Lipoma arborescens forms part of the differential diagnosis of a chronic joint swelling; including pigmented villonodular synovitis, synovial osteochondromatosis, rheumatoid arthritis, intra-articular or synovial lipoma, synovial hemangioma, amyloid arthropathy, and xanthoma.
Intra-articular lipoma can be differentiated from lipoma arborescens based on its macroscopic and microscopic features.
On MRI, the signal intensity of it is similar to that of lipoma arborescens, but because of the cartilaginous nature of the lesion and the extent of the ossified or calcified regions, the signal intensity usually varies.
Furthermore, lipoma arborescens usually arises in the suprapatellar pouch, whereas a synovial hemangioma is primarily found in the infrapatellar pad [22, 28].
When affecting multiple joints, lipoma arborescens can mimic rheumatoid arthritis; but history, physical examination, laboratory tests, and radiography allow us to distinguish between rheumatoid arthritis and lipoma arborescens .
Temporary relief of lipoma arborescens symptoms maybe achieved with an intra-articular injection of corticosteroids, but the recommended treatment for symptomatic lipoma is surgical resection (synovectomy) by open arthrotomy or arthroscopy .
described a case of lipoma arborescens that was successfully treated by yttrium-90 radiosynovectomy.
Lipoma arborescens is a rare intra-articular condition, characterized by villonodular proliferation of the synovium.
Alkhulaifi, "Bilateral lipoma arborescens of the subdeltoid bursa," Australasian Radiology, vol.
Fernandes, "Polyarticular lipoma arborescens with inflammatory synovitis," Journal of Clinical Rheumatology, vol.
Munk, "Bilateral lipoma arborescens associated with early osteoarthritis," European Radiology, vol.
Rannou, "The role of magnetic resonance imaging for the diagnosis of lipoma arborescens in polyarthritic patients with persistent single-joint effusion," Journal of Clinical Rheumatology, vol.