Segond Fracture

Piran Aliabadi, MD
B Leonard Holman, MD

November 8, 1995

Presentation

Imaging Findings

Anteroposterior and lateral plain radiographs show an avulsion fracture of the lateral aspect of the proximal tibia below the articular surface (arrow). Suprapatellar soft tissue fullness is consistent with joint effusion (arrow).

Coronal T1 MRI of the knee shows an avulsion fracture of the lateral aspect of the proximal tibia (white arrow) and a linear fracture of the proximal tibia with hemorrhage and marrow edema (black arrows). On sagittal T2-weighted images, the anterior cruciate ligament is torn (white arrows). There is hemorrhage and edema in the proximal tibia (black arrow).

Diagnosis

Discussion

• Tear of the anterior cruciate ligament (75-100%).
• Injuries of the medial and lateral menisci (66-70%).
• Avulsion fracture of the fibular head.
• Avulsion fracture of the Gerdy tubercle.

The first imaging after injury of the knee is a plain radiograph. When a Segond fracture is identified on the plain film or suspected after clinical examination, MRI is indicated to evaluate the anterior cruciate ligament and possible injuries to menisci and other structures.

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