Location

Knee

Diagnosis

Lipohemarthrosis

Discussion

Fat fluid interface seen on the multiple lateral radiographs of the knee secondary to lipohemarthrosis. The fat-blood interface (FBI) is a very suggestive sign of underlying fracture extending into the joint. If no fracture is readily identified, diligent search should be undertaken.

Reference

Wenzel WW: The FBI sign Rocky mountain Med J 1972, 69:71-72.

Figures

Click thumbnail for larger image

Attachments:


kneelipohem2.jpg (image/jpeg)


kneefbi.jpg (image/jpeg)