<?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>1665-1146</journal-id>
<journal-title><![CDATA[Boletín médico del Hospital Infantil de México]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Med. Hosp. Infant. Mex.]]></abbrev-journal-title>
<issn>1665-1146</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud, Hospital Infantil de México Federico Gómez]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-11462020000100023</article-id>
<article-id pub-id-type="doi">10.24875/bmhim.19000070</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Pediatric penetrating keratoplasty and graft rejection: experience at the Hospital Infantil de México Federico Gómez]]></article-title>
<article-title xml:lang="es"><![CDATA[Queratoplastia penetrante pediátrica y rechazo corneal: experiencia en el Hospital Infantil de México Federico Gómez]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velásquez-Monzón]]></surname>
<given-names><![CDATA[Karen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarro-Peña]]></surname>
<given-names><![CDATA[Mariana C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Klunder-Klunder]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tsatsos]]></surname>
<given-names><![CDATA[Michael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Ortiz]]></surname>
<given-names><![CDATA[Marco A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Infantil de México Federico Gómez Department of Transplant Surgery ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Infantil de México Federico Gómez Department of Pediatric Ophthalmology ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Infantil de México Federico Gómez  ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Dorset County Hospital NHS Foundation Trust Royal Eye Infirmary ]]></institution>
<addr-line><![CDATA[Dorchester ]]></addr-line>
<country>United Kingdom</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Aristotelian University of Thessaloniki  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Greece</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2020</year>
</pub-date>
<volume>77</volume>
<numero>1</numero>
<fpage>23</fpage>
<lpage>27</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-11462020000100023&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-11462020000100023&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-11462020000100023&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Penetrating keratoplasty (PK) is a challenging surgical ocular procedure indicated for some pediatric patients with vision-threatening corneal disease damage. Pediatric PK is reserved for cases with advanced pathology or dysfunction as rejection and failure rates greatly supersede the rates of adult PK. The objective was to identify factors associated with graft rejection and failure amongst Mexican children undergoing primary PK for different indications.  Methods: A retrospective review of consecutive pediatric PK medical records was conducted between 2001 and 2015 at the Hospital Infantil de México Federico Gómez. Graft survival was calculated using the Kaplan–Meier survival method.  Results: During the 15 years of study, 67 eyes of 57 patients underwent PK. The mean age at the time of surgery was 11 years. The mean follow-up duration was 44 months. Keratoconus was the most common indication for PK (61%) followed by herpetic keratitis (15%) and other corneal dystrophies (10%). Mean graft survival time was 45.6 months (95% confidence interval 31.8-58.4 months, standard deviation = 0.069), with a survival rate of 70% at 1 year. Univariate Cox proportional hazard showed that being &lt; 9 years of age at the time of the surgery (p = 0.023) and corneal dystrophies (p = 0.04) were prognostic factors for corneal rejection. Five eyes of five patients developed graft failure.  Conclusions: Pediatric PK patients commonly experience graft rejection, which need to be promptly diagnosed and treated to minimize permanent damage. The age at the time of surgery and congenital corneal opacities is factors associated with a higher risk of rejection and failure.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La queratoplastia penetrante (QP) es un procedimiento quirúrgico indicado en algunos pacientes pediátricos con daño corneal con riesgo de fracaso que amenaza la visión. El objetivo del presente trabajo fue identificar los factores asociados a rechazo y fallo del injerto corneal en niños sometidos a QP.  Métodos: Serie de casos de pacientes sometidos a QP en el Hospital Infantil de México Federico Gómez entre 2001 y 2015. La sobrevida del injerto fue calculada por el método de estimación de la función de supervivencia Kaplan–Meier.  Resultados: Durante 15 años de estudio, 67 ojos de 57 pacientes fueron sometidos a QP. El promedio de edad de los pacientes al tiempo de la cirugía fue de 11 años. El seguimiento promedio fue de 44 meses. El queratocono fue la indicación más común de QP (61%), seguido de queratitis herpética (15%) y otras distrofias corneales (10%). El tiempo promedio de sobrevida fue 45.6% (intervalo de confianza [IC] 95%: 31.8-58.4 meses, desviación estándar [DS] = 0.069), con una tasa de sobrevida del 70% a 1 año. El riesgo proporcional de Cox univariado mostró que una edad &lt; 9 años al momento de la cirugía (p = 0.023) y distrofias corneales (p = 0.04) son factores pronóstico para el rechazo corneal. Cinco ojos de cinco pacientes desarrollaron falla del injerto.  Conclusiones: El rechazo del injerto en QP en pacientes pediátricos es común y puede ser resuelto satisfactoriamente en casi todos los casos con diagnóstico y tratamiento. La edad al momento de la cirugía y las opacidades corneales congénitas son factores asociados con el rechazo y fallo.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Penetrating keratoplasty]]></kwd>
<kwd lng="en"><![CDATA[Graft survival]]></kwd>
<kwd lng="en"><![CDATA[Organ transplantation]]></kwd>
<kwd lng="en"><![CDATA[Keratoconus]]></kwd>
<kwd lng="es"><![CDATA[Queratoplastia penetrante]]></kwd>
<kwd lng="es"><![CDATA[Sobrevida del injerto]]></kwd>
<kwd lng="es"><![CDATA[Trasplante de órganos]]></kwd>
<kwd lng="es"><![CDATA[Queratocono]]></kwd>
</kwd-group>
</article-meta>
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