<?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 Col 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>S0120-99572020000100123</article-id>
<article-id pub-id-type="doi">10.22516/25007440.317</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Leiomiosarcoma y colitis ulcerosa: reporte de caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Leiomyosarcoma and ulcerative colitis: Case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado Martínez]]></surname>
<given-names><![CDATA[Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[San Miguel Amelivia]]></surname>
<given-names><![CDATA[Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Savescu]]></surname>
<given-names><![CDATA[Theodora]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Butrón Villa]]></surname>
<given-names><![CDATA[Mercedes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Universitario Getafe  ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>España</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Universitario Getafe  ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>35</volume>
<numero>1</numero>
<fpage>123</fpage>
<lpage>126</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-99572020000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-99572020000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-99572020000100123&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los pacientes con colitis ulcerosa (CU) y enfermedad de Crohn (EC) presentan un mayor riesgo de cáncer colorrectal (CCR), debido a la inflamación crónica, la susceptibilidad genética y los factores de riesgo ambientales. Sin embargo, las neoplasias no epiteliales son infrecuentes. Presentamos el caso de un varón de 83 años con una CU de larga evolución, que presenta una lesión polipoide. Una vez resecada, se diagnosticó de un leiomiosarcoma de alto grado. En la literatura, únicamente se han publicado tres casos previos de leiomiosarcoma en pacientes con CU, por lo que este reporte representaría el cuarto caso. La asociación directa de la CU y el leiomiosarcoma no ha sido bien establecida. No obstante, se sugiere que la inmunosupresión y la inflamación crónica son factores de riesgo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Ulcerative colitis (UC) and Crohn&#8217;s disease (CD) patients present an increased risk of colorectal cancer (CRC) due to chronic inflammation, genetic susceptibility and environmental risk factors. In contrast, non-epithelial neoplasms are uncommon. We discuss the case of an 83-year-old male with a long-standing UC, presenting with a polypoid lesion. Once resected, the lesion was identified as a high-grade leiomyosarcoma. A review of the literature revealed that only three previous cases of leiomyosarcoma among patients with UC have been published. Thus, this one would represent the fourth case where this rare non-epithelial neoplasm was detected in a patient with UC. The direct association of UC and leiomyosarcoma has not been well established; however, immunosuppression is suggested to be a risk factor for leiomyosarcoma in the literature.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Leiomiosarcoma]]></kwd>
<kwd lng="es"><![CDATA[enfermedad inflamatoria intestinal]]></kwd>
<kwd lng="es"><![CDATA[colitis ulcerosa (CU)]]></kwd>
<kwd lng="es"><![CDATA[detección de displasia]]></kwd>
<kwd lng="en"><![CDATA[Leiomyosarcoma]]></kwd>
<kwd lng="en"><![CDATA[inflammatory bowel disease]]></kwd>
<kwd lng="en"><![CDATA[ulcerative colitis]]></kwd>
<kwd lng="en"><![CDATA[dysplasia screening]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Fisher]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Judson]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Thomas]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soft-tissue sarcomas in adults]]></article-title>
<source><![CDATA[N Engl J Med]]></source>
<year>2005</year>
<volume>353</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>701-11</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hilal]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Barada]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Mukherji]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Temraz]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Shamseddine]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gastrointestinal (GI) leiomyosarcoma (LMS) case series and review on diagnosis, management, and prognosis]]></article-title>
<source><![CDATA[Med Oncol]]></source>
<year>2016</year>
<volume>33</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>20</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Bello]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Weber]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Umanskiy]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Rectal leiomyosarcoma in association with ulcerative colitis: a rare condition with an unusual presentation]]></article-title>
<source><![CDATA[Int J Colorectal Dis]]></source>
<year>2014</year>
<volume>29</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>887-8</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Scarpa]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Castagliuolo]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Castoro]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Pozza]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Scarpa]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Kotsafti]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Inflammatory colonic carcinogenesis: a review on pathogenesis and immunosurveillance mechanisms in ulcerative colitis]]></article-title>
<source><![CDATA[World J Gastroenterol]]></source>
<year>2014</year>
<volume>20</volume>
<numero>22</numero>
<issue>22</issue>
<page-range>6774-85</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jayakumar]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Basu]]></surname>
<given-names><![CDATA[PP]]></given-names>
</name>
<name>
<surname><![CDATA[Huang]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Axiotis]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Postirradiation Leiomyosarcoma of Rectum Presenting as a Polyp: Case Report and Review of the Literature]]></article-title>
<source><![CDATA[Int J Surg Pathol]]></source>
<year>2016</year>
<volume>24</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>163-9</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Granero-Peiró]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Ortega]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez-Justicia]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández-Lizoáin]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Leiomyosarcoma of the ascending colon: a rare tumor with poor prognosis]]></article-title>
<source><![CDATA[Rev Esp Enferm Dig]]></source>
<year>2015</year>
<volume>107</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>584-5</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Akutsu]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Mizokami]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Suzuki]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Terasaki]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Narasaka]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Kaneko]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A Rare Case of Colonic Leiomyosarcoma in Association with Ulcerative Colitis]]></article-title>
<source><![CDATA[Intern Med]]></source>
<year>2016</year>
<volume>55</volume>
<numero>19</numero>
<issue>19</issue>
<page-range>2799-803</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yamamoto]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Handa]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Tobo]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Setsu]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Fujita]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Oshiro]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Clinicopathological features of primary leiomyosarcoma of the gastrointestinal tract following recognition of gastrointestinal stromal tumours]]></article-title>
<source><![CDATA[Histopathology]]></source>
<year>2013</year>
<volume>63</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>194-207</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Magro]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Gionchetti]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Eliakim]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Ardizzone]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Armuzzi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Barreiro-de Acosta]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Third European Evidence-based Consensus on Diagnosis and Management of Ulcerative Colitis. Part 1: Definitions, Diagnosis, Extra-intestinal Manifestations, Pregnancy, Cancer Surveillance, Surgery, and Ileo-anal Pouch Disorders]]></article-title>
<source><![CDATA[J Crohns Colitis]]></source>
<year>2017</year>
<volume>11</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>649-70</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Butcher]]></surname>
<given-names><![CDATA[RO]]></given-names>
</name>
<name>
<surname><![CDATA[Titi]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Limdi]]></surname>
<given-names><![CDATA[JK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mesenchymal tumours, immunosuppression and inflammatory bowel disease: rare, real or fortuitous?]]></article-title>
<source><![CDATA[J Crohns Colitis]]></source>
<year>2011</year>
<volume>5</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>645-6</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
