<?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>2182-2395</journal-id>
<journal-title><![CDATA[Revista da Sociedade Portuguesa de Dermatologia e Venereologia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Soc Port Dermatol Venereol]]></abbrev-journal-title>
<issn>2182-2395</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Dermatologia e Venereologia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2182-23952020000300062</article-id>
<article-id pub-id-type="doi">10.29021/spdv.78.3.1199</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Syphilitic Balanitis of Follmann: Laboratory Pitfalls]]></article-title>
<article-title xml:lang="pt"><![CDATA[Balanite Sifilítica de Follmann: Armadilhas de Laboratório]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almeida]]></surname>
<given-names><![CDATA[Filipa Tavares]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Azevedo]]></surname>
<given-names><![CDATA[Filomena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lisboa]]></surname>
<given-names><![CDATA[Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital de Braga Department of Dermatology and Venereology ]]></institution>
<addr-line><![CDATA[Braga ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro Hospitalar Universitário São João Department of Dermatology and Venereology ]]></institution>
<addr-line><![CDATA[Porto ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,University of Porto Faculty of Medicine Division of Microbiology, Department of Pathology]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>78</volume>
<numero>3</numero>
<fpage>62</fpage>
<lpage>65</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S2182-23952020000300062&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S2182-23952020000300062&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S2182-23952020000300062&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT We report a case of early syphilis, presenting as balanitis and papular syphilides in an HIV-infected patient, with a previous history of syphilis infection, which demonstrated a false negative VDRL testing due to a prozone phenomenon. This false negative response results from overwhelming antibody titers, which interfere with the proper formation of the antigen-antibody lattice network, necessary to visualize a positive flocculation test.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO Descreve-se um caso de sífilis recente, num doente com infeção VIH e história prévia de sífilis, caracterizado por balanite e sifílides papulares, e um resultado falso negativo para o teste VDRL devido ao fenómeno de prozona. Este resultado falso negativo decorre de títulos muito elevados de anticorpos, que interferem na formação de complexos antigénio-anticorpo, necessários para visualizar um teste de floculação positivo.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Balanite/diagnóstico]]></kwd>
<kwd lng="pt"><![CDATA[Sífilis/diagnóstico]]></kwd>
<kwd lng="en"><![CDATA[Keywords: Balanitis/diagnosis]]></kwd>
<kwd lng="en"><![CDATA[Syphilis/diagnosis.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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