<?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>2341-4545</journal-id>
<journal-title><![CDATA[GE-Portuguese Journal of Gastroenterology]]></journal-title>
<abbrev-journal-title><![CDATA[GE Port J Gastroenterol]]></abbrev-journal-title>
<issn>2341-4545</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Gastrenterologia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2341-45452021000500336</article-id>
<article-id pub-id-type="doi">10.1159/000512089</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Neuroendocrine Tumors of the Gastrointestinal Tract: A Focused Review and Practical Approach for Gastroenterologists]]></article-title>
<article-title xml:lang="pt"><![CDATA[Tumores Neuroendócrinos do Trato Gastrointestinal: Revisão e Abordagem Prática Para Gastrenterologistas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carvão]]></surname>
<given-names><![CDATA[Joana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dinis-Ribeiro]]></surname>
<given-names><![CDATA[Mário]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pimentel-Nunes]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A4"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Libânio]]></surname>
<given-names><![CDATA[Diogo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Central do Funchal Gastroenterology Department ]]></institution>
<addr-line><![CDATA[Funchal ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Português de Oncologia do Porto  ]]></institution>
<addr-line><![CDATA[Porto ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,University of Porto Faculty of Medicine MEDCIDS - Department of Community Medicine, Health Information and Decision]]></institution>
<addr-line><![CDATA[Porto ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,University of Porto Faculty of Medicine Surgery and Physiology Department]]></institution>
<addr-line><![CDATA[Porto ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>10</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>10</month>
<year>2021</year>
</pub-date>
<volume>28</volume>
<numero>5</numero>
<fpage>336</fpage>
<lpage>348</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S2341-45452021000500336&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S2341-45452021000500336&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S2341-45452021000500336&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Neuroendocrine tumors (NETs) are rare tumors derived from the neuroendocrine cell system, and more commonly found in the gastrointestinal (GI) tract. Over the last decades, the incidence of GI-NETs has been steadily increasing, partly due to the expanding indications for endoscopy. Most patients with NETs are asymptomatic, and their NETs are noticed during screening examinations; thus, endoscopists are on the frontline of the diagnosis of GI-NETs. Since GI-NETs are less frequent than other malignancies, the natural history, diagnosis, and management of these tumors may not be fully understood. In this review, we aim to update the endoscopist on key clinical features and management of patients with gastric, duodenal, and rectal NETs.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo: Os tumores neuroendócrinos (TNE) são tumores raros derivados do sistema neuroendócrino e mais frequentemente encontrados no trato gastrointestinal. Nas últimas décadas, a incidência de TNEs gastrointestinais tem vindo a aumentar de forma consistente, em parte devido às crescentes indicações da endoscopia. De facto, a maioria dos doentes com TNEs são assintomáticos e a lesão é identificada durante procedimentos de rastreio. Os endoscopistas estão na linha de frente do diagnóstico destes tumores. Como os TNEs são menos frequentemente encontrados em comparação com outras neoplasias, a história natural, o diagnóstico e a abordagem terapêutica destes tumores podem não ser totalmente compreendidos. Nesta revisão, os autores têm como objetivo atualizar o endoscopista sobre as principais características clínicas e abordagem endoscópica de doentes com TNE gástricos, duodenais e rectais.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Neuroendocrine tumors]]></kwd>
<kwd lng="en"><![CDATA[Gastrointestinal tract]]></kwd>
<kwd lng="en"><![CDATA[Endoscopy]]></kwd>
<kwd lng="pt"><![CDATA[Tumores neuroendócrinos]]></kwd>
<kwd lng="pt"><![CDATA[Trato gastrointestinal]]></kwd>
<kwd lng="pt"><![CDATA[Endoscopia]]></kwd>
</kwd-group>
</article-meta>
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<year>2020</year>
<volume>52</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>68-72</page-range></nlm-citation>
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</article>
