<?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>0120-9957</journal-id>
<journal-title><![CDATA[Revista colombiana de Gastroenterología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. colomb. Gastroenterol.]]></abbrev-journal-title>
<issn>0120-9957</issn>
<publisher>
<publisher-name><![CDATA[Asociación Colombiana de Gastroenterología  ]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-99572021000400501</article-id>
<article-id pub-id-type="doi">10.22516/25007440.603</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Right colon neuroendocrine tumor in a patient with ulcerative colitis: A case study]]></article-title>
<article-title xml:lang="es"><![CDATA[Tumor neuroendocrino de colon derecho en un paciente con colitis ulcerativa: a propósito de un caso]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz-Cedeño,]]></surname>
<given-names><![CDATA[Rubén Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez,]]></surname>
<given-names><![CDATA[Priscila]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Chica,]]></surname>
<given-names><![CDATA[Gema Nathalye]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paullan-Sani,]]></surname>
<given-names><![CDATA[Vivian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santillán-López,]]></surname>
<given-names><![CDATA[Wendy Fabiola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ricaurte-Enríquez.]]></surname>
<given-names><![CDATA[Michelle]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital de Especialidades Dr. Abel Gilbert Ponton  ]]></institution>
<addr-line><![CDATA[Guayaquil ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital de Especialidades Dr. Abel Gilbert Ponton  ]]></institution>
<addr-line><![CDATA[Guayaquil ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Universitario de Guayaquil  ]]></institution>
<addr-line><![CDATA[Guayaquil ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital de Especialidades Dr. Abel Gilbert Ponton  ]]></institution>
<addr-line><![CDATA[Guayaquil ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Hospital de Especialidades Dr. Abel Gilbert Ponton  ]]></institution>
<addr-line><![CDATA[Guayaquil ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>36</volume>
<numero>4</numero>
<fpage>501</fpage>
<lpage>506</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-99572021000400501&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-99572021000400501&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-99572021000400501&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Neuroendocrine colon tumors are relatively unknown compared with sporadic colorectal cancer; its incidence is low, and it is generally located in the cecum, sigmoid colon, and rectum. The existing relation between neuroendocrine tumors and ulcerative colitis is not frequently described due to the chronic inflammation that leads to neuroendocrine cell differentiation from multipotential cells in the dysplastic epithelium, which can be responsible for colorectal neuroendocrine carcinomas development. The study refers to the case of a patient of 57 years old with ulcerative colitis, abdominal pain, weight loss, and liquid diarrhea with mucus. Physical examination revealed a hardened lesion in the right colonic framework with the tomography of a neoplastic lesion in the ascending colon. When the patient was hospitalized, he developed an intestinal obstruction. A hemicolectomy plus ileostomy procedure was performed resulting in a large cell G3 neuroendocrine tumor in the ascending colon revealed in the biopsy. In this article, the aspects related to the pathophysiology, diagnosis, and treatment of the association of these two pathologies are reviewed in a practical way.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los tumores neuroendocrinos del colon son relativamente raros en comparación con el carcinoma colorrectal esporádico; su incidencia es muy baja y la localización más frecuente es en el ciego, colon sigmoideo y recto. Se describe con poca frecuencia la asociación de tumor neuroendocrino con la colitis ulcerativa debido a la inflamación crónica que conduce a la diferenciación de células neuroendocrinas a partir de células multipotenciales en el epitelio displásico, que puede ser responsable del desarrollo de carcinomas neuroendocrinos colorrectales. La presentación del caso se trata de un paciente de 57 años de edad con colitis ulcerativa con cuadro de dolor abdominal, pérdida de peso y diarreas líquidas con moco. En el examen físico presentó una lesión endurecida en el marco colónico derecho con tomografía de lesión neoplásica en el colon ascendente y en su hospitalización presentó un cuadro de oclusión intestinal, por lo que se le realizó una hemicolectomía más ileostomía, cuyo resultado en la biopsia fue un tumor neuroendocrino G3 de células grandes en el colon ascendente. En este artículo se revisan de forma práctica los aspectos relacionados con la fisiopatología, diagnóstico y tratamiento de la asociación de estas dos patologías.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Gastrointestinal neuroendocrine tumor]]></kwd>
<kwd lng="en"><![CDATA[Ulcerative colitis]]></kwd>
<kwd lng="en"><![CDATA[Inflammatory bowel disease]]></kwd>
<kwd lng="en"><![CDATA[Neuroendocrine colon tumors]]></kwd>
<kwd lng="es"><![CDATA[Tumor neuroendocrino gastrointestinal]]></kwd>
<kwd lng="es"><![CDATA[colitis ulcerativa]]></kwd>
<kwd lng="es"><![CDATA[enfermedad inflamatoria intestinal]]></kwd>
<kwd lng="es"><![CDATA[tumor de colon neuroendocrino]]></kwd>
</kwd-group>
</article-meta>
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