<?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>0872-0169</journal-id>
<journal-title><![CDATA[Portuguese Journal of Nephrology & Hypertension]]></journal-title>
<abbrev-journal-title><![CDATA[Port J Nephrol Hypert]]></abbrev-journal-title>
<issn>0872-0169</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Nefrologia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0872-01692021000300196</article-id>
<article-id pub-id-type="doi">10.32932/pjnh.2021.10.147</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Hypertension as an atypical presentation of unilateral ureteral obstruction]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mantas]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Baptista]]></surname>
<given-names><![CDATA[Rute Baeta]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Raquel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrão]]></surname>
<given-names><![CDATA[Ana Paula]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital de Santarém Department of Pediatrics ]]></institution>
<addr-line><![CDATA[Santarém ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro Hospitalar Universitário de Lisboa Central Hospital Dona Estefânia Nephrology Unit]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>35</volume>
<numero>3</numero>
<fpage>196</fpage>
<lpage>202</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0872-01692021000300196&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0872-01692021000300196&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0872-01692021000300196&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Ureteral obstruction (ureteropelvic or ureterovesical junction obstruction) is frequently diagnosed during the workup investigation of na asymptomatic infant or child with upper urinary tract dilatation, commonly identified in a prenatal ultrasound. In older children, recurrent lumbar pain is a red flag for ureteral obstruction. Although less frequent, hypertension may be the initial and only manifestation of ureteral obstruction. The authors present two pediatric cases of unilateral ureteral obstruction with hypertension, in which the surgical treatment of the obstruction leads to blood pressure normalisation. In all pediatric age groups, a systematic investigation for secondary causes of hypertension is of paramount importance. In some cases, especially those of an obstructive nature, early surgical management can be curative, with normalization of blood pressure levels and prevention of renal injury.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Hypertension]]></kwd>
<kwd lng="en"><![CDATA[ureteral obstruction]]></kwd>
<kwd lng="en"><![CDATA[child.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mattoo]]></surname>
<given-names><![CDATA[TK]]></given-names>
</name>
</person-group>
<source><![CDATA[Epidemiology, risk factors, and etiology of hypertension in children and adolescents]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Waltham ]]></publisher-loc>
<publisher-name><![CDATA[UpToDate]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lurbe]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Agabiti&#8209;Rosei]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Cruickshank]]></surname>
<given-names><![CDATA[JK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[2016 European Society of Hypertension guidelines for the management of high blood pressure in children and adolescents]]></article-title>
<source><![CDATA[J Hypertens]]></source>
<year>2016</year>
<volume>34</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>1887&#8209;1920</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maldonado]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Fernandes]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An approach of hypertension prevalence in a sample of 5381 Portuguese children and adolescents. The AVELEIRA registry. &#8220;Hypertension in Children&#8221;]]></article-title>
<source><![CDATA[Blood Press]]></source>
<year>2011</year>
<volume>20</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>153&#8209;157</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Toocheck]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Guerrero]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tragedy of transition: hypertensive crisis in a young adult secondary to unilateral ureteropelvic junction obstruction following pyeloplasty as an adolescent]]></article-title>
<source><![CDATA[BMJ Case Rep]]></source>
<year>2018</year>
<volume>29</volume>
<page-range>2018</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kay]]></surname>
<given-names><![CDATA[JD]]></given-names>
</name>
<name>
<surname><![CDATA[Sinaiko]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
<name>
<surname><![CDATA[Daniels]]></surname>
<given-names><![CDATA[SR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pediatric hypertension]]></article-title>
<source><![CDATA[Am Heart J]]></source>
<year>2001</year>
<volume>142</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>422&#8209;432</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baskin]]></surname>
<given-names><![CDATA[LS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Overview of fetal hydronephrosis]]></article-title>
<source><![CDATA[UpToDate]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Waltham ]]></publisher-loc>
<publisher-name><![CDATA[UpToDate]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baskin]]></surname>
<given-names><![CDATA[LS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Postnatal management of fetal hydronephrosis]]></article-title>
<source><![CDATA[UpToDate]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Waltham ]]></publisher-loc>
<publisher-name><![CDATA[UpToDate]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baskin]]></surname>
<given-names><![CDATA[LS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Congenital ureteropelvic junction obstruction]]></article-title>
<source><![CDATA[UpToDate]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Waltham ]]></publisher-loc>
<publisher-name><![CDATA[UpToDate]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carlström]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hydronephrosis and risk of later development of hypertension]]></article-title>
<source><![CDATA[Acta Paediatr]]></source>
<year>2019</year>
<volume>108</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>50&#8209;57</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Al&#8209;Mashhadi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Häggman]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Läckgren]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Changes of arterial pressure following relief of obstruction in adults with hydronephrosis]]></article-title>
<source><![CDATA[Ups J Med Sci]]></source>
<year>2018</year>
<volume>123</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>216&#8208;224</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[de Waard]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Dik]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Lilien]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hypertension is an indication for surgery in children with ureteropelvic junction obstruction]]></article-title>
<source><![CDATA[J Urol]]></source>
<year>2008</year>
<volume>179</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1976&#8208;1979</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Al&#8209;Mashhadi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Checa]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Wahlin]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Changes in arterial pressure and markers of nitric oxide homeostasis and oxidative stress following surgical correction of hydronephrosis in children]]></article-title>
<source><![CDATA[Pediatr Nephrol]]></source>
<year>2018</year>
<volume>33</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>639&#8209;649</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Al&#8209;Mashhadi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Neveus]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Stenberg]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Surgical treatment reduces blood pressure in children with unilateral congenital hydronephrosis]]></article-title>
<source><![CDATA[J Pediatr Urol]]></source>
<year>2015</year>
<volume>11</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>91.e1&#8209;e6</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
