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1.  Osteochondral Avulsion Fracture of the Anterior Cruciate Ligament Femoral Origin in a 10-Year-Old Child: A Case Report 
Journal of Athletic Training  2011;46(4):451-455.
Objective:
To describe the case of a 10-year-old football player who sustained a comminuted osteochondral avulsion fracture of the femoral origin of the anterior cruciate ligament (ACL) via a low-energy mechanism.
Background:
In children, both purely cartilaginous and osteochondral avulsion fractures have been described; most such ACL avulsions are from the tibial eminence. In the few previous case reports describing femoral osteochondral avulsion fractures, high-energy injury mechanisms were typically responsible and resulted in a single fracture fragment.
Differential Diagnosis:
Femoral osteochondral avulsion fracture at the ACL origin, femoral cartilaginous avulsion fracture at the ACL origin, midsubstance ACL tear, meniscal tear.
Treatment:
Sutures and a button were used to repair the comminuted fragments. Postoperatively, a modified ACL reconstruction rehabilitation program was instituted.
Uniqueness:
Most injuries of this nature in youngsters are caused by a high-energy mechanism of injury, result in an osteochondral avulsion fracture of the tibial eminence, and involve a single fracture fragment.
Conclusions:
Although they occur infrequently, ACL femoral avulsion fractures in children can result from a low-energy injury mechanism. Identifying the mechanism of injury, performing a thorough physical examination, and obtaining appropriate diagnostic studies will enable the correct treatment to be implemented, with the goal of safely returning the athlete to play.
PMCID: PMC3419159  PMID: 21944079
injury mechanisms; knee injuries; pediatric injuries

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