Segond Fracture with an Anterior Cruciate Ligament Tear

The “lateral capsular sign,” an elliptical-shaped skeletal fragment along the outside edge of the tibial plateau, is a characteristic of a Segond fracture usually associated with an anterior cruciate ligament (ACL) tear. Although this sign can be seen on conventional radiographs, MRI offers a more thorough evaluation of knee joint structures and verifies ACL involvement. Imaging should be used to explore for other potential injuries and diagnoses, such as the arcuate sign indicating fibular head avulsion. The best therapeutic approach requires a prompt and precise diagnosis. Surgery to correct the avulsion and ACL reconstruction are frequently used in the management of Segond fractures with ACL tears. With surgical intervention, there is a favorable prognosis.