<?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>0035-0052</journal-id>
<journal-title><![CDATA[Revista mexicana de pediatría]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. pediatr.]]></abbrev-journal-title>
<issn>0035-0052</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Pediatría A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-00522025000300090</article-id>
<article-id pub-id-type="doi">10.35366/121495</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tiempo al diagnóstico y de inicio de tratamiento oncológico en pacientes pediátricos con tumores sólidos]]></article-title>
<article-title xml:lang="en"><![CDATA[Time to diagnosis and initiation of oncological treatment in pediatric patients with solid tumors]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rendón-Macías]]></surname>
<given-names><![CDATA[Mario Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pozo-Almanza]]></surname>
<given-names><![CDATA[Yasmani]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Panamericana Facultad de Ciencias de la Salud Departamento de Salud Pública]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Nacional &#8220;Dr. Silvestre Frenk Freund&#8221; Hospital de Pediatría]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<volume>92</volume>
<numero>3</numero>
<fpage>90</fpage>
<lpage>96</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-00522025000300090&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-00522025000300090&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-00522025000300090&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  el diagnóstico oncológico suele ser difícil y la prontitud del tratamiento influye en su pronóstico.  Objetivo:  comparar los tiempos requeridos para la confirmación diagnóstica e inicio del tratamiento oncológico en pacientes pediátricos con tumores sólidos, según el grado de sospecha al envío y sus condiciones clínicas.  Material y métodos:  se estudiaron 175 pacientes con diagnóstico de un tumor sólido, atendidos en un centro de tercer nivel de atención. Se incluyeron pacientes con sospecha, con diagnóstico histopatológico, o bien, pacientes que llegaron por un diagnóstico no oncológico. Se estimaron los tiempos para la referencia, para la confirmación diagnóstica (Lag-t-Dx) y para el inicio del tratamiento oncológico (Lag-t-Tx).  Resultados:  sesenta por ciento tuvieron tumores del sistema nervioso central, linfomas o tumores óseos; el 55.4% llegó en estadios III-IV. Del total, el 78.9% tenía sospecha de cáncer, 13.7% con diagnóstico histopatológico y 7.4% otro diagnóstico. Dieciocho se encontraban críticamente enfermos (10.3%). La mediana de días de referencia fue de dos (0-42 días), el Lag-t-Dx de cinco (0-45) y el Lag-t-Tx de ocho (2-49); los tiempos fueron más prolongados en pacientes con un diagnóstico de ingreso no oncológicos (Lag-t-Dx 13 días, Lag-t-Tx 15 días, p = 0.004 y p = 0.049). Lag-t-Dx no difirió con respecto al estadio, pero el Lag-t-Tx fue mayor en pacientes graves.  Conclusiones:  en general, se comprobó que los tiempos para establecer diagnóstico y tratamiento son similares a otros países, pero depende del nivel de sospecha y de las condiciones clínicas del paciente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  oncological diagnosis is often difficult, and the timeliness of treatment influences the prognosis.  Objective:  to compare the time required for diagnostic confirmation and for the initiation of oncological treatment in pediatric patients with solid tumors, according to the degree of suspicion at referral and the patients&#8217; clinical conditions.  Material and methods:  a total of 175 patients diagnosed with a solid tumor, treated at a tertiary care center, were studied. Patients with suspected cancer, with a histopathological diagnosis, or patients who arrived with a non-oncological diagnosis were included. The times to referral, diagnostic confirmation (Lag-t-Dx), and initiation of oncologic treatment (Lag-t-Tx) were estimated.  Results:  sixty percent had central nervous system tumors, lymphomas, or bone tumors; 55.4% arrived in stages III-IV. Of the total, 78.9% had suspected cancer, 13.7% had a histopathological diagnosis, and 7.4% had another diagnosis. Eighteen patients were critically ill (10.3%). The median number of days to referral was two (0-42 days), five (0-45) for Lag-t-Dx, and eight (2-49) for Lag-t-Tx; the time was longer in patients with a non-oncological admission diagnosis (Lag-t-Dx 13 days and Lag-t-Tx 15 days, p = 0.004 and p = 0.049). Lag-t-Dx did not differ with respect to stage, but Lag-t-Tx was higher in critically ill patients.  Conclusions:  in general, this study found that the time to establish diagnosis and treatment in cancer patients is similar to that in other countries but varies according to the level of suspicion and the patient&#8217;s clinical condition.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[cáncer]]></kwd>
<kwd lng="es"><![CDATA[niños]]></kwd>
<kwd lng="es"><![CDATA[diagnóstico]]></kwd>
<kwd lng="es"><![CDATA[tratamiento]]></kwd>
<kwd lng="es"><![CDATA[tiempo]]></kwd>
<kwd lng="es"><![CDATA[oportunidad]]></kwd>
<kwd lng="en"><![CDATA[cancer]]></kwd>
<kwd lng="en"><![CDATA[children]]></kwd>
<kwd lng="en"><![CDATA[diagnosis]]></kwd>
<kwd lng="en"><![CDATA[treatment]]></kwd>
<kwd lng="en"><![CDATA[time]]></kwd>
<kwd lng="en"><![CDATA[opportunity]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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