<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2183-1351</journal-id>
<journal-title><![CDATA[Acta Radiológica Portuguesa]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Radiol Port]]></abbrev-journal-title>
<issn>2183-1351</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Radiologia e Medicina Nuclear]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2183-13512027000200903</article-id>
<article-id pub-id-type="doi">10.25748/arp.43781</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Traumatic Posterolateral Corner Injury of the Knee in a Jiu-Jitsu Athlete]]></article-title>
<article-title xml:lang="pt"><![CDATA[Lesão Traumática do Canto Póstero-Lateral do Joelho em um Atleta de Jiu-Jitsu]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[Vitor Hugo de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Shimidu]]></surname>
<given-names><![CDATA[Henrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duarte]]></surname>
<given-names><![CDATA[Márcio Luís]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade de Ribeirão Preto - Campus Guarujá  ]]></institution>
<addr-line><![CDATA[Guarujá (SP) ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Samaritano  ]]></institution>
<addr-line><![CDATA[São Paulo (SP) ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Diagnósticos da América S.A. - DASA  ]]></institution>
<addr-line><![CDATA[São Paulo (SP) ]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2027</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2027</year>
</pub-date>
<volume>39</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S2183-13512027000200903&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S2183-13512027000200903&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S2183-13512027000200903&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Multiligamentous knee injuries involving the posterolateral corner (PLC) and the posterior cruciate ligament (PCL) are uncommon but clinically significant due to their association with marked instability and functional limitation. They usually result from combined varus and rotational mechanisms, as seen in martial arts. Diagnosis relies on clinical-imaging correlation, with magnetic resonance imaging (MRI) being crucial for identifying the affected structures, including partial tears and avulsion fractures such as the &#8220;arcuate sign.&#8221; Early recognition is essential to prevent chronic instability and secondary degenerative changes. Management depends on the severity and functional demands of the patient, with surgical reconstruction recommended in combined or complete injuries. This case demonstrates the characteristic MRI findings of PCL and PLC rupture with fibular styloid avulsion in a recreational jiu-jitsu practitioner, emphasizing the value of multiplanar MRI in diagnosis and treatment planning.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo As lesões multiligamentares do joelho que envolvem o canto póstero-lateral (CPL) e o ligamento cruzado posterior (LCP) são pouco frequentes, mas clinicamente relevantes pela associação com instabilidade significativa e limitação funcional. Geralmente resultam de mecanismos combinados de varo e rotação, como ocorre nas artes marciais. O diagnóstico baseia-se na correlação clínica e imagiológica, sendo a ressonância magnética (RM) fundamental para identificar as estruturas afetadas, incluindo lesões parciais e fraturas por avulsão, como o &#8220;arcuate sign&#8221;. O reconhecimento precoce é essencial para evitar instabilidade crónica e alterações degenerativas secundárias. O tratamento depende da gravidade e das exigências funcionais do doente, sendo a reconstrução cirúrgica recomendada nos casos combinados ou completos. O caso apresentado demonstra os achados típicos de rotura do LCP e do CPL com fratura da estiloide fibular num praticante recreativo de jiu-jitsu, salientando o papel da RM multiplanar no diagnóstico e planeamento terapêutico.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Canto póstero-lateral]]></kwd>
<kwd lng="pt"><![CDATA[Ligamento cruzado posterior]]></kwd>
<kwd lng="pt"><![CDATA[Lesões do joelho]]></kwd>
<kwd lng="pt"><![CDATA[Ressonância magnética.]]></kwd>
<kwd lng="en"><![CDATA[Posterolateral corner]]></kwd>
<kwd lng="en"><![CDATA[Posterior cruciate ligament]]></kwd>
<kwd lng="en"><![CDATA[Knee injuries]]></kwd>
<kwd lng="en"><![CDATA[Magnetic resonance Imaging.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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</back>
</article>
