(Fig 5-D.06) Polyethylene Wear–Induced Synovitis

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📌 Polyethylene Wear-Induced Synovitis

 

• Polyethylene wear-induced synovitis is commonly observed in patients with joint replacements, particularly those involving polyethylene components. 
• This condition is characterized by an inflammatory response due to the wear particles generated from polyethylene components.

 

✅ MRI Findings

• A recent study noted that more synovial proliferation on MRI corresponded with greater polyethylene wear. 
• In addition to frondlike synovial proliferation and thickened synovium, intermediate signal intra-articular debris can also be seen in polyethylene wear–induced synovitis. 

 

Characteristics of polyethylene wear–induced synovitis

• Frond-like Synovial thickening
• Dense synovial proliferation
• Debris with low-to-intermediate signal intensity (similar to the intensity of skeletal muscle)
• Variable amounts of interspersed fluid and joint distention

These characteristics help distinguish polyethylene wear-induced synovitis from other types of synovitis 

 

References

1. Semin Musculoskelet Radiol 2019;23:e20–e35.
2. RadioGraphics 2015; 35:1483–1501.
3. Radiology 2016; 281:1–8.

 

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