The lateral patellar retinaculum is thicker in paediatric and adolescent patients with patellofemoral instability: An MRI analysis
Abstract Purpose The purpose of this study was to examine the thickness of the lateral patellar retinaculum (LPR) and patellar tilt in paediatric and adolescent patients who undergo a medial patellofemoral ligament (MPFL) reconstruction. The authors hypothesise that patients undergoing MPFL reconstr...
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2025-04-01
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| Series: | Journal of Experimental Orthopaedics |
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| Online Access: | https://doi.org/10.1002/jeo2.70202 |
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| author | Danielle E. Chipman Emilie Lijesen Peter M. Cirrincione Danielle S. Gorelick Shae K. Simpson Douglas N. Mintz Daniel W. Green |
| author_facet | Danielle E. Chipman Emilie Lijesen Peter M. Cirrincione Danielle S. Gorelick Shae K. Simpson Douglas N. Mintz Daniel W. Green |
| author_sort | Danielle E. Chipman |
| collection | DOAJ |
| description | Abstract Purpose The purpose of this study was to examine the thickness of the lateral patellar retinaculum (LPR) and patellar tilt in paediatric and adolescent patients who undergo a medial patellofemoral ligament (MPFL) reconstruction. The authors hypothesise that patients undergoing MPFL reconstruction will have a thicker LPR and increased patellar tilt when compared to a comparison cohort. Methods Preoperative magnetic resonance imaging (MRI) of patients ≤ 18 years old who underwent an MPFL reconstruction was retrospectively reviewed. Patients were included if they had a proton density preoperative axial MRI performed internally at our institution. Included patients were matched to a comparison cohort. LPR thickness and patellar tilt were measured on MRI. LPR thickness and patellar tilt were compared between the MPFL cohort and the comparison cohort. Results A total of 363 patients were identified. 145 participants were successfully matched to the comparison cohort. The mean age in the MPFL cohort was 14.4 ± 2.0 years and 68% were female. The LPR thickness in the MPFL cohort was significantly greater than the LPR thickness in the comparison cohort (p < 0.001). The patellar tilt was significantly greater in the MPFL cohort compared to the control cohort (p < 0.001). There was no statistical difference in patients undergoing MPFL reconstruction and the occurrence of a lateral release/lengthening procedure. Conclusion The LPR was significantly thicker on preoperative MRI in patients undergoing MPFL reconstruction compared to a comparison cohort, indicating that increased LPR thickness is a potential marker of patellofemoral instability on imaging. Level of Evidence Level III. |
| format | Article |
| id | doaj-art-d68c8f46415a4547a89046c69741ed4c |
| institution | Kabale University |
| issn | 2197-1153 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Experimental Orthopaedics |
| spelling | doaj-art-d68c8f46415a4547a89046c69741ed4c2025-08-20T04:03:13ZengWileyJournal of Experimental Orthopaedics2197-11532025-04-01122n/an/a10.1002/jeo2.70202The lateral patellar retinaculum is thicker in paediatric and adolescent patients with patellofemoral instability: An MRI analysisDanielle E. Chipman0Emilie Lijesen1Peter M. Cirrincione2Danielle S. Gorelick3Shae K. Simpson4Douglas N. Mintz5Daniel W. Green6Department of Paediatric Orthopedics Hospital for Special Surgery New York New York USADepartment of Paediatric Orthopedics Hospital for Special Surgery New York New York USADepartment of Paediatric Orthopedics Hospital for Special Surgery New York New York USADepartment of Paediatric Orthopedics Hospital for Special Surgery New York New York USADepartment of Paediatric Orthopedics Hospital for Special Surgery New York New York USADepartment of Radiology Hospital for Special Surgery New York New York USADepartment of Paediatric Orthopedics Hospital for Special Surgery New York New York USAAbstract Purpose The purpose of this study was to examine the thickness of the lateral patellar retinaculum (LPR) and patellar tilt in paediatric and adolescent patients who undergo a medial patellofemoral ligament (MPFL) reconstruction. The authors hypothesise that patients undergoing MPFL reconstruction will have a thicker LPR and increased patellar tilt when compared to a comparison cohort. Methods Preoperative magnetic resonance imaging (MRI) of patients ≤ 18 years old who underwent an MPFL reconstruction was retrospectively reviewed. Patients were included if they had a proton density preoperative axial MRI performed internally at our institution. Included patients were matched to a comparison cohort. LPR thickness and patellar tilt were measured on MRI. LPR thickness and patellar tilt were compared between the MPFL cohort and the comparison cohort. Results A total of 363 patients were identified. 145 participants were successfully matched to the comparison cohort. The mean age in the MPFL cohort was 14.4 ± 2.0 years and 68% were female. The LPR thickness in the MPFL cohort was significantly greater than the LPR thickness in the comparison cohort (p < 0.001). The patellar tilt was significantly greater in the MPFL cohort compared to the control cohort (p < 0.001). There was no statistical difference in patients undergoing MPFL reconstruction and the occurrence of a lateral release/lengthening procedure. Conclusion The LPR was significantly thicker on preoperative MRI in patients undergoing MPFL reconstruction compared to a comparison cohort, indicating that increased LPR thickness is a potential marker of patellofemoral instability on imaging. Level of Evidence Level III.https://doi.org/10.1002/jeo2.70202lateral patellar retinaculummedial patellofemoral ligament reconstructionpatellar instabilitypatellar tiltpaediatrics |
| spellingShingle | Danielle E. Chipman Emilie Lijesen Peter M. Cirrincione Danielle S. Gorelick Shae K. Simpson Douglas N. Mintz Daniel W. Green The lateral patellar retinaculum is thicker in paediatric and adolescent patients with patellofemoral instability: An MRI analysis Journal of Experimental Orthopaedics lateral patellar retinaculum medial patellofemoral ligament reconstruction patellar instability patellar tilt paediatrics |
| title | The lateral patellar retinaculum is thicker in paediatric and adolescent patients with patellofemoral instability: An MRI analysis |
| title_full | The lateral patellar retinaculum is thicker in paediatric and adolescent patients with patellofemoral instability: An MRI analysis |
| title_fullStr | The lateral patellar retinaculum is thicker in paediatric and adolescent patients with patellofemoral instability: An MRI analysis |
| title_full_unstemmed | The lateral patellar retinaculum is thicker in paediatric and adolescent patients with patellofemoral instability: An MRI analysis |
| title_short | The lateral patellar retinaculum is thicker in paediatric and adolescent patients with patellofemoral instability: An MRI analysis |
| title_sort | lateral patellar retinaculum is thicker in paediatric and adolescent patients with patellofemoral instability an mri analysis |
| topic | lateral patellar retinaculum medial patellofemoral ligament reconstruction patellar instability patellar tilt paediatrics |
| url | https://doi.org/10.1002/jeo2.70202 |
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