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Lipoma Arborescens of the Knee Treated with Arthroscopic SynovectomyA Case Report and Review of the Literature
Andrzej Jurkiewicz, MD, PhD1; Przemysław Krakowski, MD1; Agnieszka Korolczuk, MD, PhD2
1 Orthopaedic Department, 21-010 Leczna, 52 Krasnystawska, Leczna Hospital, 20-015, Lublin, Poland. E-mail address for A. Jurkiewicz: jurkiewicz16@wp.pl. E-mail address for P. Krakowski: przemyslaw.krakowski84@gmail.com
2 Department of Clinical Pathomorphology, Medical University of Lublin, 8 Jaczewskiego, 20-950, Lublin, Poland. E-mail address: korolczuk.agnieszka@wp.pl
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Investigation performed at Orthopaedic Department, Łęczna Hospital, Lublin, Poland



Disclosure: None of the authors received payments or services, either directly or indirectly (i.e., via his or her institution), from a third party in support of any aspect of this work. None of the authors, or their institution(s), have had any financial relationship, in the thirty-six months prior to submission of this work, with any entity in the biomedical arena that could be perceived to influence or have the potential to influence what is written in this work. Also, no author has had any other relationships, or has engaged in any other activities, that could be perceived to influence or have the potential to influence what is written in this work. The complete Disclosures of Potential Conflicts of Interest submitted by authors are always provided with the online version of the article.

Copyright © 2012 by The Journal of Bone and Joint Surgery, Inc.
JBJS Case Connector, 2012 Sep 26;2(3):e53 1-4. doi: 10.2106/JBJS.CC.K.00115
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Extract

Lipoma arborescens, or diffuse articular lipomatosis, is a rare intra-articular benign lesion of unknown etiology. According to the World Health Organization, it is classified as a tumorlike condition. The most common location of this lesion is the knee, where it usually affects the suprapatellar pouch. Reports of other locations of the lesion, including the ankle, hip, shoulder, wrist, or elbow, can be found in the literature1-8. Lipoma arborescens most frequently affects one joint. However, bilateral and multifocal joint involvement have been reported, with most of the reports involving the knee9-13. Histologically, it represents a hyperplastic condition in which proliferation of the synovial membrane and diffuse replacement of the subsynovial tissue by mature fat cells is observed. Therefore, it results in formation of villous projections that occupy the joint. We present the case of a young woman with lipoma arborescens in the knee joint, which was treated with arthroscopic synovectomy. She was informed that data concerning her case would be submitted for publication, and she provided consent.
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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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