<?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>2444-054X</journal-id>
<journal-title><![CDATA[Cirugía y cirujanos]]></journal-title>
<abbrev-journal-title><![CDATA[Cir. cir.]]></abbrev-journal-title>
<issn>2444-054X</issn>
<publisher>
<publisher-name><![CDATA[Academia Mexicana de Cirugía A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2444-054X2019000300278</article-id>
<article-id pub-id-type="doi">10.24875/ciru.18000541</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tumores primarios de ámpula de Vater: estadificación prequirúrgica por ultrasonido endoscópico. Estudio de prueba diagnóstica]]></article-title>
<article-title xml:lang="en"><![CDATA[Ampulary tumors: presurgical staging by endoscopic ultrasonography. Diagnostic test study]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Membrillo-Romero]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuente-Lira]]></surname>
<given-names><![CDATA[Mauricio De la]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carvallo-Guevara]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rendón-Macías]]></surname>
<given-names><![CDATA[Mario E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Riojas-Garza]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Departamento de Endoscopía Gastrointestinal y Ultrasonido Endoscópico ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Nacional Siglo XXI Hospital de Especialidades Dr. Bernardo Sepúlveda G.]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Nacional Siglo XXI Coordinación de Investigación en Salud]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Panamericana Escuela de Medicina ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<volume>87</volume>
<numero>3</numero>
<fpage>278</fpage>
<lpage>284</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2444-054X2019000300278&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2444-054X2019000300278&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2444-054X2019000300278&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Comparar el ultrasonido endoscópico (USE) en la valoración de los tumores ampulares primarios (TAp) con referencia al estudio histopatológico (HP).  Método: Estudio retrospectivo prolectivo de pruebas diagnósticas en pacientes con TAp estadificados por USE y pancreatoduodenectomía con estudio HP, atendidos de 2012 a 2018 en un hospital de tercer nivel de atención.  Resultados: Fueron incluidos14 pacientes con adenocarcinoma. El tamaño del tumor medido por USE mostró una adecuada correlación (R = 0.65; p = 0.01) con el HP. La exactitud en la determinación de la invasión a la pared duodenal, el páncreas y el conducto biliar fue del 78.5, el 78.5 y el 57.1%, respectivamente. Por HP hubo tres T1 (21.4%), dos T2 (14.2%) y nueve T3 (64.2%). La exactitud del estadiaje T y N por USE fue del 71.4% (kappa = 0.50) y del 50% (kappa = &#8722;0.04), respectivamente. Los errores en la estadificación fueron más frecuentes en los pacientes con prótesis biliar.  Conclusión: El USE mostró utilidad en la determinación del tamaño tumoral y de la invasión al duodeno y al páncreas, y más limitada en la determinación de la invasión al conducto biliar por presencia de prótesis. Se observa una sobreestimación del estadiaje T y una subestimación del N. Es necesario mayor capacitación y sugerimos realizarse antes de colocar una prótesis biliar.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Objective: To analyze the accuracy of endoscopic ultrasound (EUS) in the evaluation of ampullary tumors compared to histopathology (HP) staging.  Methods: A retrospective diagnostic test study. Patients with ampullary tumors staged by EUS and postpancreatoduodenectomy HP attended during 2012-2018 at tertiary level hospital.  Results: 14 patients with adenocarcinoma where included. Tumor size measured by EUS showed an adequate correlation (R = 0.65; p= 0.01) with HP. The accuracy in the evaluation of duodenal wall, pancreatic, and biliary duct invasion was 78.5, 78.5 and 57.1%, respectively. By HP, there were three T1 (21.4%), two T2 (14.2%) and nine T3 (64.2%). The accuracy of T and N staging by EUS was 71.4% (kappa = 0.50) and 50% (kappa = &#8722;0.04) respectively. There were more staging errors in patients with biliary stent.  Conclusion: EUS was useful in estimating tumor size, duodenal wall and pancreatic invasion. Limitation was found in the evaluation of biliary duct invasion, as well as overestimation of T stage and underestimation of N stage. It is necessary an increased effort in ultrasonography training. We suggest EUS testing before biliary stenting.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Estadificación]]></kwd>
<kwd lng="es"><![CDATA[Tumor ampular primario]]></kwd>
<kwd lng="es"><![CDATA[Ultrasonido endoscópico]]></kwd>
<kwd lng="en"><![CDATA[Ampullary tumor]]></kwd>
<kwd lng="en"><![CDATA[Endoscopic ultrasound]]></kwd>
<kwd lng="en"><![CDATA[Staging]]></kwd>
</kwd-group>
</article-meta>
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