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DIAGNOSIS:

1. Avulsion injury of the fibular head (fibular collateral ligament fracture avulsion)

2. Segond fracture (ilio-tibial tract fracture avulsion of tibial plateau).

Fig. 2: Plain radiograph of the knee shows a fibular collateral ligament avulsion fracture of the fibular head (long red arrow) and a Segond fracture (small red arrow) due to an ilio-tibial tract avulsion fracture.	Fig. 3: T2W coronal MRI of the knee shows a fibular head avulsion fracture (red arrow).
Fig 4: STIR coronal of the knee shows the classic Segond fracture (red arrow)

The plain radiograph shows two fracture fragments (Fig. 2), both of which represent avulsion fractures, one of the fibular collateral ligament (Figs. 2, 3) and one of the ilio-tibial tract, also called the Segond fracture (Figs. 2, 4).

These together constitute a postero-lateral corner (PLC) injury. This patient also had a PCL avulsion fracture and a comminuted fracture of the patella.

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PubMed References for Avulsion injury of the fibular head & Segond fracture

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Ajitsinh Jemalbhai Vahder

Amaresh Hombal

Amarnath C

Amogh Hegde

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Kabilan Chokkappan

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N.B.S.Mani

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