<?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>S1646-28902021000100029</article-id>
<article-id pub-id-type="doi">10.24873/j.rpemd.2021.03.825</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Lichen planus and its therapeutic management: a retrospective study]]></article-title>
<article-title xml:lang="pt"><![CDATA[Líquen Plano e abordagem terapêutica: um estudo retrospetivo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rebelo]]></surname>
<given-names><![CDATA[Mariana Rodrigues]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[Cristina Palmela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Rui Sousa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soares-de-Almeida]]></surname>
<given-names><![CDATA[Luís]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Filipe]]></surname>
<given-names><![CDATA[Paulo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade de Lisboa Faculdade de Medicina Dentária ]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade de Lisboa Centro de Estatística e Aplicações ]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico de Leiria Escola Superior de Tecnologia e Gestão ]]></institution>
<addr-line><![CDATA[Leiria ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade de Lisboa Faculdade de Medicina ]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>62</volume>
<numero>1</numero>
<fpage>29</fpage>
<lpage>34</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S1646-28902021000100029&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S1646-28902021000100029&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S1646-28902021000100029&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objectives:  To study the epidemiological distribution of the disease lichen planus and its therapeutic management.  Methods:  A total of 174 patients with a lichen planus diagnosis between 2008 and 2017 at a Portuguese public hospital were included in this retrospective study. The following data were collected from clinical records: gender, age, topographic distribution of lesions, prescribed therapy (active substance, route, and scheme of administration), mean duration of illness, and episodes of cure and relapse. Statistical analysis was performed using IBMR SPSSR Statistics software, version 25.  Results:  In this population, lichen planus affected both genders with the same probability (p=0.820), and was more prevalent in the 4th-5th decades of age. The lesions appeared in the skin (75.9% of the patients), mucous membranes (5.2%), or both (19.0%). The most prescribed drugs were corticosteroids, followed by antihistamines and immunosuppressants. Topical corticosteroids were the most common ones, namely clobetasol propionate (37.4%). Within the systemic corticosteroids, prednisolone was the most prescribed drug (12.3%). The average duration of lesions and symptoms was approximately 6.5 months. For the relapsing population (12%), the mean period of symptoms&#8217; remission was 513 days.  Conclusions:  The epidemiological parameters of lichen planus in these Portuguese patients bear similarities with other described populations. No evidence-based therapeutic has proven to be effective for lichen planus treatment, but topical corticosteroids continue to be the firstline therapy for this pathology.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Objetivos:  Caracterizar epidemiologicamente a patologia Líquen Plano e sua abordagem terapêutica.  Métodos:  Neste estudo retrospetivo, foram incluídos 174 pacientes, de um hospital público português, com diagnóstico de Líquen Plano entre os anos 2008 e 2017. Os registos médicos permitiram a recolha de informação relativa a género, idade, distribuição topográfica das lesões de Líquen Plano, terapêutica prescrita (princípio ativo, via de administração e esquema terapêutico), duração média da doença, episódios de cura e recidiva. A análise estatística foi realizada com recurso ao software IBM® SPSS® Statistics, versão 25.  Resultados:  Nesta população, a doença afetou ambos os géneros com a mesma probabilidade (p=0,820), no entanto, com maior prevalência na 4.ª e 5.ª décadas de idade. As lesões de Líquen Plano manifestaram-se na pele (em 75,9% dos doentes), nas mucosas (5,2%), ou em ambos (19,0%). Os fármacos mais prescritos foram os corticosteróides, seguidos dos anti-histamínicos e dos imunossupressores. Os corticosteróides tópicos foram os mais comummente administrados, nomeadamente o Propionato de Clobetasol (37,4%). Dentro dos corticosteróides sistémicos, a Prednisolona foi o fármaco mais utilizado (12,3%). A duração média das lesões e sintomas foi de aproximadamente 6,5 meses. Para a população que recidivou (12%), o período médio de remissão dos sintomas foi de 513 dias.  Conclusões:  Os parâmetros epidemiológicos desta amostra de pacientes portugueses com Líquen Plano partilham semelhanças com outras populações descritas. Nenhuma terapêutica baseada em evidência provou ser eficaz para o tratamento do Líquen Plano. No entanto, os corticosteróides tópicos continuam a apresentar-se como a solução terapêutica de primeira linha para esta patologia.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Corticosteroids]]></kwd>
<kwd lng="en"><![CDATA[Dermatology]]></kwd>
<kwd lng="en"><![CDATA[Epidemiology]]></kwd>
<kwd lng="en"><![CDATA[Lichen planus]]></kwd>
<kwd lng="en"><![CDATA[Therapeutics]]></kwd>
<kwd lng="pt"><![CDATA[Corticoesteróides]]></kwd>
<kwd lng="pt"><![CDATA[Dermatologia]]></kwd>
<kwd lng="pt"><![CDATA[Epidemiologia]]></kwd>
<kwd lng="pt"><![CDATA[Líquen plano]]></kwd>
<kwd lng="pt"><![CDATA[Terapêutica]]></kwd>
</kwd-group>
</article-meta>
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