<?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>S0120-99572025000300333</article-id>
<article-id pub-id-type="doi">10.22516/25007440.1264</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Collagenous Gastritis: An Unusual Cause of Anemia in Young Patients]]></article-title>
<article-title xml:lang="es"><![CDATA[Gastritis colágena: una causa inusual de anemia en pacientes jóvenes]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Plata-García]]></surname>
<given-names><![CDATA[Clara Eugenia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Guerra]]></surname>
<given-names><![CDATA[Maria Alexandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Huertas-Pacheco]]></surname>
<given-names><![CDATA[Sandra Judith]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Pontificia Universidad Javeriana  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Militar Nueva Granada  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2025</year>
</pub-date>
<volume>40</volume>
<numero>3</numero>
<fpage>333</fpage>
<lpage>338</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-99572025000300333&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-99572025000300333&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-99572025000300333&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Collagenous gastritis (CG) is a rare condition that, in most cases, presents with severe iron-deficiency anemia or recurrent abdominal pain. It is characterized by increased collagen deposition in the subepithelial mucosa, associated with inflammatory infiltrates in the lamina propria. Similar histological findings can be observed in collagenous enterocolitis. The pathophysiology and prognosis of the disease are not yet fully understood, and clinical presentation may vary according to age group. This report describes a 15-year-old female patient referred by hematology for evaluation of chronic anemia, accompanied by asthenia, adynamia, pica, and abdominal pain. Esophagogastroduodenoscopy revealed severe mucosal alterations in the gastric body, and thorough pathological review confirmed the diagnosis of collagenous gastritis. Histologically observed collagen deposits may be related to a generalized disease affecting different areas of the gastrointestinal tract. In light of this case, a review of the available literature was conducted.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La gastritis colágena (CG) es una enfermedad rara que, en la mayoría de los casos, se presenta con anemia ferropénica grave o dolor abdominal recurrente. Se caracteriza por un aumento de colágeno en la mucosa subepitelial, asociado con infiltrados inflamatorios en la lámina propia. Hallazgos histológicos similares se pueden observar en la enterocolitis colágena. La fisiopatología y el pronóstico de la enfermedad aún no se comprenden completamente. La presentación clínica puede variar según el grupo de edad. En este reporte, se presenta el caso de una paciente de 15 años remitida por hematología para el estudio de anemia crónica, acompañada de astenia, adinamia, PICA y dolor abdominal. La esofagogastroduodenoscopia reveló una alteración grave de la mucosa del cuerpo gástrico, y una revisión patológica exhaustiva confirmó el diagnóstico de gastritis colágena. Los depósitos de colágeno descritos histológicamente pueden estar relacionados con una enfermedad generalizada que afecta diferentes áreas del tracto gastrointestinal. A la luz de este caso, se realizó una revisión de la literatura disponible.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Gastritis]]></kwd>
<kwd lng="en"><![CDATA[anemia]]></kwd>
<kwd lng="en"><![CDATA[collagenous colitis]]></kwd>
<kwd lng="en"><![CDATA[celiac disease]]></kwd>
<kwd lng="es"><![CDATA[Gastritis]]></kwd>
<kwd lng="es"><![CDATA[anemia]]></kwd>
<kwd lng="es"><![CDATA[colitis colágena]]></kwd>
<kwd lng="es"><![CDATA[enfermedad celíaca]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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