alexa Characteristics of Clinical and Imaging Findings in Adolescent Lumbar Spondylolysis Associated with Sports Activities
ISSN: 2165-7939

Journal of Spine
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Research Article

Characteristics of Clinical and Imaging Findings in Adolescent Lumbar Spondylolysis Associated with Sports Activities

Akira Hirano1, Tsuneo Takebayashi1*, Mitsunori Yoshimoto1, Kazunori Ida1, Tosihiko Yamashita1 and Kazuhiko Nakano2
1Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Japan
2Department of Orthopaedic Surgery, Nishioka Daiichi Hospital, Japan
Corresponding Author : Tsuneo Takebayashi
Department of Orthopedic Surgery
School of Medicine
Sapporo Medical University
Hokkaido 060-8543, Japan
Tel: 81-11-611-2111
Fax: 81-11-641-6026
E-mail: [email protected]
Received July 08, 2012; Accepted September 14, 2012; Published September 19, 2012
Citation: Hirano A, Takebayashi T, Yoshimoto M, Ida K, Yamashita T, et al. (2012) Characteristics of Clinical and Imaging Findings in Adolescent Lumbar Spondylolysis Associated with Sports Activities. J Spine 1:124. doi:10.4172/2165-7939.1000124
Copyright: © 2012 Hirano A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Abstract

Background: Adolescent lumbar spondylolysis is considered to be a fatigue fracture caused by repeated mechanical stress and sports activities are often thought to be the cause. The incidence of lumbar spondylolysis has been reported to be generally 3%-6%, and 4%-10% among patients complaining LBP. In athletes, the incidence of lumbar spondylolysis during adolescence has ranged from approximately 15% to 50%. The purpose of this study was to prospectively investigate to determine the imaging and pain characteristics of spondylolysis on lumbar extension among adolescent patients with Low Back Pain (LBP) who played sports.

Methods: 100 patients (a mean age of 14.8 years) were selected as the subjects and were investigated sports activities, duration of LBP, and pain with lumbar repetitive extension. Plain X-ray, CT, and high-intensity signal changes in the pedicle on T2 MRI were examined for diagnostic indications of lumbar spondylolysis.

Results: Spondylolysis was confirmed by plain X-ray in 34 patients, 8 were confirmed on CT. Spondylolysis was eventually identified in 42 of the 100 patients (42.0%). High-intensity signal changes in the pedicle on T2 MRI were recognized in 29 cases. Pain with lumbar extension occurred in 69 of the 100 patients (69.0%) including 34 of the 42 patients with spondylolysis (81.0%) and 35 of the 58 patients without spondylolysis (60.3%). Therefore, the sensitivity of the lumbar extension was 81.0% (34/42), and its specificity was 39.7% (23/58).

Conclusion: Among adolescent athletes, the incidence of lumbar spondylolysis was 42.0%, and of the 69 patients with pain with lumbar extension, 34 (81.0%) were confirmed to have spondylolysis. Pain with lumbar extension appears to be a good screening indicator for adolescent lumbar spondylolysis.

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