Abstract
Lipoma arborescens (LA) is a rare intra-articular tumorlike lesion characterized by a diffuse villous proliferation of the synovial tissue with fatty deposits under the synovial membrane.
All joints may be affected, but the knee is the most frequently involved. Bilateral and polyarticular involvement are possible.
The pathophysiology is unclear, but LA is thought to be a reactive process, secondary to chronic inflammation or repetitive trauma.
Clinical, radiographic, and ultrasonographic findings are usually not specific but may be suggestive of the diagnosis. MRI remains the imaging modality of choice, and it is usually sufficient to confirm the diagnosis.
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Abbreviations
- CT:
-
Computed tomography
- LA:
-
Lipoma arborescens
- MRI:
-
Magnetic resonance imaging
- TGCT:
-
Tenosynovial giant cell tumor
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Chelli Bouaziz, M., Ladeb, M.F., Riahi, H. (2023). Lipoma Arborescens. In: Vanhoenacker, F.M., Ladeb, M.F. (eds) Imaging of Synovial Tumors and Tumor-like Conditions. Medical Radiology(). Springer, Cham. https://doi.org/10.1007/174_2023_416
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