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6 - Villous lipomatous proliferation of the synovium (Lipoma Arborescens)
Fevziye Kabukçuoğlu, Yavuz Kabukçuoğlu, Nedim Polat, Damlanur Sakız, Raffi Armağan, Ünal Kuzgun
Subjective: Lipoma arborescens is villous lipomatous proliferation of the synovium. It is a rare lesion of the suprapatellar pouch. The clinical and histopathological features and differential diagnosis of lipoma arborescens is discussed in the study.
Study Design: Eleven cases of lipoma arborescens, diagnosed and treated in our clinic are included in the study. Synovectomy was performed directly in four cases and following biopsy result in five cases. Total knee prosthesis was applied in two cases with severe arthrosis. Histopathological evaluation of the biopsy and operation materials were made.
Results: Ten of the patients were female and one was male. The mean age of the patients was 55.3. Six were localized in the right knee and five were in the left knee. Radiographs of two cases showed severe atrhrosis and six cases showed slight arthrosis. Histopathological examination revealed villous proliferation of the synovium infiltrated with mature adipose cells. One of the cases recurred after six months and was treated with subtotal synovectomy. A mean four-year follow-up of the other cases showed no recurrence.
Conclusion: In patients with recurring synovitis, lipoma arborescens must be considered. The treatment of this rarely recurring lesion is synovectomy.
Keywords: Lipoma arborescens, synovium
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