(Fig 4-C.03) Post-traumatic Lesions of Hoffa’s Fat Pad

https://youtu.be/8H6LIuFWjlA

https://youtu.be/EiNzQqJbmYs

 

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📌Post-traumatic Lesions of Hoffa’s Fat Pad

 

✅ Fractures and Shear Injuries

• Fractures near Hoffa’s fat pad, including patellar, tibial, and femoral condylar fractures, often show reactive edematous changes due to shear injury or direct impact. 
• Shear injury in Hoffa’s fat pad is also associated with ACL injuries (1).

 

✅ Acute Injury Associations

• Acute injuries to Hoffa’s fat pad are typically linked to other anterior knee injuries, such as patellar tendon tears, patellar sleeve injuries, patellofemoral dislocations, or patellar fractures. 
• Patellar dislocations can cause partial tears at the superomedial border. 
• Complete tearing of the fat pad is rare without severe trauma (2).

 

✅ Inflammation and Arthrofibrosis

• Both acute and chronic traumas can lead to local bleeding and inflammation, the main causes of Hoffa’s fat pad-related pain. 
• These injuries can result in arthrofibrotic lesions, such as post-traumatic or post-arthroscopic fibrosis (3).

 

✅ Hemarthrosis and ACL Tears

• Hemarthrosis from acute ACL tears is characterized by synovitis with an irregular free concave edge of Hoffa's fat pad. 
• Shearing injuries to the fat pad can also result in fractures, often seen with ACL tears (4, 5).

 

References

1. Indian J Radiol Imaging. 2021 Nov 30;31(4):961-974.
2. RadioGraphics 2018; 38:2069–2101.
3. Insights Imaging (2016) 7:373–383.
4. Stoller's Orthopaedics and Sports Medicine: The Knee.
5. World J Orthop. 2011 Aug 18;2(8):75-84.

 

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#HoffasFatPad, #KneeInjury, #ACLtear, #PatellarFracture, #KneeTrauma, #Arthrofibrosis, #Hemarthrosis, #ShearInjury, #Orthopedics, #Radiology