Hip synovial cysts are rare. However, in patients with Rheumatoid Arthritis (RA) they present in higher frequency than in general population.  Herein, we present an unusual case of a 67-year-old man with RA that presented with unilateral leg oedema and Deep Vein Thrombosis (DVT). Computed tomography (CT) scan revealed a giant cystic lesion adjacent to the right hip joint with longitudinal diameter of 14 cm. Magnetic Resonance Imaging (MRI) confirmed the characteristics of the cyst. Interestingly enough, there was evidence of osteonecrosis of the femoral head. CT guided Fine Needle aspiration (FNA) of the fluid revealed fluid consistency similar to synovial fluid, while it excluded infectious process and malignancy. Patient was finally treated with total hip arthroplasty 3 months after the initiation of low molecular weight heparin (LMWH) in treatment dose.

Cite this article as: Syrmou V, Koutalos AA, Karapli M, Alexiou I, Katsiari CG, Bogdanos DP, Simopoulou T. Giant Hip Synovial Cyst Causing Deep Vein Thrombosis and Femoral Head Osteonecrosis in a Rheumatoid Arthritis Patient. Mediterr J Rheumatol 2022;33(3):328-32.

Article Submitted: 20 Jan 2022; Revised Form: 30 May 2022; Article Accepted: 15 Jun 2022; Available Online: 30 Sep 2022

https://doi.org/10.31138/mjr.33.3.328

This work is licensed under a Creative Commons Attribution 4.0 International License.

©Syrmou V, Koutalos AA, Karapli M, Alexiou I, Katsiari CG, Bogdanos DP, Simopoulou T.