<?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>S1665-11462019000600294</article-id>
<article-id pub-id-type="doi">10.24875/bmhim.19000135</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Melanocitosis dérmica adquirida en la mano de un paciente pediátrico]]></article-title>
<article-title xml:lang="en"><![CDATA[Acquired dermal melanocytosis on the hand of a pediatric patient]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marín-Hernández]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marín-González]]></surname>
<given-names><![CDATA[Eduardo J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Siordia-Reyes]]></surname>
<given-names><![CDATA[Georgina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro Médico Nacional Siglo XXI Hospital de Pediatría Servicio de Dermatología]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro Médico Nacional Siglo XXI Hospital de Pediatría Servicio de Patología]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>76</volume>
<numero>6</numero>
<fpage>294</fpage>
<lpage>297</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-11462019000600294&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-11462019000600294&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-11462019000600294&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  Las melanocitosis dérmicas son un grupo de enfermedades dermatológicas pigmentarias asociadas con la proliferación melanocítica. Se clasifican con base en su número y localización profunda a nivel de la dermis; pueden ser congénitas o adquiridas.  Caso clínico:  Paciente de sexo masculino de 11 años de edad, sin antecedentes de importancia para el padecimiento actual. Inicio con mácula oscura en la palma de la mano izquierda hace 5 años, asintomática, de crecimiento paulatino. A la exploración física, se detectó dermatosis que afectaba la palma izquierda, cara palmar de las falanges proximales del tercer y cuarto dedos, caracterizada por la presencia de mácula grisácea negruzca, bordes difusos e irregulares, no infiltrada ni indurada. En la dermatoscopia se detectó un patrón de pigmento de tono gris acero con áreas de color café, y con evidencia de puntos blanquecinos dentro de estas. En la histopatología se identificaron células fusiformes, con núcleo grande y la presencia de pigmento melánico en su interior, con distribución perivascular y entremezclados con las fibras de colágeno en la dermis superficial y media. Con base en las características clínicas e histopatológicas de la lesión, se concluyó melanocitosis dérmica adquirida de la mano como el diagnóstico definitivo.  Conclusiones:  Los reportes de casos de melanocitosis dérmica adquiridas atípicas son infrecuentes. La melanocitosis dérmica de la mano es una variante de estas enfermedades, de la que existen menos de 10 casos. Se presenta el primer caso reportado en Latinoamérica hasta el momento, con el objetivo de ampliar el conocimiento de sus características clínico-histológicas y dermatoscópicas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  Dermal melanocytosis is a group of pigmentary dermatological diseases associated with melanocytic proliferation, which are classified based on their number and depth at the level of the dermis; they may be congenital or acquired.  Case report:  An 11-year-old male patient with no history of importance for the current condition started 5 years ago with a dark macula in the left hand palm, which was asymptomatic but grew gradually. On physical examination, dermatoses affecting the left palm, palmar face of proximal phalanges of the third, fourth and fifth fingers, characterized by the presence of blackish greyish macula, diffuse and irregular edges, not infiltrated or indurated were detected. The dermatoscopy identified a pattern of pigment with a greyish-brown tone with brown areas, showing whitish spots inside. In the histopathology, the presence of spindle cells was observed in the superficial and middle dermis, with a large nucleus and the presence of a melanic pigment inside, with perivascular distribution and intermingled with the collagen fibres. Based on the clinical characteristics and the histopathological findings, acquired dermal melanocytosis of the hand was concluded as the final diagnosis.  Conclusions:  Case reports of atypical acquired dermal melanocytosis are infrequent. Dermal melanocytosis of the hand is a rare variant of these diseases, of which less than 10 cases have been reported. At present, this case of dermal melanocytosis is the first reported in Latin America with the aim to extend the knowledge of its clinical-histological and dermatoscopic characteristics.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Melanocitosis dérmica]]></kwd>
<kwd lng="es"><![CDATA[Mano]]></kwd>
<kwd lng="es"><![CDATA[Escolar]]></kwd>
<kwd lng="en"><![CDATA[Dermal melanocytosis]]></kwd>
<kwd lng="en"><![CDATA[Acquired]]></kwd>
<kwd lng="en"><![CDATA[Hand]]></kwd>
<kwd lng="en"><![CDATA[Grade-schooler]]></kwd>
</kwd-group>
</article-meta>
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