Synovial cysts of the proximal tibiofibular joint: three case reports.
Synovial cysts are fluid-filled masses lined with synovium and located within or about joints. The main symptoms are pain and/or neurological deficits. They can be intraneural or extraneural or develop between or within muscles. Synovial cysts that arise at a distance from a joint raise diagnostic challenges. We report three cases of synovial cysts of the proximal tibiofibular joint, including an intramuscular cyst responsible for paralysis of the anterolateral leg muscles. Tibiofibular synovial cysts are less common than popliteal cysts, and their pathophysiology is poorly understood. Pressure on the common peroneal nerve is the main complication and requires careful surgical excision of the cyst. Injection of a glucocorticoid into the cyst can be used as the first-line treatment in patients without common peroneal nerve symptoms.
Pagnoux
Christian
C
Department of internal medicine and rheumatology, Hôpital de la Croix Saint-Simon, Paris, France.
Lhotellier
Luc
L
Marek
Joëlle Janse
JJ
Ballard
Magali
M
Chazerain
Pascal
P
Ziza
Jean-Marc
JM
D005260:Female; D005360:Fibula; D006801:Humans; D007592:Joint Diseases / Q000209:etiology / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000209:etiology; D010543:Peroneal Nerve / Q000473:pathology; D013581:Synovial Cyst / Q000150:complications / Q000473:pathology*; D013977:Tibia