Imaging Analysis of Pseudolesion Caused by Abnormal Gastric Venous Drainage
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摘要: 目的：分析由异常胃静脉引流所致肝岛影像学特征及其形成相关机制。方法：回顾性分析15例异常胃静脉引流所致肝岛的影像学特征。结果：15例肝岛均境界清晰，异常胃静脉直径为1.5~6 mm。14例由胃右静脉引流，其中3例肝岛位于Ⅰ段，4例位于Ⅲ段，6例位于Ⅳ段背侧，1例位于左半肝；1例胃左静脉引流，肝岛位于Ⅲ段。15例中，11例呈肿块样外观（5例类圆形，6例楔状）；2例位于Ⅰ段者与尾状叶形态几乎一致，且同时伴有尾状叶不同程度肥大；1例占据左半肝；1例沿引流静脉呈不规则“爪形”改变。结论：肝岛形成与异常胃静脉引流相关，充分掌握其影像学特征，即可作出正确诊断。Abstract: Objective:To analyze the imaging features of focal sparing in fatty liver caused by abnormal gastric venous drainage and its formation mechanism. Methods:The imaging features of pseudolesion caused by abnormal gastric venous drainage in 15 cases were analyzed retrospectively. Results:All the 15 cases had clear boundary, and the diameter of abnormal gastric vein ranged from 1.5 to 6 mm. In 14 cases, the right gastric vein was used to drain the liver, among which 3 cases were located in segment Ⅰ, 4 cases were located in segment Ⅲ, 6 cases were located in segment Ⅳ dorsal, and 1 case occupied the left liver. The left gastric vein was draining in 1 case, and the focal sparing was located in segment Ⅲ. Among the 15 cases, 11 cases had the appearance of mass(5 cases were round and 6 cases were wedge-shaped). The 2 cases located in segment Ⅰ were almost identical with caudate lobe, and were accompanied by different degrees of caudate lobe hypertrophy. One case occupied the left liver; one case presented irregular "claw-like" changes along the draining vein. Conclusion:The formation of focal sparing in fatty liver is related to abnormal gastric venous drainage, the correct diagnosis can be made by fully grasping the imaging characteristics.
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Keywords:
- abnormal gastric venous drainage /
- tomography /
- X-ray computer
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