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Is right-sided ligamentum teres hepatis always accompanied by left-sided gallbladder? Case reports and literature review.

Authors:
Hsuan-Yin Lin Rheun-Chuan Lee

Insights Imaging 2018 Dec 19;9(6):955-960. Epub 2018 Nov 19.

Department of Radiology, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd., Beitou District, Taipei, 112, Taiwan, Republic of China.

Right-sided ligamentum teres (RSLT) hepatis is a rare anatomical variant in which the fetal umbilical vein is connected to the right paramedian trunk of the portal vein. Despite its rarity, it is crucial for surgeons and intervention specialists because of its frequent association with intrahepatic vascular and biliary anomalies. Inattention to these anomalies before intervention, especially living-donor liver transplantation, can have life-threatening consequences. The relationship between gallbladder location and RSLT is still controversial, with RSLT regarded as one of the critical features of left-sided gallbladder in most studies. According to these hypotheses, once RSLT is present, left-sided gallbladder must be found as well. Here, we report three cases in which RSLT was associated with intrahepatic portal vein anomalies. In one case, the gallbladder was left-sided, but in the other two cases, it had a normal cholecystic axis to the right of the umbilical fissure. Therefore, the relationship between RSLT and gallbladder location may require redefinition, and surgeons should be aware of vascular anomalies once RSLT has been detected, even in the absence of left-sided gallbladder or biliary anomalies. TEACHING POINTS: • Right-sided ligamentum teres (RSLT) hepatis is a rare anatomical variant, which is frequently associated with intrahepatic vascular and biliary anomalies. Previous studies had discussed the vascular anomalies in livers with RSLT. • However, no predictable correlation exists between portal vein anomalies and anomalous biliary confluences in patients with RSLT. Moreover, we found that RSLT does not always coexist with left-sided gallbladder. • Unawareness of these vascular and biliary anomalies in liver with RSLT before intervention can have life-threatening consequences. • Thus, the vascular and biliary variations should be surveyed in multimodality imaging studies such as dynamic CT, 3D magnetic resonance cholangiopancreatography, or digital subtraction angiography once the RSLT is detected before intervention.

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http://dx.doi.org/10.1007/s13244-018-0671-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6269334PMC
December 2018

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