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Posterior cruciate ligament avulsion from the tibia
4%
33/736
Anterior cruciate ligament avulsion from the tibia
81%
599/736
Avulsion of the lateral meniscus anterior horn
3%
23/736
Midsubstance posterior cruciate ligament rupture
Midsubstance anterior cruciate ligament rupture
7%
53/736
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The radiographs and MRI scans both show an avulsion of the anterior cruciate ligament, which has been described by Meyers and McKeever in three different fracture patterns. Type I fractures are nondisplaced or have minimal displacement of the anterior margin. Type II fractures have superior displacement of their anterior aspect with an intact posterior hinge. Type III fractures are completely displaced. Although the injury is visible on the radiographs, it is more subtle in adults than children. Thus, MRI is helpful in clarifying this injury in adults. Open or arthroscopic reduction and internal fixation is recommended for type II and type III fractures that do not respond to closed reduction.
2.9
(9)
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