Abstract
Purpose
Pathologic abnormality of the peroneal tendons are thought to be an under-appreciated source of vague ankle and hindfoot pain in paediatric patients, partly because they can be difficult to diagnose and differentiate from lateral ankle ligament injuries. While magnetic resonance imaging (MRI) is the primary imaging modality used to detect peroneal tendon pathology, previous studies in adults have found that positive MRIs demonstrate a positive predictive value (PPV) of associated clinical findings around 48%. There are no similar known published studies in the paediatric population. Our objective was to determine the positive predictive value of peroneal tendon pathology as diagnosed by MRI as related to positive clinical exam findings in the paediatric and adolescent population.
Methods
This IRB approved retrospective study was conducted at a tertiary children’s hospital. Inclusion criteria included patients under 18 years from our tertiary care institution with (a) ankle MRI findings indicating pathology of the peroneus brevis/longus tendons confirmed by a board certified paediatric musculoskeletal radiologist and (b) formal review of the clinical examination by a fellowship trained paediatric orthopaedic surgeon. Patients with congenital deformities or previous surgical intervention of the lateral ankle were excluded.
Results
Forty-seven patients (with 48 MRIs) met inclusion criteria over a ten year period. The majority of the positive MRI scans (70%) demonstrated a peroneus brevis split tear. Of the patients with positive findings on MRI, 17 patients had an associated positive clinical exam. The positive predictive value of MRI for peroneal tendon tears with positive clinical findings was 35.41% (95% confidence interval = 31.1% to 41.6%). There were 31 patients with MRI positive findings with a negative clinical exam.
Conclusion
Despite having a negative clinical exam, a high percentage of patients had positive MRI findings suggestive of peroneal tendon pathology which confirms findings of adult populations demonstrating a high rate of incidental finding of peroneal tendon pathology on MRI in paediatric patients.
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Acknowledgements
The authors would like to acknowledge Stacey Isidro MD for their assistance with the chart review.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by B.C. The first draft of the manuscript was written by N.G. and B.C., and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This is a retrospective study authorized by the Institutional Review Board for Baylor College of Medicine and Affiliated Hospitals under reference H-45616.
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Chhabra, B., Gattu, N. & Kushare, I. MRI findings of peroneal tendon tears do not necessarily correlate to clinical findings in paediatric and adolescent patients. International Orthopaedics (SICOT) 48, 1561–1567 (2024). https://doi.org/10.1007/s00264-024-06110-x
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DOI: https://doi.org/10.1007/s00264-024-06110-x