MRI of traumatic patellar dislocation in children

Traumatic patellar dislocations (TPD) are common injuries in children, and MRI is useful in evaluation of pediatric musculoskeletal injuries. However, no pediatric studies on the MR features of TPD have been reported. To review the injuries after TPD in children. Patients with clinical or radiologic...

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Bibliographic Details
Published in:Pediatric radiology 2006-11, Vol.36 (11), p.1163-1170
Main Authors: Zaidi, Ali, Babyn, Paul, Astori, Ivan, White, Lawrence, Doria, Andrea, Cole, William
Format: Article
Language:English
Subjects:
Adolescent
Child
Female
Femur - pathology
Humans
Knee Injuries - classification
Knee Joint - pathology
Magnetic Resonance Imaging
Male
Patellar Dislocation - diagnosis
Patellar Dislocation - physiopathology
Retrospective Studies
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Summary:Traumatic patellar dislocations (TPD) are common injuries in children, and MRI is useful in evaluation of pediatric musculoskeletal injuries. However, no pediatric studies on the MR features of TPD have been reported. To review the injuries after TPD in children. Patients with clinical or radiological recognition of TPD and those with suggestive MR findings were selected. Bone, cartilage and soft-tissue injuries and patellofemoral relationships were assessed. A total of 26 patients (age range 10-18 years) were identified. The following injuries were seen: bone bruising of the inferomedial patella (81% of patients) and the lateral femoral condyle (81% of patients), cartilage injuries of the inferomedial patella (38% of patients) and the lateral femoral condyle (38% of patients), osteochondral fragments (42% of patients) and injuries of the medial patellar restraints (81% of patients). Pediatric manifestations of TPD seen on MRI are similar to those in adults. TPD is often occult in children. Early recognition of bone bruising of the patella and lateral femoral condyle, associated osteochondral injuries, and medial patellar stabilizer injury is important for timely diagnosis.
ISSN:0301-0449
1432-1998
DOI:10.1007/s00247-006-0293-0