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Journal of Korean Neurosurgical Society > Volume 50(1); 2011 > Article
Journal of Korean Neurosurgical Society 2011;50(1): 54-56.
doi: https://doi.org/10.3340/jkns.2011.50.1.54
Foraminal Synovial Cyst Associated with Ankylosing Spondylitis.
Heyun Sung Kim, Chang Il Ju, Seok Won Kim
1Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Korea.
2Department of Neurosurgery, College of Medicine, Chosun University, Gwangju, Korea. ns64902@hanmail.net
ABSTRACT
Ankylosing spondylitis (AS) is frequently associated with inflammatory lesions of the spine and continuous fatigue stress fractures; however, an association with an intraspinal synovial cyst has not been previously reported. A 55-year-old man with a five year history of AS who presented with back pain and a right radiculopathy was admitted to the hospital. Five years previously, he underwent a percutaneous vertebroplasty for an osteoporotic L1 compression fracture, and was diagnosed with AS at that time. Plain radiographs showed aggravated kyphosis and a stress fracture through the ossified posterior element, below the prior vertebroplasty. Magnetic resonance images revealed a right foraminal cystic lesion at the L2-L3 level with effacement of the nerve root. A 1.6 cm cystic lesion that appeared to arise from the L2-L3 facet joint without direct communication was excised from the L2-L3 foramen. Pathological examination confirmed synovial cyst. The patient's symptoms resolved immediately after surgery except for a mild dysesthesia of the right leg. We report herein a rare case of foraminal synovial cyst associated with AS accompanying posterior element fracture with a review of literature.
Key Words: Synovial cyst; Ankylosing spondylitis
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