic ducts appeared not to be significantly dilated (Fig. 1A). Endoscopic papillotomy with partial stone extraction and insertion of a biliary plastic stent was performed. After stabilization of acute cholangitis under ceftriaxone, the patient underwent an ancillary magnetic resonance cholangiopancreatography without evidence for cholangiocarcinoma and/or a significant stricture in the hilum. Repeat ERCP, including endoscopic papillary large-balloon dilation and direct cholangioscopy (DC), using an ultra-slim upper endoscope, was performed to exclude and/or characterize the putative hilar stricture. Of note, extensive amounts of sludge and debris spontaneously drained after EPLBD up to 12 mm, potentially contributing to the initial cholangiographic presentation after upward mobilization during contrast injection (Fig. 1B). High-quality DC revealed unremarkable mucosal findings with a linear semi-concentric constriction with well reproducible arterial pulsation, highly suggestive of an overriding right hepatic artery (RHA) (Fig. 1C). However, given the only minor bile duct impression, no further interventions whatsoever were warranted.
Albeit sometimes representing a mere incidental finding on imaging studies, true RHA syndrome is recognized as an uncommon cause of non-post surgical benign bile duct stricture and may occasionally simulate malignancy.1,2 However, in this unique report, the pulsatile band-like impingement of the proximal bile duct characteristic of an RHA running in close proximity posteriorly was beyond clinical significance on follow-up evaluation; thus, surgical treatment, for example, hepaticojejunostomy, was not warranted. Notwithstanding, to the best of our knowledge, this is the first clinical report on dynamic high-definition video endoscopic visualization of a RHA overriding the proximal bile duct, unlike some reports utilizing catheter-based, single-operator cholangioscopy.3,4
Vincent Zimmer https://orcid.org/0000-0002-6298-4717
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