獭尾肝的影像诊断

Imaging diagnosis of beaver tail liver

目的 :探讨獭尾肝的影像标准和应用价值。方法 :回顾分析 4 4例獭尾肝的CT和MR表现。结果 :男 2 5例 ,女 19例。左肝向左伸延部分超越腋中线 ,其中 2 9例达到腋后线 ,与左外叶连接处位于左腋前线附近 ,可相对狭窄。结论 :肝左外缘向左后方延长、弯曲 ,尖端超过腋中线 ;延长部分肝组织与正常左外叶血管相连 ,平扫及增强扫描 ,与其余肝组织密度 /信号相仿 ;左叶间裂位于椎体右缘右侧等提示为獭尾肝。

Objective:To discuss and explore the applied value and imaging criterions of beaver tail liver.Methods:The CT and MR manifestation of 44 case with heaver tail liver were analyzed retrospectively.Results:Left edge exceeded left middle axillary line was found in 25 male and 19 female. The left edge reached left axillary posterior line in 29 cases. The place connecting left lateral lobe with beaver tail liver was near the left anterior axillary line,and might be relatively narrow.Conclusion:The left lateral edge extends towards left posterior and bends;its tip exceeds the middle axillary line. The hepatic tissue of the extending portion connects with the vessels of the normal left lateral lobe. The density/signal of the extending portion is similar to the rest hepatic tissues in plan scanning and strengthening scanning. That the left interlobular fissure is situated at the right margin/right side suggests it be a beaver tail liver.