Unilateral Lower Limb Swelling Caused by a Synovial Cyst of the Hip Joint

Hsiao-Ting Huang ^a, I-Chen Tsai ^{a, b},  Shao-Bin Cheng ^{c, d}, Clayton Chi-Chang Chen ^{a, e}

^aDepartment of Radiology, Taichung Veterans General Hospital, Taichung, Taiwan
^bFaculty of Medicine and Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
^cDivision of General Surgery, Department of Surgery, Taichung Veterans General Hospital, Taichung, Taiwan
^dDepartment of Surgery, Faculty of Medicine, Chung-Shan Medical University, Taichung, Taiwan
^eDepartment of Radiological Technology, Central Taiwan University of Science and Technology, Taichung, Taiwan

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Abstract

A 54-year-old woman with a history of severe rheumatoid arthritis presented with painful swelling of the left lower limb. Computed tomography showed a large synovial cyst of the underlying hip joint with femoral vein compression. We also observed proximity of the cyst to the surrounding structures and communication between the cyst and the hip joint cavity.

Keywords

Computed tomography; Femoral vein compression; Leg edema; Synovial cyst