| 单词 | fbi sign | 
| 释义 | FBI signFBI signFat-blood interface Orthopedics A semi-lunar soft tissue effusion, seen in post-traumatic lipohemarthrosis, using a 'horizontal' beam X-ray; the FS is most commonly seen in the knee and in the shoulder, because of ↑ marrow fat and blood in the joint space. | 
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