MR Findings of Traumatic Transient Lateral Dislocation of the Patellae
Journal of the Korean Radiological Society
;
: 411-415, 2001.
Article
in Korean
| WPRIM
| ID: wpr-45343
ABSTRACT
PURPOSE:
To determine the magnetic resonance (MR) imaging characteristics of traumatic transient lateral dislocation of the patellae. MATERIALS ANDMETHODS:
In eight patients (6 males, 2 females, mean age 22.4 years) in whom transient lateral dislocation of the patella was diagnosed, the distinctive MR imaging findings reflecting known injury mechanism were retrospectively analyzed with regard to bone contusion, chondral defect, fracture, loose body, joint effusion, and the associated soft tissue abnormalities.RESULTS:
All of eight patients had bone contusions in the lateral femoral condyle and medial facet of the patella, while in five, chondral defects were present in this latter region. In three patients, fractures of the on lateral femoral condyle (n=2) and medial facet of the patella (n=3) were noted, and in three others, loose bodies were noted. Joint effusion [simple effusion (n=4), lipohemarthrosis (n=3)] was observed in seven patients, and associated soft tissue injuries [to the medial patellar retinaculum (n=8), patellar tendon (n=2), and anterior cruciate ligament (n=1)] in eight. Patellar subluxation was found in seven.CONCLUSION:
MR imaging is a useful technique for the diagnosis of traumatic lateral dislocation of the patella. The significant MR findings are bone contusion in the lateral femoral condyle and medial facet of the patella, chondral defect, fracture, joint effusion, injury to the medial patellar retinaculum, and patellar subluxation.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Patella
/
Magnetic Resonance Imaging
/
Retrospective Studies
/
Anterior Cruciate Ligament
/
Soft Tissue Injuries
/
Patellar Ligament
/
Contusions
/
Diagnosis
/
Joint Dislocations
/
Joint Loose Bodies
Type of study:
Diagnostic study
/
Observational study
Limits:
Female
/
Humans
/
Male
Language:
Korean
Journal:
Journal of the Korean Radiological Society
Year:
2001
Type:
Article
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