<?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>2184-0628</journal-id>
<journal-title><![CDATA[Gazeta Médica]]></journal-title>
<abbrev-journal-title><![CDATA[Gaz Med]]></abbrev-journal-title>
<issn>2184-0628</issn>
<publisher>
<publisher-name><![CDATA[Círculo Médico]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2184-06282020000300290</article-id>
<article-id pub-id-type="doi">10.29315/gm.v7i3.321</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[CA 19.9 na Coledocolitíase: Caso Clínico]]></article-title>
<article-title xml:lang="en"><![CDATA[CA 19.9 in Choledocholithiasis: Case Report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Correia]]></surname>
<given-names><![CDATA[Paulo Costa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Maria Luís]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vieira]]></surname>
<given-names><![CDATA[Francisco O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Cirurgia Geral da ULS - GUARDA  ]]></institution>
<addr-line><![CDATA[Guarda ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Faculdade de Ciências da Saúde da Universidade da Beira Interior (UBI)  ]]></institution>
<addr-line><![CDATA[Covilhã ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Sousa Martins - ULS Guarda Serviço de Cirurgia Geral ]]></institution>
<addr-line><![CDATA[Guarda ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>7</volume>
<numero>3</numero>
<fpage>290</fpage>
<lpage>293</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S2184-06282020000300290&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S2184-06282020000300290&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S2184-06282020000300290&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Com base num paciente com elevação acentuada dos níveis de CA 19.9 sérico, portador de coledocolitíase, são feitas algumas considerações sobre a utilidade dos marcadores tumorais na prática clínica. Um nível elevado deste antigénio nem sempre corresponde a patologia maligna, não sendo específico da mesma, retirando importância diagnóstica ao mesmo, muitas vezes, confundindo situações. Estudos retrospetivos demonstram que o uso indevido dos marcadores tumorais encarece os sistemas de saúde, deturpam e atrasam diagnósticos. No entanto, os autores reforçam o seu papel no acompanhamento de pacientes oncológicos, com diagnóstico comprovado de neoplasias, podendo ser benéficos para decisões terapêuticas futuras e vigilância clínica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Based on a patient with a marked increase in serum CA 19.9, with choledocholithiasis, some considerations are made about the usefulness of tumor markers in clinical practice. A high level of this antigen does not always correspond to malignant pathology, it is not specific for it, withdrawing its diagnostic importance, often confusing situations. Retrospective studies show that the improper use of tumor markers makes health systems more expensive, it may confound and delay diagnosis. However, the authors reinforce their role in monitoring cancer patients, with a proven diagnosis of neoplasms, which may be beneficial for future therapeutic decisions and clinical surveillance.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Antigénio CA-19-9]]></kwd>
<kwd lng="pt"><![CDATA[Biomarcadores Tumorais]]></kwd>
<kwd lng="pt"><![CDATA[Coledocolitíase/diagnóstico]]></kwd>
<kwd lng="en"><![CDATA[Biomarkers, Tumor]]></kwd>
<kwd lng="en"><![CDATA[CA-19-9 Antigen]]></kwd>
<kwd lng="en"><![CDATA[Choledocholithiasis/diagnosis]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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