High prevalence of patellar dislocation and trochlear dysplasia in a geographically and genetically isolated society: an observational national cohort study from the Faroese Knee Cohort
Background and purpose: We aimed to calculate the prevalence of patellar dislocation (PD) and trochlear dysplasia (TD) in a national cohort aged 15–19 years in the Faroe Island. Patients and methods: All inhabitants in the Faroe Islands aged 15–19 years were invited to answer an online survey, incl...
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| Format: | Article |
| Language: | English |
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Medical Journals Sweden
2024-01-01
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| Series: | Acta Orthopaedica |
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| Online Access: | https://actaorthop.org/actao/article/view/35229 |
| _version_ | 1797351459773218816 |
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| author | Niclas H Eysturoy Hans-Christen Husum Elinborg S Mortensen Lars Blønd Per Hölmich Kristoffer W Barfod |
| author_facet | Niclas H Eysturoy Hans-Christen Husum Elinborg S Mortensen Lars Blønd Per Hölmich Kristoffer W Barfod |
| author_sort | Niclas H Eysturoy |
| collection | DOAJ |
| description |
Background and purpose: We aimed to calculate the prevalence of patellar dislocation (PD) and trochlear dysplasia (TD) in a national cohort aged 15–19 years in the Faroe Island.
Patients and methods: All inhabitants in the Faroe Islands aged 15–19 years were invited to answer an online survey, including demographics and questions regarding prior PD. Participants with prior PD were invited for radiographs and MRI of both knees to be taken. Trochlear dysplasia was defined as one of the following: Dejour type A–D on radiographs, lateral trochlear inclination angle (LTI) < 11°, or trochlear depth < 3 mm on MRI.
Results: 3,749 individuals were contacted, 41 were excluded, and 1,638 (44%) completed the survey. 146 reported a prior PD (the PD cohort) and 100 accepted to participate and have radiographs and MRI taken of both knees (the clinical PD cohort), 76 of whom were diagnosed with TD. The national prevalence of PD was 8.9%. The national prevalence of symptomatic TD was 6.8%. The prevalence of TD in the clinical PD cohort was 76%. TD was bilateral in 78% of TD patients, but only 27% of patients with bilateral TD had PD in both knees.
Conclusion: The prevalence of PD in the Faroe Islands is found to be very high. The national prevalence of TD and the prevalence of TD in participants with prior PD is high, indicating a potential genetic influence.
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| first_indexed | 2024-03-08T12:59:45Z |
| format | Article |
| id | doaj.art-d9eb029e089d4266929712df0d377490 |
| institution | Directory Open Access Journal |
| issn | 1745-3674 1745-3682 |
| language | English |
| last_indexed | 2024-03-08T12:59:45Z |
| publishDate | 2024-01-01 |
| publisher | Medical Journals Sweden |
| record_format | Article |
| series | Acta Orthopaedica |
| spelling | doaj.art-d9eb029e089d4266929712df0d3774902024-01-19T11:11:15ZengMedical Journals SwedenActa Orthopaedica1745-36741745-36822024-01-019510.2340/17453674.2024.35229High prevalence of patellar dislocation and trochlear dysplasia in a geographically and genetically isolated society: an observational national cohort study from the Faroese Knee CohortNiclas H Eysturoy0Hans-Christen Husum1Elinborg S Mortensen2Lars Blønd3Per Hölmich4Kristoffer W Barfod5Department of Orthopedic Surgery, National Hospital of the Faroe Islands, Torshavn, the Faroe IslandsInterdisciplinary Orthopedics, Aalborg University HospitalDepartment of Orthopedic Surgery, National Hospital of the Faroe Islands, Torshavn, the Faroe IslandsZealand University Hospital, Køge and Aleris Hospital, Copenhagen, DenmarkSports Orthopedic Research Center – Copenhagen (SORC-C), Department of Orthopedic Surgery, Copenhagen University Hospital Amager-Hvidovre, CopenhagenSports Orthopedic Research Center – Copenhagen (SORC-C), Department of Orthopedic Surgery, Copenhagen University Hospital Amager-Hvidovre, Copenhagen Background and purpose: We aimed to calculate the prevalence of patellar dislocation (PD) and trochlear dysplasia (TD) in a national cohort aged 15–19 years in the Faroe Island. Patients and methods: All inhabitants in the Faroe Islands aged 15–19 years were invited to answer an online survey, including demographics and questions regarding prior PD. Participants with prior PD were invited for radiographs and MRI of both knees to be taken. Trochlear dysplasia was defined as one of the following: Dejour type A–D on radiographs, lateral trochlear inclination angle (LTI) < 11°, or trochlear depth < 3 mm on MRI. Results: 3,749 individuals were contacted, 41 were excluded, and 1,638 (44%) completed the survey. 146 reported a prior PD (the PD cohort) and 100 accepted to participate and have radiographs and MRI taken of both knees (the clinical PD cohort), 76 of whom were diagnosed with TD. The national prevalence of PD was 8.9%. The national prevalence of symptomatic TD was 6.8%. The prevalence of TD in the clinical PD cohort was 76%. TD was bilateral in 78% of TD patients, but only 27% of patients with bilateral TD had PD in both knees. Conclusion: The prevalence of PD in the Faroe Islands is found to be very high. The national prevalence of TD and the prevalence of TD in participants with prior PD is high, indicating a potential genetic influence. https://actaorthop.org/actao/article/view/35229Dejour classificationfamilial association of patellar dislocationFemoral trochlear dysplasiaKneePatellar dislocation |
| spellingShingle | Niclas H Eysturoy Hans-Christen Husum Elinborg S Mortensen Lars Blønd Per Hölmich Kristoffer W Barfod High prevalence of patellar dislocation and trochlear dysplasia in a geographically and genetically isolated society: an observational national cohort study from the Faroese Knee Cohort Acta Orthopaedica Dejour classification familial association of patellar dislocation Femoral trochlear dysplasia Knee Patellar dislocation |
| title | High prevalence of patellar dislocation and trochlear dysplasia in a geographically and genetically isolated society: an observational national cohort study from the Faroese Knee Cohort |
| title_full | High prevalence of patellar dislocation and trochlear dysplasia in a geographically and genetically isolated society: an observational national cohort study from the Faroese Knee Cohort |
| title_fullStr | High prevalence of patellar dislocation and trochlear dysplasia in a geographically and genetically isolated society: an observational national cohort study from the Faroese Knee Cohort |
| title_full_unstemmed | High prevalence of patellar dislocation and trochlear dysplasia in a geographically and genetically isolated society: an observational national cohort study from the Faroese Knee Cohort |
| title_short | High prevalence of patellar dislocation and trochlear dysplasia in a geographically and genetically isolated society: an observational national cohort study from the Faroese Knee Cohort |
| title_sort | high prevalence of patellar dislocation and trochlear dysplasia in a geographically and genetically isolated society an observational national cohort study from the faroese knee cohort |
| topic | Dejour classification familial association of patellar dislocation Femoral trochlear dysplasia Knee Patellar dislocation |
| url | https://actaorthop.org/actao/article/view/35229 |
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