ArticleJournal of orthopaedic case reports2026
Lipoma Arborescens of the Knee: An Intraoperative Mimicker of Pigmented Villonodular Synovitis in Bilateral Knee Osteoarthritis - A Case Report.
Article in Journal of orthopaedic case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors.
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Abstract
Introduction: Lipoma arborescens (LA) is a rare benign synovial lesion characterised by villous fatty proliferation. Intraoperatively, it may mimic pigmented villonodular synovitis (PVNS) due to a similar frond-like, vascular synovial appearance. Case Report: We report a 74-year-old male with bilateral grade 4 knee osteoarthritis who underwent total knee arthroplasty. Diffuse villous synovial tissue was encountered intraoperatively, with unexpected bleeding despite tourniquet use. Histopathology confirmed LA. Intra-articular administration of tranexamic acid effectively controlled the bleeding. Conclusion: The clinical outcome is favorable in most cases, unlike with PVNS.
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