<?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>S2341-45452023000200025</article-id>
<article-id pub-id-type="doi">10.1159/000525964</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Cap-Assisted Endoscopic Mucosal Resection for Rectal Neuroendocrine Tumors: An Effective Option]]></article-title>
<article-title xml:lang="pt"><![CDATA[Mucosectomia assistida por cap para tumores neuroendócrinos do reto: uma opção efetiva]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[João]]></surname>
<given-names><![CDATA[Mafalda]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[Susana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Areia]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Elvas]]></surname>
<given-names><![CDATA[Luís]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Brito]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saraiva]]></surname>
<given-names><![CDATA[Sandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martins]]></surname>
<given-names><![CDATA[Raquel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cadime]]></surname>
<given-names><![CDATA[Ana Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Portuguese Oncology Institute of Coimbra Gastroenterology Department ]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Portuguese Oncology Institute of Coimbra Endocrinology Department and Head of the Multidisciplinary Neuroendocrine Tumors Group ]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<volume>30</volume>
<numero>2</numero>
<fpage>25</fpage>
<lpage>32</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S2341-45452023000200025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S2341-45452023000200025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S2341-45452023000200025&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  The incidence of rectal neuroendocrine tumors (r-NETs) is increasing, and most small r-NETs can be treated endoscopically. The optimal endoscopic approach is still debatable. Conventional endoscopic mucosal resection (EMR) leads to frequent incomplete resection. Endoscopic submucosal dissection (ESD) allows higher complete resection rates but is also associated with higher complication rates. According to some studies, capassisted EMR (EMR-C) is an effective and safe alternative for endoscopic resection of r-NETs.  Aims:  This study aimed to evaluate the efficacy and safety of EMR-C for r-NETs &#8804;10 mm without muscularis propria invasion or lymphovascular infiltration.  Methods:  Single-center prospective study including consecutive patients with r-NETs &#8804;10 mm without muscularis propria invasion or lymphovascular invasion confirmed by endoscopic ultrasound (EUS), submitted to EMR-C between January 2017 and September 2021. Demographic, endoscopic, histopathologic, and follow-up data were retrieved from medical records.  Results:  A total of 13 patients (male: 54%; n = 7) with a median age of 64 (interquartile range: 54-76) years were included. Most lesions were located at the lower rectum (69.2%, n = 9), and median lesion size was 6 (interquartile range: 4.5-7.5) mm. On EUS evaluation, 69.2% (n = 9) of tumors were limited to muscularis mucosa. EUS accuracy for the depth of invasion was 84.6%. We found a strong correlation between size measurements by histology and EUS (r = 0.83, p &lt; 0.01). Overall, 15.4% (n = 2) were recurrent r-NETs and had been pretreated by conventional EMR. Resection was histologically complete in 92% (n = 12) of cases. Histologic analysis revealed grade 1 tumor in 76.9% (n = 10) of cases. Ki-67 index was inferior to 3% in 84.6% (n = 11) of cases. The median procedure time was 5 (interquartile range: 4-8) min. Only 1 case of intraprocedural bleeding was reported and was successfully controlled endoscopically. Follow-up was available in 92% (n = 12) of cases with a median follow-up of 6 (interquartile range: 12-24) months with no evidence of residual or recurrent lesion on endoscopic or EUS evaluation.  Conclusion:  EMR-C is fast, safe, and effective for resection of small r-NETs without high-risk features. EUS accurately assesses risk factors. Prospective comparative trials are needed to define the best endoscopic approach.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Introdução:  Os tumores neuroendócrinos do reto (r-NETs) apresentam incidência crescente. A maioria dos tumores de pequenas dimensões pode ser excisada endoscopicamente, no entanto, a abordagem ótima é controversa. A mucosectomia convencional associa-se, frequentemente, a resseção endoscópica incompleta. A disseção endoscópica submucosa (ESD) permite elevadas taxas de resseção completa, mas é tecnicamente complexa e associa-se a maior número de complicações. Alguns estudos sugerem a mucosectomia assistida por cap (EMR-C) como uma alternativa eficaz e segura.  Objetivo:  Este estudo pretendeu avaliar a eficácia e segurança da mucosectomia com cap na resseção de r-NETs com dimensões &#8804;10 mm, sem invasão da muscularis própria nem infiltração linfovascular.  Material e Métodos:  Estudo prospetivo unicêntrico incluindo consecutivamente r-NETs com &#8804;10 mm, sem invasão da muscularis própria ou linfovascular confirmada em ultrassonografia endoscópica (EUS), submetidos a mucosectomia assistida cap entre janeiro de 2017 e setembro de 2021. Colheita de dados demográficos, clínicos e histopatológicos através de registos médicos eletrónicos.  Resultados:  Incluídos 13 doentes (género masculino: 54%; n = 7) com idade mediana de 64 (intervalo interquartil [IIQ]: 54-76) anos. A maioria das lesões localizava-se no reto inferior (69.2%; n = 9) e apresentava tamanho mediano de 6 (IIQ: 4.5-7.5) mm. Na avaliação por EUS, 69.2% (n = 9) encontravam-se limitados à muscularis mucosa. A acuidade da EUS na avaliação do envolvimento das camadas da parede retal foi de 84.6% e o tamanho avaliado por EUS correlacionou-se fortemente com o medido na histologia (r = 0.83, p &lt; 0.01). Dois casos (15.4%) corresponderam a recorrências de mucosectomias convencionais prévias. A resseção foi macroscópica e histologicamente completa em 92% (n = 12) dos casos. A análise histológica revelou 76.9% (n = 10) tumores de grau 1. O índice Ki-67 foi inferior a 3% em 84.6% (n = 11) dos casos. O tempo mediano de procedimento foi 5 (IIQ: 4-8) minutos. Verificou-se apenas um caso de hemorragia intraprocedimento resolvida endoscopicamente. O seguimento de 92% dos casos (n = 12) com mediana de 6 (IIQ:12-24) meses não revelou lesão residual ou recorrên-cia em avaliações endoscópica e ultrassonográfica.  Discussão/Conclusão:  A EMR-C é uma técnica endoscópica segura, rápida e efetiva para a resseção de r-TNEs pequenos sem fatores de alto risco. A EUS apresenta elevada acuidade na avaliação dos fatores de risco. Estudos comparativos prospetivos são necessários para estabelecimento da abordagem endoscópica mais profícua.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Rectal neuroendocrine tumors]]></kwd>
<kwd lng="en"><![CDATA[Endoscopy]]></kwd>
<kwd lng="en"><![CDATA[Endoscopic mucosal resection]]></kwd>
<kwd lng="pt"><![CDATA[Tumores neuroendócrinos do reto]]></kwd>
<kwd lng="pt"><![CDATA[Endoscopia]]></kwd>
<kwd lng="pt"><![CDATA[Resseção endoscópica da mucosa]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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