Department of Radiology, Daping Hospital, Army Medical University, Chongqing, 400042, China.
Clinical Research Center of Imaging and Nuclear Medicine, Chongqing, 400042, China.
BMC Gastroenterol. 2021 Oct 26;21(1):404. doi: 10.1186/s12876-021-01970-8.
Duplication of the portal vein is a rare type of anatomic variant of the portal vein (PV) system that can be incidentally found and can lead to various challenges and consequences. Herein, we report an unusual case to increase our understanding of such anatomic variants.
A 67-year-old asymptomatic woman was diagnosed with a liver space-occupying lesion by ultrasonography on a routine physical examination. The laboratory examinations from a local hospital suggested that her liver function tests were normal. The liver appeared normal on pre-contrast enhanced CT images. However, there were multiple complex abnormalities of PV found on contrast-enhanced CT scans, including two independent sources of PV (duplication), preduodenal PV, circum-portal pancreas, mimic cavernous transformation, abnormal branches of PV, and transient abnormal perfusion in the left lobe of the liver. MRI showed fatty infiltration in the left lobe of the liver.
This case extends our current understanding of the anatomical variations of the PV system. Knowledge of these complex and rare anatomical variations will help clinical doctors make a confident diagnosis or assist with proper planning of a surgical procedure.
门静脉重复是门静脉（PV）系统一种罕见的解剖变异类型，可偶然发现，并可导致各种挑战和后果。在此，我们报告一例不寻常病例，以增加我们对这种解剖变异的理解。
一名 67 岁无症状女性在常规体检时经超声检查诊断为肝脏占位性病变。当地医院的实验室检查提示其肝功能检查正常。增强 CT 图像显示肝脏正常。然而，增强 CT 扫描发现门静脉存在多种复杂异常，包括两个独立的门静脉源（重复）、十二指肠前门静脉、胰周门静脉、模拟海绵样变、门静脉异常分支和左叶肝短暂异常灌注。MRI 显示左叶肝脂肪浸润。
该病例扩展了我们对门静脉系统解剖变异的现有认识。了解这些复杂和罕见的解剖变异将有助于临床医生做出自信的诊断或协助适当规划手术过程。
