Clinical Focus ›› 2022, Vol. 37 ›› Issue (10): 927-930.doi: 10.3969/j.issn.1004-583X.2022.10.008

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Magnetic resonance imaging characteristics of Andersson lesions associated with ankylosing spondylitis

Gao Ying1, Han Zhongli2a, Wang Hongyan3, Li Xiaofu2b()   

  1. 1. Department of Radiology, Harbin Institute of Technology Hospital, Harbin 150040, China
    2. Department of Radiology; b.Department of Magnetic Resonance Imaging, the 2nd Affiliated Hospital of Harbin Medical University, Harbin 150086, China
    3. Department of Magnetic Resonance Imaging, Harbin Orthopaedics and Traumatology Hospital, Harbin 150080, China
  • Received:2022-06-24 Online:2022-10-20 Published:2022-11-26
  • Contact: Li Xiaofu E-mail:davin2004@163.com

Abstract:

Objective To investigate the magnetic resonance imaging (MRI) characteristics of Anderson lesions (AL) associated with ankylosing spondylitis (AS). Methods A retrospective analysis was made on 78 AS patients who underwent spinal MRI examination in the Department of Radiology, Harbin Institute of Technology Hospital from July 2018 to November 2021, and in the Department of MRI, the 2nd Affiliated Hospital of Harbin Medical University from January 2018 to November 2021.The clinical data were compared in two groups which comprised 23 (inflammatory group) and 10 (traumatic group) patients. Results Among 78 AS patients, 33 had AL, with a detection rate of 42.3%. The modified Stoke ankylosing spondylitis spine score (mSASSS) in traumatic group was higher than that in inflammatory group (P<0.05). The difference of involved discovertebral units (DVUs) between the two groups was statistically significant (P<0.05), and the MRI characteristics were different. Correlation analysis showed that erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), human leucocyte antigen-B27 (HLA-B27), Bath ankylosing spondylitis disease activity index (BASDAI), mSASSS were not correlated with the number of involved DVUs(P>0.05). Conclusion AL is not rare in AS patients. Inflammatory AL and traumatic AL have different MRI manifestations. MRI has important value in detecting and evaluating AL.

Key words: ankylosing spondylitis, Andersson lesions, magnetic resonance imaging

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