Season 7 Case 20

Season 7 Case 20

History: MVA, trauma.  

Yeah, yeah, femur fracture. Is that it? What is the name for this finding?


Answer:

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Wetread Case 20 Answer

Answer: Arcuate Sign of the Knee

Avulsive fracture of the fibular head due to avulsion of the arcuate (or posterolateral) liagamentous complex. This is almost always associated with injury to the ACL so get the MRI!

reference: https://radiopaedia.org/articles/arcuate-sign-knee?lang=us