Third Department of Surgery, Tokyo Medical University, Tokyo 160-0023, Japan.
World J Gastroenterol. 2012 Jul 28;18(28):3761-4. doi: 10.3748/wjg.v18.i28.3761.
Type IV-A choledochal cysts (CCs) are a congenital biliary anomaly which involve dilatation of the extrahepatic and intrahepatic bile ducts. We present the case of a 30-year-old woman with type IV-A CC, on whom three-dimensional computed tomography (3D CT) and virtual endoscopy were performed. 3D CT revealed partial dilatation in the posterior branch of the intrahepatic bile duct and a relative stricture between it and the extrahepatic bile duct. Virtual endoscopy showed that this stricture was membrane-like and separated from the surrounding blood vessels. Based on these image findings, complete cyst resection, bile duct plasty for the stricture, and hepaticojejunostomy were safely performed. To the best of our knowledge, there are no reports of imaging by virtual endoscopy of the biliary tract which show the surrounding blood vessels running along the bile duct.
IV-A 型胆总管囊肿（CC）是一种先天性胆管异常，涉及肝外和肝内胆管的扩张。我们报告了一例 30 岁女性 IV-A 型 CC 的病例，对其进行了三维计算机断层扫描（3D CT）和虚拟内镜检查。3D CT 显示肝内胆管后支部分扩张，且与肝外胆管之间相对狭窄。虚拟内镜检查显示该狭窄呈膜状，与周围血管分离。基于这些影像学表现，安全地进行了完全囊肿切除、狭窄胆管成形术和胆肠吻合术。据我们所知，尚无胆管虚拟内镜显示周围血管沿胆管走行的影像学报告。
