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Renal Medullary Ischemia
Joseph Junewick, MD FACR
over 7 years ago
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Case History

10 year old soccer player with posttraumatic knee pain.

Case Detail

Anatomy: Musculoskeletal
Joseph Junewick, MD FACR
Diagnostic Category: Trauma
Created: over 6 years ago
Updated: over 6 years ago
Tags: PEDS
Modality/Study Types: CR
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Reveal Findings

CR – Nondisplaced transverse fracture of the entire tibial eminence.

Reveal Discussion

Although most ACL tears involve the midsubstance of the ligament, avulsion of its tibial attachment occurs fairly commonly in skeletally immature patients. Tibial eminence fractures are most commonly seen in children and adolescents aged 8 to 14 years. The tibial eminence is a nonarticular portion of the proximal tibia that lies between the condylar surfaces of the medial and lateral tibial plateau. Displaced fractures of the tibial eminence may result in loss of biomechanical function of the ACL, leading to instability. It is thought that tibial eminence fractures are caused by slower loading conditions than midsubstance ACL tears. A smaller ratio of the notch width to the width of the distal femur may predispose children to this injury. The Meyers and McKeever classification system is descriptive with clinical implications: Type I fractures are nondisplaced, with excellent bony apposition and the potential for healing, Type II fractures are characterized by anterior cortical displacement, with an intact posterior cortex acting as a hinge. Type III fractures are completely displaced and devoid of bony apposition (Type IIIA involves only the ACL footprint whereas Type IIIB involves the entire tibial eminence), Type IV is comminuted. Type I injuries are treated conservatively. Types II, III and IV require internal fixation.

Reveal Diagnosis

Tibial Eminence Fracture

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