<?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>1646-2890</journal-id>
<journal-title><![CDATA[Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Port Estomatol Med Dent Cir Maxilofac]]></abbrev-journal-title>
<issn>1646-2890</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Estomatologia e Medicina Dentária]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1646-28902023000100050</article-id>
<article-id pub-id-type="doi">10.24873/j.rpemd.2023.03.1054</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Metastasis to the sublingual gland of metaplastic breast carcinoma - a case report]]></article-title>
<article-title xml:lang="pt"><![CDATA[Metástase para a glândula sublingual de um carcinoma metaplásico da mama - relato de caso]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almeida]]></surname>
<given-names><![CDATA[Vânia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salgado]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferraz]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carvalho]]></surname>
<given-names><![CDATA[Lina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro Hospitalar e Universitário de Coimbra Serviço de Anatomia Patológica ]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade de Coimbra Faculdade de Medicina ]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro Hospitalar e Universitário de Coimbra Serviço de Estomatologia ]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<volume>64</volume>
<numero>1</numero>
<fpage>50</fpage>
<lpage>54</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S1646-28902023000100050&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S1646-28902023000100050&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S1646-28902023000100050&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Metastatic spread to the salivary glands is rare, occurring primarily from head and neck tumors to the parotid gland. So far, only one sublingual gland metastasis has been reported in the literature. We herein report the second case of metastasis to this gland occurring in a woman in her 50s, previously diagnosed with HER2-positive metaplastic breast carcinoma (MpBC) with chondroid differentiation, with lymph node and diffuse organ metastases. The sublingual lesion presented as a tumefaction on the floor of the mouth, causing masticatory discomfort. Histologically it was formed by epithelial cells with high-grade cytomorphological features with a large central area of chondroid differentiation. The case was clinically and pathologically challenging, given the rarity of the primary MpBC and the improbable secondary location. Alternative primary salivar gland tumors with chondroid differentiation were considered, but ultimately the clinical integration was crucial in establishing the diagnosis of MpBC metastasis to the sublingual gland.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo As metástases para as glândulas salivares são raras, ocorrendo sobretudo de neoplasias da cabeça e do pescoço para a glândula parótida. Até ao momento apenas uma metástase na glândula sublingual foi reportada na literatura. Neste trabalho apresentamos o segundo caso, que ocorreu numa mulher na casa dos 50 anos, anteriormente diagnosticada com carcinoma metaplásico da mama (MpBC) com diferenciação condroide, e com metástases ganglionares e orgânicas difusas. A lesão sublingual surgiu como uma tumefação no pavimento da boca que causava desconforto na mastigação. Histologicamente era formada por células epiteliais com características citomorfológicas de alto grau, com uma área central condroide. O caso foi desafiante dada a raridade do tumor primário e o local improvável de metastização. Considerámos tumores primários da glândula salivar com diferenciação condroide como diagnósticos alternativos, mas a integração clínica foi crucial para estabelecer o diagnóstico de metástase de MpBC para a glândula sublingual.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Breast carcinoma]]></kwd>
<kwd lng="en"><![CDATA[Metastasis]]></kwd>
<kwd lng="en"><![CDATA[Sublingual gland]]></kwd>
<kwd lng="pt"><![CDATA[Carcinoma da mama]]></kwd>
<kwd lng="pt"><![CDATA[Metástase]]></kwd>
<kwd lng="pt"><![CDATA[Glândula sublingual]]></kwd>
</kwd-group>
</article-meta>
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