J Korean Soc Radiol.  2015 Jun;72(6):401-404. 10.3348/jksr.2015.72.6.401.

Synovial Cyst of the Hip Joint as a Rare Cause of Unilateral Leg Edema: A Case Report

• Kang J
• Chang IS
• Park SW
• Yun IJ
• Park HK
• Kim WS
• Lee HJ
• Kim NR
• Moon SG

• KMID: 2098019
• DOI: http://doi.org/10.3348/jksr.2015.72.6.401

Abstract

A synovial cyst of the hip joint is a rare cause of unilateral leg edema, and it is usually associated with arthropathies such as rheumatoid arthritis and osteoarthritis. An asymptomatic synovial cyst of the hip joint that is not associated with an arthritic condition occurs infrequently. In this paper, we described the case of a 52-year-old woman who presented with unilateral right leg edema caused by a synovial cyst of the hip joint.

MeSH Terms

Arthritis, Rheumatoid
Edema*
Female
Hip Joint*
Humans
Leg*
Middle Aged
Osteoarthritis
Synovial Cyst*
Veins

Figure

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  Fig. 1 Doppler ultrasonography shows a hypoechoic (not anechoic) mass compressing the right common femoral vein (white arrow). Note that there is no color signal that would suggest the presence of blood flow. The two color signals by the mass represent superficial (upper) and deep femoral artery (lower). DFA = deep femoral artery, SFA = superficial femoral artery

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  Fig. 2 The CT scan shows a cystic mass compressing the right common femoral vein (white arrow).

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  Fig. 3 Ascending venography (prone position) shows extrinsic compression of the right common femoral vein (white arrow). There is no evidence of deep vein thrombosis.

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  Fig. 4 The excised lesion showed a cyst with thin fibrous cyst wall. The cyst wall was lined by a layer of flat, elongated synovial cells (arrows) (hematoxylin & eosin, × 200).

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