caa a22 4500 605459401 CHVBK 20210128100233.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00167-014-3022-5 doi (NATIONALLICENCE)springer-10.1007/s00167-014-3022-5 The lateral femoral notch sign following ACL injury: frequency, morphology and relation to meniscal injury and sports activity [Elektronische Daten] [Elmar Herbst, Christian Hoser, Katja Tecklenburg, Marcel Filipovic, Christian Dallapozza, Mirco Herbort, Christian Fink] Purpose: The purpose of this study was to determine the incidence of the "lateral femoral notch sign” in acute anterior cruciate ligament (ACL) tears and its correlation with lateral meniscal tears. Methods: Lateral plain radiographs and sagittal magnetic resonance images (each performed within 1month following injury) of 500 patients with acute and arthroscopically confirmed ACL tears were retrospectively evaluated for depth, length and position of the "lateral femoral notch sign”. The accompanying bone bruise was measured, as well. The correlation of the lateral femoral notch sign with high-risk and low-risk pivoting activities as well as with a lateral meniscus tear was evaluated. Results: A total of 26.4% of the patients had a lateral femoral notch sign deeper than 2.0mm with a mean depth of 2.8±0.8mm SD. All lateral femoral notches were situated near or slightly posterior to Blumensaat's line. ACL injuries sustained during high-risk pivoting sports were more prone to a lateral femoral notch sign than ACL injuries in low-risk pivoting sports (r=0.107 vs r=−0.107). Of all patients with a lateral femoral notch sign, 40.2% also had lateral meniscus tears. The correlation between the presence of the lateral femoral notch sign and lateral meniscus tears was statistically significant (p=0.004). Conclusion: In more than one-quarter of patients, plain radiographs may help to establish the diagnosis of an ACL tear. Further, a lateral femoral notch sign greater than 2.0mm also correlates with lateral meniscus tears. Hence, the lateral femoral notch sign is a useful diagnostic tool in daily clinical practice. Level of evidence: IV. Springer-Verlag Berlin Heidelberg, 2014 Lateral femoral notch sign nationallicence Terminal sulcus nationallicence Condylopatellar sulcus nationallicence Lateral meniscus nationallicence Anterior cruciate ligament nationallicence Secondary signs nationallicence Herbst Elmar Department of Trauma Surgery and Sports Medicine, Medical University Innsbruck (MUI), Anichstrasse 35, 6020, Innsbruck, Austria aut Hoser Christian Sportsclinicaustria, Olympiastrasse 39, 6020, Innsbruck, Austria aut Tecklenburg Katja Medalp Sportklinik Imst, Medalp Platz 1, 6460, Imst, Austria aut Filipovic Marcel Abteilung für Unfallchirurgie und Orthopädische Chirurgie, Zentrum für Hand- und Wirbelsäulenchirurgie, Klinikum Traunstein, Cuno-Niggl-Straße 3, 83278, Traunstein, Germany aut Dallapozza Christian Department of Trauma Surgery and Sports Medicine, Medical University Innsbruck (MUI), Anichstrasse 35, 6020, Innsbruck, Austria aut Herbort Mirco Clinic for Trauma-, Hand and Reconstructive Surgery, University of Muenster, Waldeyerstrasse 1, 48149, Muenster, Germany aut Fink Christian Sportsclinicaustria, Olympiastrasse 39, 6020, Innsbruck, Austria aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/8(2015-08-01), 2250-2258 0942-2056 23:8<2250 2015 23 167 https://doi.org/10.1007/s00167-014-3022-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-3022-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Herbst Elmar Department of Trauma Surgery and Sports Medicine, Medical University Innsbruck (MUI), Anichstrasse 35, 6020, Innsbruck, Austria aut NATIONALLICENCE 700 1- Hoser Christian Sportsclinicaustria, Olympiastrasse 39, 6020, Innsbruck, Austria aut NATIONALLICENCE 700 1- Tecklenburg Katja Medalp Sportklinik Imst, Medalp Platz 1, 6460, Imst, Austria aut NATIONALLICENCE 700 1- Filipovic Marcel Abteilung für Unfallchirurgie und Orthopädische Chirurgie, Zentrum für Hand- und Wirbelsäulenchirurgie, Klinikum Traunstein, Cuno-Niggl-Straße 3, 83278, Traunstein, Germany aut NATIONALLICENCE 700 1- Dallapozza Christian Department of Trauma Surgery and Sports Medicine, Medical University Innsbruck (MUI), Anichstrasse 35, 6020, Innsbruck, Austria aut NATIONALLICENCE 700 1- Herbort Mirco Clinic for Trauma-, Hand and Reconstructive Surgery, University of Muenster, Waldeyerstrasse 1, 48149, Muenster, Germany aut NATIONALLICENCE 700 1- Fink Christian Sportsclinicaustria, Olympiastrasse 39, 6020, Innsbruck, Austria aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/8(2015-08-01), 2250-2258 0942-2056 23:8<2250 2015 23 167