结论：掌握网膜囊上隐窝与肝尾状叶的位置关系对肝尾状叶周围的积液和肿块的诊断具有重要的影像学意义。

Conclusion: Mastering the positional relation of superior recess of lesser sac to caudate lobe of liver is essential to diagnose hydrops and masses involving caudate lobe of liver.

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结果：探明了网膜囊上隐窝的周界，尤其是网膜囊上隐窝和肝尾状叶的关系。

Results: the perimeter of omental bursa, especially, the relation of superior recess of lesser sac to caudate lobe of liver was indicated.

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