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📌 Posterior Suprapatellar (Prefemoral) Fat Pad
- The posterior suprapatellar (prefemoral) fat pad can be a source of chronic anterior knee pain, particularly proximal to the superior pole of the patella.
- This condition may cause intermittent mechanical symptoms, such as a catching sensation during motion, when the fat pad snaps over the femoral condyles.
✅Chronic Impingement
- Chronic impingement of the prefemoral fat pad can lead to nonencapsulated fibrosis, which can result in intermittent catching sensations during movement .
- However, the association between pre-femoral fat pad edema and anterior knee pain is controversial, as it can also be an asymptomatic finding in high-level athletes .
✅ Patterns of Edema
Two different patterns of edema have been described within the pre-femoral fat pad :
1️⃣ Superior Aspect Close to the Midline
- Edema at the superior aspect close to the midline is believed to be caused by impingement due to a prominent suprapatellar osteophyte. This can lead to scalloping of the anterior femur and fibrous or cartilaginous metaplasia .
2️⃣ Inferolateral Part of the Fat Pad
- Edema in the inferolateral part of the fat pad is associated with patellar tendon-lateral femoral condyle friction syndrome, where impingement occurs between the superior aspect of the patella and the distal femur .
References
- Magn Reson Imaging Clin N Am 22 (2014) 725–741
- RadioGraphics 2018; 38:2069–2101
- Skeletal Radiology (2020) 49:823–836
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#KneePain, #FatPadImpingement, #AnteriorKneePain, #MRI, #Radiology, #PrefemoralFatPad, #KneeInjury, #SportsMedicine, #ChronicPain, #Orthopedics
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