ACL Tear
Understanding ACL Tear found on Knee Magnetic Resonance Imaging imaging. Learn what this finding means and what steps to take next.
Radiographic Appearance
Magnetic Resonance Imaging FindingDiscontinuous or lax low-signal ACL fibers with abnormal orientation; bone contusions at lateral femoral condyle and posterolateral tibia.
Clinical Significance
Key stabilizer injury leading to instability and cartilage damage if untreated.
What is an ACL Tear?
Injury of the anterior cruciate ligament, common in pivoting sports. MRI is the gold standard for grading.
Imaging Appearance
- Fiber discontinuity or wavy ligament
- Pivot-shift bone bruises
- Anterior tibial translation
- Associated meniscal or collateral injuries
Clinical Significance
- Leads to knee instability and meniscal degeneration
- Surgical reconstruction often recommended for active patients
Symptoms
- Pop at injury, swelling, giving-way
Diagnosis
- MRI knee without contrast
- Clinical tests: Lachman, pivot-shift
Treatment
- Physical therapy; bracing
- ACL reconstruction for instability or high-demand athletes
Prognosis
- Good with rehab/reconstruction; risk of osteoarthritis over time
What Should You Do?
- Rest/ice early; seek orthopedic evaluation.
- Begin rehab to restore motion and strength.
- Discuss surgery timing if instability persists.
Medical Disclaimer: Educational only; follow orthopedic guidance.
Correlate with Lab Results
Doctors often check these blood tests when ACL Tear is found on imaging:
Related Imaging Terms
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