<?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>1405-0099</journal-id>
<journal-title><![CDATA[Cirujano general]]></journal-title>
<abbrev-journal-title><![CDATA[Cir. gen]]></abbrev-journal-title>
<issn>1405-0099</issn>
<publisher>
<publisher-name><![CDATA[Asociación Mexicana de Cirugía General A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-00992017000400232</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Melanoma anorrectal, reporte de un caso y revisión de la literatura]]></article-title>
<article-title xml:lang="en"><![CDATA[Anorectal melanoma: a case report and literature review]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montes-Osorio]]></surname>
<given-names><![CDATA[Zaira Eunice]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno-Berber]]></surname>
<given-names><![CDATA[José Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital General Zona Norte  ]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital General Zona Norte  ]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>39</volume>
<numero>4</numero>
<fpage>232</fpage>
<lpage>236</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-00992017000400232&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-00992017000400232&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-00992017000400232&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El melanoma anorrectal es un tumor raro de origen neuroectodérmico que constituye el 1% de los tumores malignos colorrectales y entre el 0.4 y 1.6% de los melanomas en general. Habitualmente son lesiones polipoides con o sin pigmentación. En el momento del diagnóstico, el 60% de los pacientes presentan afectación ganglionar y el 20% metástasis a distancia. Para su estadificación, se utiliza el sistema simplificado de Ballantyne. Tiene un peor pronóstico en comparación con el melanoma cutáneo. La cirugía es el tratamiento de elección, pero existe una importante controversia acerca de la extensión de la resección.  Caso clínico:  Masculino de 50 años; inició con dolor y aumento de volumen a nivel perianal, de carácter progresivo. Fue manejado como absceso isquiorrectal y sometido a tratamiento quirúrgico en forma urgente; se identificó una lesión neoplásica de aspecto polipoide dependiente del recto, con extensión hacia la región perianal y absceso agregado. La colonoscopia mostró obstrucción del 90% de la luz del recto distal, el reporte histopatológico de la resección-biopsia fue compatible con melanoma anorrectal. Se efectuó colostomía laparoscópica y manejo paliativo con radioterapia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Anorectal melanoma is a rare tumor of neuroectodermal origin that makes up 1% of colorectal cancers and between 0.4 and 1.6% of melanomas in general. They are usually polypoid lesions with or without pigmentation. At the time of diagnosis, 60% of patients have lymph node involvement and 20% distant metastasis. For staging, the simplified Ballantyne system is used. It has a worse prognosis compared with cutaneous melanoma. Surgery is the treatment of choice, but there is significant controversy about the extent of the resection surgery.  Clinical case:  50-year-old male; he presented with progressive pain and volume increase in the perianal region. It was treated as ischiorectal abscess and underwent urgent surgical treatment. A neoplastic lesion of polypoid aspect was identified, dependent on the rectum, extending to the perianal region, as well as an added abscess. The colonoscopy showed 90% of lumen obstruction of distal rectum; the histopathological report of the tumor resection- biopsy was compatible with anorectal melanoma. Laparoscopic colostomy and palliative management with radiotherapy were carried out.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Melanoma anorrectal]]></kwd>
<kwd lng="es"><![CDATA[tratamiento]]></kwd>
<kwd lng="es"><![CDATA[melanoma maligno]]></kwd>
<kwd lng="es"><![CDATA[melanoma mucoso]]></kwd>
<kwd lng="es"><![CDATA[recto]]></kwd>
<kwd lng="en"><![CDATA[Anorectal melanoma]]></kwd>
<kwd lng="en"><![CDATA[treatment]]></kwd>
<kwd lng="en"><![CDATA[malignant melanoma]]></kwd>
<kwd lng="en"><![CDATA[mucosal melanoma]]></kwd>
<kwd lng="en"><![CDATA[rectum]]></kwd>
</kwd-group>
</article-meta>
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