<?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>1870-199X</journal-id>
<journal-title><![CDATA[Revista odontológica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Odont. Mex]]></abbrev-journal-title>
<issn>1870-199X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Odontología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-199X2021000300264</article-id>
<article-id pub-id-type="doi">10.22201/fo.1870199xp.2021.25.3.83096</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tumor de la infancia infrecuente y localmente agresivo: reporte de caso de fibroma ameloblástico]]></article-title>
<article-title xml:lang="en"><![CDATA[Uncommon and locally aggressive tumor of childhood. An ameloblastic fibroma case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Félix Rojas]]></surname>
<given-names><![CDATA[Francisco Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salazar Navarro]]></surname>
<given-names><![CDATA[Luis Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benítez Pascual]]></surname>
<given-names><![CDATA[Julio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos Burgueño]]></surname>
<given-names><![CDATA[Efrén Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ochoa Viedas]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Urias Barreras]]></surname>
<given-names><![CDATA[J Cynthia Marina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Sinaloa Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General Regional No. 1 ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Sinaloa Centro de Investigación y Docencia en Ciencias de la Salud ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>25</volume>
<numero>3</numero>
<fpage>264</fpage>
<lpage>271</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2021000300264&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2021000300264&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2021000300264&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: El fibroma ameloblástico es un tumor odontogénico mixto, benigno e infrecuente; constituye 1.5-6.5% de los tumores odontogénicos. Se considera un tumor de la infancia, con ligera predilección por el género masculino y fuerte por la región posterior de la mandíbula. Su tratamiento más común, enucleación y curetaje es controversial, debido a la posibilidad de recurrencia y transformación maligna.  Presentación del caso: Se reporta un caso de paciente femenino de 12 años, con aumento de volumen asintomático en mandíbula del lado izquierdo. Radiográficamente, se observó una zona radiolúcida multilocular, en cuerpo mandibular y rama ascendente, asociada a un segundo molar inferior impactado y desplazado. Se realizó enucleación y curetaje con colocación de aloinjerto. En el examen microscópico, se observó una proliferación neoplásica de células mesenquimales sobre un estroma mixoide similar a la papila dental, y de células epiteliales dispuestas en folículos y cordones, sin formación de tejidos dentales duros. Por persistencia de la lesión, se realizó una reintervención quirúrgica con resección mandibular y colocación de placas de titanio. Después de 30 meses de seguimiento, la paciente se encuentra libre de lesión y en proceso de rehabilitación oral.  Conclusión: El fibroma ameloblástico puede mostrar un comportamiento agresivo persistente a un tratamiento conservador y requerir una intervención quirúrgica radical, por lo que el seguimiento a largo plazo es indispensable.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: Ameloblastic fibroma is a rare, benign, mixed odontogenic tumor which represents 1.5-6.5% of odontogenic tumors. It is considered a tumor of childhood, with a slight predilection for the male gender. Its most common site of occurrence is the posterior region of the mandible. Its most common treatments, enucleation, and curettage are controversial due to the possibility of recurrence and malignant transformation.  Case report: A case of a 12-year-old female patient is reported, with asymptomatic swelling in the left mandible. Radiographically, a multilocular radiolucent area was observed, in the mandibular body and ascending ramus, associated with an impacted and displaced lower second molar. Enucleation and curettage were performed with allograft placement. Microscopic examination revealed a neoplastic proliferation of mesenchymal cells on a myxoid stroma similar to the dental papilla, and of epithelial cells arranged in follicles and cords, with no hard dental tissues. Due to lesion persistence, another surgical intervention was performed with mandibular resection and titanium plates placement. After a thirty months follow-up, the patient does not have lesions and undergoing oral rehabilitation.  Conclusion: Ameloblastic fibroma may show an aggressive persistent behavior to a conservative treatment and a radical surgical intervention could be necessary, so long-term follow-up is essential.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Tumor odontogénico]]></kwd>
<kwd lng="es"><![CDATA[fibroma ameloblástico]]></kwd>
<kwd lng="es"><![CDATA[mandíbula]]></kwd>
<kwd lng="es"><![CDATA[fibroodontoma]]></kwd>
<kwd lng="en"><![CDATA[Odontogenic tumor]]></kwd>
<kwd lng="en"><![CDATA[ameloblastic fibroma]]></kwd>
<kwd lng="en"><![CDATA[mandible]]></kwd>
<kwd lng="en"><![CDATA[fibroodontoma]]></kwd>
</kwd-group>
</article-meta>
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