PMC4898008_01
19-year-old male with Segond fracture. AP (top) and lateral (above) radiographs show femoral and tibial tunnels from prior ACL reconstruction. A small osseous fragment is adjacent to the lateral tibial plateau (arrow), compatible with a Segond fracture or lateral capsular avulsion.
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ACL reconstruction and a joint effusion. A small osseous fragment adjacent to the lateral tibial plateau compatible with a Segond fracture (arrow, Fig. 1) was noted.
19-year-old male with Segond fracture. Proton-density images with fat saturation after most recent injury. Top: The lateral capsular avulsion can be observed on the coronal image (arrow). The edema in the lateral tibial plateau indicates that this is an acute injury. Above: The absence of normal low signal intensity at the ACL graft is evident in the sagittal image, showing tear of the ACL graft (arrow).
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MRI also showed ACL graft tear by the absence of low signal intensity expected in the region of ACL (Fig. 2).
19-year-old male with Segond fracture. Proton density images with fat saturation at the time of original injury four years prior. Top: The disruption of the ACL is evident on the sagittal image (arrow). Above: The lateral capsular insertion (arrow) is normal on the coronal image.
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For comparison, the MRI after the original injury (Fig. 3) shows no capsular insertion damage, while it does show the original ACL tear.