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Concomitant lipoma arborescens and synovial osteochondromatosis of the knee

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A Correction to this article was published on 25 April 2022

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Intra-articular masses are not a rare finding in routine imaging. This is particularly true in patients with underlying joint diseases such as degenerative arthritis. Nevertheless, concomitant presentation is rather uncommon in imaging studies. The authors report an unusual concomitant lipoma arborescens and synovial osteochondromatosis (which has not previously been reported in the literature to the best of the authors’ knowledge) in a man in his 60 s with a long-standing history of knee osteoarthritis. In this case presentation, we review the differential diagnosis for noninfectious synovial proliferative disorders presenting as intra-articular masses, their potential association with underlying joint pathology, and discuss the key imaging features and appropriate treatment.

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Authors and Affiliations



All authors made substantial contributions to all four categories established by the International Committee of Medical Journal Editors ( including (1) conception and design, acquisition of data, or analysis and interpretation of data, (2) drafting the article or revising it critically for important intellectual content, (3) final approval of the version to be published, and (4) agree to be accountable for all aspects of the work if questions arise related to its accuracy or integrity. More specifically, ST, LD, DM, and AG prepared all radiological images and legends. QH prepared macroscopic and histological specimen images and legends, and description of histopathological findings in the case report manuscript. Ali Guermazi, as the corresponding author, hereby verifies each author’s contribution.

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Correspondence to Ali Guermazi.

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The privacy officer at our institution was presented with the de-identified images and the manuscript and subsequently delivered a written approval for the publication of the materials. HIPAA requirements were followed. Informed consent was not required.

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One author (initials blinded for review) reports a conflict of interest that is unrelated to the submitted work: he is a shareholder of BICL, LLC, and a consultant to Pfizer, Novartis, Regeneron, AstraZeneca, Merck Serono, and TissueGene. All other authors have no conflict of interest.

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The original version of this article was revised. The correct name of the first author should be: Sofia Takkal.

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Takkal, S., Diaz, L., Manuel, D. et al. Concomitant lipoma arborescens and synovial osteochondromatosis of the knee. Skeletal Radiol 51, 2211–2216 (2022).

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