Acute rotational trauma to the knee: poor agreement between clinical assessment and magnetic resonance imaging findings.

Research output: Contribution to journalArticle


To determine the incidence of anterior cruciate ligament (ACL) injuries in the general population; the pathology associated with a knee sprain verified by magnetic resonance imaging (MRI); and the agreement between clinical findings and MRI.Materials and methods: Inclusion criterion was an acute rotational trauma to the knee associated with effusion. One hundred and fifty-nine consecutive patients, mean age 27 years and 36% women, were included after clinical assessment at the orthopedic emergency unit. Patients were referred to an MRI examination (1.0 or 1.5 T) performed within a median of 8 days of the initial visit.Results: The annual incidence of MRI verified ACL injuries was 0.81/1000 inhabitants aged 10-64 years. Fifty-six percent (n=89) of those included had sustained an ACL injury of whom 38% had an associated medial meniscus tear. There was a poor agreement between initial clinical antero-posterior laxity and MRI verified presence of an ACL tear (kappa 0.281). Every second patellar dislocation was diagnosed as a ligament injury. Conclusions: Our findings indicate that the incidence of ACL injuries is higher than previously described. We also show that the first clinical examination after an acute knee trauma has a low diagnostic value. Further assessment with MRI improves the chances of a correct diagnosis of intraarticular pathology and is recommended in the early phase after a rotational knee trauma.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Sport and Fitness Sciences


  • knee joint, humans, adult, magnetic resonance imaging, prospective studies, clinical trial, anterior cruciate ligament, adolescent
Original languageEnglish
Pages (from-to)109-114
JournalScandinavian Journal of Medicine & Science in Sports
Issue number2
Publication statusPublished - 2007
Publication categoryResearch

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