(Fig 4-B.15) Patellar Tendon Partial Tear

https://youtu.be/JLY0rnEmz4o

https://youtu.be/w63GyfUeIyw

 

 

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📌 Patellar Tendon Partial Tear

 

✅ Mechanism of Injury

• Overuse Injuries: Lead to focal tears due to repetitive microtrauma.
• Acute Tears: Result from sudden, high-velocity eccentric contraction of the quadriceps femoris, especially in a flexed knee, commonly in men under 40.
• Athletes, particularly football players, are at a higher risk due to direct impacts to the anterior knee.

 

✅ Risk Factors

1. Chronic Microtrauma and Tendinopathy
2. Previous Tendon Graft Harvest for ACL Repair
3. Prolonged Steroid Use
4. Systemic Diseases: Chronic renal failure, diabetes, rheumatoid arthritis

 

✅ Clinical Presentation and Diagnosis

• Complete Tears: Less common than partial tears, typically at the patellar attachment, but can occur in the midsubstance, tibial tuberosity, or be multifocal.
• Imaging (MRI): Shows discontinuity of the tendon and extensive edema in acute tears.
• Patella Baja: Low-lying patella with shortened tendon seen post knee trauma or surgery.

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References:

1. Clin Sports Med. 2014 Jul;33(3):413-36
2. Radiographics. 2009 May-Jun;29(3):877-86
3. Magn Reson Imaging Clin N Am 22 (2014) 601–620
4. RadioGraphics 2018; 38:2069–2101

 

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#PatellarTendonTear, #SportsInjuries, #Radiology, #Musculoskeletal, #ACLRepair, #MRIImaging, #Orthopedics, #TendonInjury, #AthleteCare, #KneeTrauma