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Results: Fifteen of the 18 asymptomatic footballers had no abnormality on MRI, whilst 3 reported one abnormality (dislocation), one (instability) two (tear of iliac crest), and one (four-level annular tear) abnormality on MRI. Overall these findings comprised "mild" abnormalities in 4 of the 18 footballers and "moderate" abnormalities in 5 of the 18 footballers. There was no significant difference in the prevalence of abnormalities between studies of the right side of the lumbar spine and the left side of the lumbar spine, or between MRI studies by radiologist one and radiologist two. The most common abnormality described was a single intervertebral disc herniation with associated mild degenerative changes, and the most common region of the lumbar spine demonstrating abnormalities was at L4/L5.
Conclusion: This study suggests that abnormal MRI findings in the lumbar spine of elite footballers, on retrospective review of MRI studies, are not common. Preceding literature has shown that persistent symptoms can follow pars damage in elite players (13% 3-year incidence of chronic/permanent back injury, and iliac crest avulsion tears can occur in elite male footballers (3.4% chronic psoas muscle strain, and 1.2% avulsion tears), so these findings may be subject to recall bias. To our knowledge, this is the first study to describe the MRI lumbar spine findings of asymptomatic elite male adolescent footballers. A rigorous study design protocol was adhered to using the STROBE checklist. Novel and emerging imaging techniques (e.g., MRI 3D VIBE) were employed to describe common injuries (e.g., pars injury) and assessing the prevalence of these would be an important step in improving our understanding of common injuries and how to prevent and treat them in the lumbar spine.
The results of this study provide the first description of the MRI lumbar spine findings of elite male adolescent footballers. A rigorous study design protocol was adhered to using the STROBE checklist. Novel and emerging imaging techniques (e.g. d2c66b5586