Lipohemarthosis
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Lipohemarthrosis results from the extrusion of fat and blood from bone marrow into the joint space after an intraarticular fracture. Lipohemarthrosis is most common in knee fractures, especially tibial plateau fractures.
Diagnosis
The imaging findings are
- Because fat floats on the associated blood, a fat-fluid level is present and may be shown on radiographs when the image is taken with a horizontal beam.
- Both CT and MRI can provide a more specific assessment than conventional radiography of the composition of joint effusions.
Patient #1: Lateral tibial plateau fracture
Patient #2: MRI image demonstrates an ankle lipohemarthrosis