<?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>1870-7203</journal-id>
<journal-title><![CDATA[Acta médica Grupo Ángeles]]></journal-title>
<abbrev-journal-title><![CDATA[Acta méd. Grupo Ángeles]]></abbrev-journal-title>
<issn>1870-7203</issn>
<publisher>
<publisher-name><![CDATA[Grupo Ángeles, Servicios de Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-72032026000300304</article-id>
<article-id pub-id-type="doi">10.35366/123160</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Osteoartritis femoropatelar aislada]]></article-title>
<article-title xml:lang="en"><![CDATA[Isolated patellofemoral osteoarthritis]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez Gasca]]></surname>
<given-names><![CDATA[Luis Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez Carrillo]]></surname>
<given-names><![CDATA[Luis Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Angeles León División de Cirugía ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Guanajuato  Facultad de Medicina de León]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2026</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2026</year>
</pub-date>
<volume>24</volume>
<numero>3</numero>
<fpage>304</fpage>
<lpage>305</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-72032026000300304&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-72032026000300304&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-72032026000300304&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Isolated patellofemoral osteoarthritis (PFO) is uncommon, accounting for only 4%; associated with other compartments, its frequency reaches 49%. Its pathophysiology is caused by patellar compression when flexing the knee; the reaction force corresponds to the vectorial sum of the forces of the quadriceps and the patellar ligament, which increases with any increase in knee flexion under load, reaching three times the body weight when ascending and descending stairs and seven to eight times when squatting. Partial arthroplasty of the PF joint is indicated in isolated disabling PFO, without response to conservative treatment, absence of tibiofemoral OA and normal tibiofemoral alignment.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[patellofemoral]]></kwd>
<kwd lng="en"><![CDATA[osteoarthritis]]></kwd>
<kwd lng="en"><![CDATA[partial arthroplasty]]></kwd>
</kwd-group>
</article-meta>
</front>
</article>
