<?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>2011-0839</journal-id>
<journal-title><![CDATA[Universitas Medica]]></journal-title>
<abbrev-journal-title><![CDATA[Univ. Med.]]></abbrev-journal-title>
<issn>2011-0839</issn>
<publisher>
<publisher-name><![CDATA[Pontificia Universidad Javeriana]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2011-08392022000100009</article-id>
<article-id pub-id-type="doi">10.11144/javeriana.umed63-1.vita</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Concentraciones elevadas de vitamina B12: ¿cómo interpretarlas?]]></article-title>
<article-title xml:lang="en"><![CDATA[High Vitamin B12 Levels: How to Interpret Them?]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Molina-Pimienta]]></surname>
<given-names><![CDATA[Luisana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rondón-Carvajal]]></surname>
<given-names><![CDATA[Julián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salgado-Sánchez]]></surname>
<given-names><![CDATA[Juan Camilo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Pontificia Universidad Javeriana Hospital Universitario San Ignacio ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Pontificia Universidad Javeriana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Pontificia Universidad Javeriana Hospital Universitario San Ignacio ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<volume>63</volume>
<numero>1</numero>
<fpage>81</fpage>
<lpage>91</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S2011-08392022000100009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S2011-08392022000100009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S2011-08392022000100009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las concentraciones elevadas de vitamina B12 (o hipervitaminemia B12) son un hallazgo frecuente y subestimado en la práctica clínica, muchas veces incidental. Se requiere un enfoque metódico que permita no solo descartar una deficiencia funcional según el contexto, sino también orientar su etiología, teniendo en cuenta que podría ser un hallazgo temprano en el curso entidades de pronóstico ominoso, como algunos tumores sólidos, enfermedades hepáticas de curso agudo o crónico y trastornos mieloproliferativos, dentro de los que destaca la leucemia mieloide crónica. De igual forma, permite diferenciar causas primarias de recuentos celulares elevados tanto de linaje eritroide (policitemias) como mieloide (neutrofilia o eosinofilia). El artículo propone un algoritmo diagnóstico, basado en la literatura médica disponible a la fecha sobre el tema.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract High levels of cobalamin (Hypervitaminemia b12) are a frequent and underestimated finding in clinical practice, often incidental. A methodical approach is required, which allows not only to rule out a functional deficiency of the same according to the context, but also to guide its etiology, considering that it could be an early finding in the course of ominous prognostic entities, such as some solid tumors, liver diseases of acute or chronic course and myeloproliferative disorders, among which chronic myeloid leukemia stands out. Similarly, it allows differentiating primary causes of high cell counts from both erythroid lineage (polycythemia) and myeloid lineage (neutrophilia, eosinophilia). A diagnostic algorithm is proposed, based on the medical literature available to date on the subject.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[vitamina B12]]></kwd>
<kwd lng="es"><![CDATA[transcobalaminas]]></kwd>
<kwd lng="es"><![CDATA[hipervitaminemia B12]]></kwd>
<kwd lng="es"><![CDATA[trastornos mieloproliferativos]]></kwd>
<kwd lng="es"><![CDATA[cáncer]]></kwd>
<kwd lng="es"><![CDATA[metástasis]]></kwd>
<kwd lng="en"><![CDATA[B12 vitamin]]></kwd>
<kwd lng="en"><![CDATA[transcobalamins]]></kwd>
<kwd lng="en"><![CDATA[hypervitaminemia b12]]></kwd>
<kwd lng="en"><![CDATA[myeloproliferative disorders]]></kwd>
<kwd lng="en"><![CDATA[cancer]]></kwd>
<kwd lng="en"><![CDATA[neoplasm metastasis]]></kwd>
</kwd-group>
</article-meta>
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