变异右肝管横跨与左肝管汇合的解剖学特点和临床意义

目的探讨变异右肝管横跨与左肝管汇合的解剖学特点和临床意义。方法回顾性分析经胆道影像学检出的52例变异右肝管横跨与左肝管汇合病例的临床经过和手术情况，并对其中部分特殊病例进行了随访。结果变异右肝管结石60．52％（23／38）]和左肝管结石86．84％（33／38）]的比例较高，伴随的胆管扩张和狭窄也较多见。变异导致的胆汁流体力学紊乱和血管鞘压迫可能是感染和结石高发的原因。变异右肝管的结石漏诊率为34．78％（8／23），结石残留比例高达86．95％（20／23）。1例在行左半肝切除时不慎将变异右肝管切断。结论变异右肝管横跨与左肝管汇合有易发生肝内胆管结石的倾向，其诊断治疗有其特殊性及困难性，应引起临床重视。

Variant Right Intrahepatic Bile Duct Joining to Left Bile Hepatic Duct Near Umbilical Portion:Its Anatomic Feature and Clinical Significance

Objective To investigate the anatomic feature and special clinical manifestations of variant right intrahepatic bile duct draining into left hepatic bile duct near the umbilical portion. Methods Variant right intrahepatic bile ducts joining into left hepatic bile ducts near the umbilical portions were identified through cholangiograms in 52 patients, who were included in this study. Their history, clinical process and operations were reviewed. Results There were total 38 cases of intrahepatic gallstone in this group. High incidence of intrahepatic calculi was found in variant right intrahepatic bile ducts (23/38 cases, 60.52%) and left hepatic ducts (33/38 cases, 86.84%). Most of these cases were accompanied with dilatation and stricture of bile ducts in these area. The gallstones in the variant right intrahepatic bile ducts were not detected in 8 cases (8/23) and the rate of residual gallstone was as high as 86.95%(20/23). Injury of variant right intrahepatic bile duct took place when left hepatectomy was performed in one case. Conclusion Gallstone is very likely to be formed in the variant right intrahepatic bile duct due to derangement of bile hydrokinetics and compression of blood vessel. Special attention should be paid to the diagnosis and operation of this abnormity.