<?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>1870-7203</journal-id>
<journal-title><![CDATA[Acta médica Grupo Ángeles]]></journal-title>
<abbrev-journal-title><![CDATA[Acta méd. Grupo Ángeles]]></abbrev-journal-title>
<issn>1870-7203</issn>
<publisher>
<publisher-name><![CDATA[Grupo Ángeles, Servicios de Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-72032023000300282</article-id>
<article-id pub-id-type="doi">10.35366/111356</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Melanoma anorrectal, una neoplasia poco común]]></article-title>
<article-title xml:lang="en"><![CDATA[Anorectal melanoma, a rare neoplasm]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrato Ruiz]]></surname>
<given-names><![CDATA[Jorge Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suro Santos]]></surname>
<given-names><![CDATA[Yeudiel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz Yonser]]></surname>
<given-names><![CDATA[Javier Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentes Hernández]]></surname>
<given-names><![CDATA[José Emilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sáenz Hernández]]></surname>
<given-names><![CDATA[Bárbara]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General de Zona No. 33 Departamento de Cirugía General]]></institution>
<addr-line><![CDATA[Monterrey Nuevo León]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<volume>21</volume>
<numero>3</numero>
<fpage>282</fpage>
<lpage>284</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-72032023000300282&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-72032023000300282&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-72032023000300282&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El melanoma anorrectal es poco frecuente con una incidencia de 0.4 a 1.6% del total de los melanomas, y 0.5% de los tumores malignos anorrectales; es frecuentemente confundido con la enfermedad hemorroidal y pólipos. Femenino de 53 años sin antecedentes, acudió por presentar sensación de cuerpo extraño en región anal y rectorragia de dos meses de evolución. En la exploración proctológica se detectó masa indurada en región lateral izquierda a 4 cm de margen anal, el guante explorador salió con restos hemáticos. La colonoscopia reportó lesión de 2 cm pediculada, friable y pigmentada localizada lateralmente en la línea dentada. Se somete a una resección local amplia transanal (RLAT). Patología reportó melanoma maligno, márgenes de resección positivos, en contacto con células neoplásicas. Fue manejada posteriormente con tratamiento adyuvante. Las opciones quirúrgicas son la RLAT y la resección abdominoperineal (RAP); de forma tradicional la RAP era considerada la mejor opción para el control locorregional de la enfermedad; sin embargo, estudios recientes no reportan diferencia en la supervivencia si se compara con la RLAT. La mayoría de los pacientes son diagnosticados en un curso tardío de la enfermedad, por lo tanto la cirugía curativa no es posible.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Anorectal melanoma is rare, with 0.4 to 1.6% of all melanomas and 0.5% of anorectal malignancies. Frequently confused with hemorrhoidal disease and polyps. A 53-year-old female with no previous history presented with a foreign body sensation in the anal region and rectorrhagia of two months&#8217; evolution. On proctologic examination, an indurated mass was detected in the left lateral region, 4 cm from the anal margin, and an examining glove came out with hematic debris. Colonoscopy reports a 2 cm pedunculated, friable, pigmented lesion located laterally in the dentate line. He underwent a wide local transanal resection (WLTR). Pathology reports malignant melanoma, positive resection margins, and in contact with neoplastic cells. She is subsequently treated with Nivolumab and adjuvant radiotherapy. The surgical options are WLTR and abdominoperineal resection (APR). Traditionally APR was considered the best option for locoregional control of the disease. However, recent studies report no difference in survival compared to WLTR. Most patients are diagnosed late in the disease; therefore, curative surgery is impossible.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[melanoma]]></kwd>
<kwd lng="es"><![CDATA[neoplasia rectal]]></kwd>
<kwd lng="es"><![CDATA[adulto]]></kwd>
<kwd lng="es"><![CDATA[neoplasia anal]]></kwd>
<kwd lng="es"><![CDATA[diagnóstico diferencial]]></kwd>
<kwd lng="en"><![CDATA[melanoma]]></kwd>
<kwd lng="en"><![CDATA[rectal neoplasm]]></kwd>
<kwd lng="en"><![CDATA[adult]]></kwd>
<kwd lng="en"><![CDATA[anal neoplasm]]></kwd>
<kwd lng="en"><![CDATA[differential diagnosis]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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</back>
</article>
