<?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>S2183-13512022000200031</article-id>
<article-id pub-id-type="doi">10.25748/arp.25682</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Ovarian Torsion Mimicking a Malignant Ovarian Tumour]]></article-title>
<article-title xml:lang="pt"><![CDATA[Torção do Ovário Simulando um Tumor Maligno do Ovário]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sousa]]></surname>
<given-names><![CDATA[Filipa Alves e]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cunha]]></surname>
<given-names><![CDATA[Teresa Margarida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro Hospitalar Universitário de Lisboa Central Department of Radiology ]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Português de Oncologia de Lisboa Francisco Gentil Department of Radiology ]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>08</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>08</month>
<year>2022</year>
</pub-date>
<volume>34</volume>
<numero>2</numero>
<fpage>31</fpage>
<lpage>34</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S2183-13512022000200031&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S2183-13512022000200031&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S2183-13512022000200031&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Ovarian torsion is a rare surgical emergency, and its diagnosis is often challenging due to the nonspecific or intermittent nature of symptoms. Radiological evaluation is almost always necessary to reach the diagnosis, and to exclude other more common causes of acute pelvic and lower abdominal pain. Although pelvic ultrasound is usually the first-line imaging study, ovarian torsion may be first detected on cross-sectional imaging (CT or MRI) due to the growing use of these techniques, especially the use of CT in the emergency department. There are some specific imaging findings, such us the whirlpool sign (of the twisted ovarian vascular pedicle) associated with an ipsilateral adnexal mass or ovarian enlargement. However, clinical presentation and imaging findings may both be unspecific, in which case, the correct diagnosis may only arise from a high level of clinical suspicion and comprehension of the pathophysiology that underlies the different chronological stages of ovarian torsion.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo A torção do ovário é uma emergência cirúrgica rara, geralmente de difícil diagnóstico atendendo à natureza inespecífica ou intermitente dos sintomas. A avaliação radiológica é quase sempre necessária para o seu diagnóstico e para exclusão de outras causas mais comuns de dor abdomino-pélvica aguda. Embora a ecografia pélvica seja geralmente o exame de primeira linha, a torção do ovário pode ser inicialmente detectada através da TC ou da RM, devido ao uso crescente destas técnicas, especialmente da TC em contexto de urgência. Existem alguns achados radiológicos específicos, tais como o whirlpool sign (resultante da torção do pedículo vascular do ovário) na presença de um tumor anexial ou de um aumento do ovário ipsilateral. No entanto, a apresentação clínica e os achados radiológicos podem ser ambos inespecíficos, e nesses casos, o diagnóstico correcto apenas pode ser sugerido através da correlação clínica e da compreensão da fisiopatologia subjacente aos diferentes estágios cronológicos da torção do ovário.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Torção do ovário]]></kwd>
<kwd lng="pt"><![CDATA[RM]]></kwd>
<kwd lng="pt"><![CDATA[TC.]]></kwd>
<kwd lng="en"><![CDATA[Ovarian torsion]]></kwd>
<kwd lng="en"><![CDATA[MRI]]></kwd>
<kwd lng="en"><![CDATA[CT.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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