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DICOM HelpSource: Local (us-east1-c)
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Demographics:
13 years old, Male
Indication:
Knee injury
Findings
- Moderate lipohemarthrosis
- No acute fracture or malalignment
Diagnosis
Lipohemarthrosis
Sample Report
Moderate lipohemarthrosis. While no acute fracture is identified, lipohemarthrosis raises concern for occult fracture. Consider CT or MRI for further evaluation.
No malalignment.
Discussion
- Often results from an intra-articular fracture resulting in release of fat ("lipo") and blood ("hemo") into the joint space
- Look for a layering fat-fluid level on cross table lateral view
- When you see lipohemarthrosis and don't see a fracture, always raise the possibility of an occult fracture and suggest CT or MRI for further evaluation
Annotated Images & Illustrations
Red arrows: fat fluid level indicating a lipohemarthrosis.
Followup knee MRI in this patient shows a large medial femoral condyle bone contusion without clear fracture line.