Volume 26, Issue 120, February 2022

Lipoma Arborescens: A rare case report

Ali Hassan A Ali^1,2♦, Omar O Serhan³, Mohamed Manaa⁴, Abdulrahman M Alkassar Alanazi⁵, Abdulaziz M M Alshamrani⁵, Salem Hamad Aldosari⁵

¹Anatomy Department, College of Medicine, Prince Sattam Bin Abdulaziz University, Alkharj 11942, KSA
²Anatomy Department, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
³Radiology Department, King Khalid Hospital, Al-Kharj, KSA
⁴Rheumatology Consultant, King Khalid Hospital, Al-Kharj, KSA
⁵College of Medicine, Prince Sattam Bin Abdulaziz University, Al-Kharj, KSA

^♦Corresponding author
Anatomy Department, College of Medicine, Prince Sattam Bin Abdulaziz University, Alkharj 11942, KSA

ABSTRACT

Introduction: Lipoma arborescens is a rare condition of unknown cause. It is characterized by proliferation of the synovium with replacement of the sub synovial tissue by mature fat cells. The knee joint is the most commonly affected. Involvement of other joints has been announced such as elbow and shoulder. Case presentation: We are describing a case of 49-years old female diabetic patient who came to the rheumatology clinic of King Khalid Hospital in Al-Kharj with a two-year history rheumatoid arthritis and treated with methotrexate. In addition, she had a right knee arthroscopy and synovectomy for “pigmented villonodular synovitis”. Thereafter, the patient came in the outpatient clinic with a swollen knee. At examination, she has arthritis of the ankles and the wrists and a swollen right knee. Laboratory investigations show elevated inflammatory markers and normal liver and renal panels. An MRI of the right knee was ordered. Discussion and conclusion: In this case; we focus attention on is an extremely uncommon condition; lipoma arborescens. The clinical findings and imaging are characteristics by highlighting the role of MRI, in diagnosis of other, intra-articular pathological masses. The treatment of choice in lipoma arborescens is open synovectomy.

Keywords: knee joint; lipoma; magnetic resonance imaging, tumor, synovium

Medical Science, 2022, 26, ms49e2070

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DOI: https://doi.org/10.54905/disssi/v26i120/ms49e2070

Published: 29 January 2022