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Lipoma arborescens: a rare cause of clicking in the knee
  1. Mithun Nambiar1,2,
  2. James Randolph Onggo1 and
  3. Anthony Jacobson1
  1. 1 Department of Orthopaedic Surgery, Eastern Health, Victoria, Australia
  2. 2 Department of Surgery, The University of Melbourne, Parkville, Victoria, Australia
  1. Correspondence to Dr Mithun Nambiar, mithunnambiar1{at}


Lipoma arborescens (LA) is a rare condition with synovial membrane lipomatous proliferation. It most commonly affects the knee joint, in the suprapatellar pouch. It can present as a painful knee with an effusion. Diagnosis is via MRI demonstrating a synovial mass with frond-like appearance, and histology showing mature adipose cells, with an overlying synovial membrane. Treatment options include non-operative measures with analgesia, or operative intervention to resect the lesion. We describe a unique case of LA present in the anterolateral knee joint, presenting with persistent painful clicking in the knee. The patient underwent an open total resection of the lesion, with resolution of symptoms.

  • orthopaedic and trauma surgery
  • orthopaedics
  • knee injuries
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  • Patient consent for publication Obtained.

  • Contributors This statement is to certify that all authors have contributed to the case report in one way or another. MN - data collection, literature review and write up. JRO - data collection and write up. AJ - data collection and write up.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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