This magnetic resonance imaging (MRI) scan in sagittal view demonstrates a lobulated mass extending down from the level of L4.

矢状面MRI显示分叶状肿块从第四胸椎（L4）水平向下延伸。

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This magnetic resonance imaging (MRI) scan in sagittal view demonstrates a lobulated mass extending down from the level of L4.

矢状面MRI显示分叶状肿块从第四胸椎（L4）水平向下延伸。

youdao