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Case Report
Fountain morphology of an osteochondral defect in a paediatric patient: A case report
1 RCSI School of Medicine, 123 St. Stephen’s Green, Dublin, Ireland
2 Department of Orthopaedic Surgery, Children’s Health Ireland at Crumlin, Dublin, Ireland
3 Department of Radiology, Children’s Health Ireland at Temple Street, Dublin, Ireland
4 School of Medicine, University College Dublin, Dublin, Ireland
Address correspondence to:
Nadim Sayani
3 Cambridge Square, Dublin,
Ireland
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Article ID: 101523Z01NS2025
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Sayani N, Boughton OR, Pirie K, Hoare S, O’Toole P. Fountain morphology of an osteochondral defect in a paediatric patient: A case report. Int J Case Rep Images 2025;16(2):58–62.ABSTRACT
Introduction: This case report describes a 13-year-old male patient, with unusual magnetic resonance imaging findings of subchondral cysts associated with an osteochondral defect of the right knee.
Case Report: The patient presented with a six-week history of right knee pain, swelling and locking. Clinical examination revealed a loose body in the suprapatellar pouch, a small effusion, and a fixed flexion deformity. Imaging features revealed an unusual fountain-like morphology of the subchondral cysts, deep to the defect. The patient underwent surgical repair.
Conclusion: This radiographical finding may suggest an interplay between biomechanical stress and subchondral bone remodeling, warranting further investigation into the pathogenesis of such morphology.
Keywords: Fountain morphology, Orthopedics, Osteochondral defect, Pediatric, Spray morphology, Subchondral cyst
SUPPORTING INFORMATION
Author Contributions
Nadim Sayani - Substantial contributions to conception and design, Acquisition of data, Analysis of data, Interpretation of data, Drafting the article, Final approval of the version to be published
Oliver Richard Boughton - Substantial contributions to conception and design, Acquisition of data, Analysis of data, Interpretation of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Katherine Pirie - Substantial contributions to conception and design, Acquisition of data, Analysis of data, Interpretation of data, Drafting the article, Final approval of the version to be published
Siobhan Hoare - Analysis of data, Interpretation of data, Revising it critically for important intellectual content, Final approval of the version to be published
Patrick O’Toole - Substantial contributions to conception and design, Acquisition of data, Analysis of data, Interpretation of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Guarantor of SubmissionThe corresponding author is the guarantor of submission.
Source of SupportNone
Consent StatementWritten informed consent was obtained from the patient for publication of this article.
Data AvailabilityAll relevant data are within the paper and its Supporting Information files.
Conflict of InterestAuthors declare no conflict of interest.
Copyright© 2025 Nadim Sayani et al. This article is distributed under the terms of Creative Commons Attribution License which permits unrestricted use, distribution and reproduction in any medium provided the original author(s) and original publisher are properly credited. Please see the copyright policy on the journal website for more information.
