<?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>2306-4102</journal-id>
<journal-title><![CDATA[Acta ortopédica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta ortop. mex]]></abbrev-journal-title>
<issn>2306-4102</issn>
<publisher>
<publisher-name><![CDATA[Colegio Mexicano de Ortopedia y Traumatología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2306-41022025000100038</article-id>
<article-id pub-id-type="doi">10.35366/118851</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Artroplastía total modular de cadera por fractura en terreno patológico secundaria a displasia fibrosa. Presentación de caso clínico y revisión de literatura]]></article-title>
<article-title xml:lang="en"><![CDATA[Total modular hip arthroplasty for fracture in pathological terrain secondary to fibrous dysplasia. Presentation of a clinical case and literature review]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zárate-de la Torre]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bolaños-Cacho-Casillas]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Clara-Altamirano]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarrete-Álvarez]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Español de México Servicio de Ortopedia y Traumatología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Español de México  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Español de México  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2025</year>
</pub-date>
<volume>39</volume>
<numero>1</numero>
<fpage>38</fpage>
<lpage>43</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2306-41022025000100038&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2306-41022025000100038&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2306-41022025000100038&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La displasia fibrosa (DF) es una condición tumoral benigna en la que el hueso normal es reemplazado por hueso laminar fibro-óseo estructuralmente deficiente. Representa aproximadamente 5-7% de los tumores benignos óseos y ocurre en dos presentaciones: monostótica, que es la más frecuente, y poliostótica. El fémur proximal es una de las localizaciones más comunes de tumores benignos, incluida la DF. Las fracturas en terreno patológico son en muchas ocasiones el primer síntoma. En el contexto de fractura de fémur proximal con tumoración benigna, las indicaciones para llevar a cabo una resección femoral total son: múltiples lesiones en fémur o tumores diafisarios primarios, lesiones que se extienden por proximal y distal hasta sobrepasar la zona de unión epimetafisaria y aquellos que no permiten preservar la articulación de manera adecuada. Actualmente se considera como una buena opción terapéutica la resección femoral proximal o total para llevar a cabo un reemplazo endoprotésico mediante sistemas megaprotésicos modulares. Presentamos el caso de un paciente masculino de 27 años, quien acude a servicio de urgencias con una fractura basicervical de fémur derecho en terreno patológico Garden II Pauwells III AO 31B2.3r, posterior a presentar mecanismo de lesión de baja energía caracterizado por carga axial con componente rotacional de la cadera derecha. Dicho paciente cuenta con el antecedente de resección intralesional, aplicación de injerto óseo y fijación profiláctica mediante material de osteosíntesis no especificado en región pertrocantérea 20 años atrás; la toma de biopsia más tarde arrojaría DF; un año después se llevó a cabo retiro del material de osteosíntesis. Debido a las características de la fractura y como método terapéutico definitivo y curativo, se decide llevar a cabo resección amplia de fémur proximal y artroplastía total de cadera con prótesis modular con colocación de cerclaje, así como toma de biopsia escisional que más tarde corroboraría que se trataba de la misma DF tratada en la infancia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Fibrous dysplasia (FD) is a benign tumor condition in which normal bone is replaced by structurally deficient fibrous lamellar bone. It represents approximately 5-7% of benign bone tumors and occurs in two presentations: monostotic, which is the most common, and polyostotic. The proximal femur is one of the most common locations for benign tumors, including FD. Fractures in pathological terrain are often the first symptom. In the context of a proximal femur fracture with a benign tumor, the indications for carrying out a total femoral resection are: multiple lesions in the femur or primary diaphyseal tumors, lesions that extend proximally and distally to exceed the epimetaphyseal junction area, and those that do not allow the joint to be adequately preserved. Currently, proximal or total femoral resection is considered a good therapeutic option to carry out endoprosthetic replacement using modular megaprosthetic systems. We present the case of a 27-year-old male patient, who came to the emergency department with a basicervical fracture of the right femur in Garden II Pauwells III AO 31B2.3r pathological terrain, after presenting a low-energy injury mechanism characterized by axial loading with rotational component of the right hip. This patient has a history of intralesional resection, application of bone graft and prophylactic fixation using unspecified osteosynthesis material in the pertrochanteric region 20 years ago; the biopsy would later show DF; the osteosynthesis material was subsequently removed one year later. Due to the characteristics of the fracture and as a definitive and curative therapeutic method, it was decided to carry out wide resection of the proximal femur and total hip arthroplasty with a modular prosthesis with cerclage placement, as well as taking an excisional biopsy that would later corroborate that it was the same FD treated in childhood.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[displasia fibrosa]]></kwd>
<kwd lng="es"><![CDATA[artroplastía total con prótesis modular]]></kwd>
<kwd lng="es"><![CDATA[reemplazo articular]]></kwd>
<kwd lng="es"><![CDATA[patología]]></kwd>
<kwd lng="es"><![CDATA[biopsia escisional]]></kwd>
<kwd lng="en"><![CDATA[fibrous dysplasia]]></kwd>
<kwd lng="en"><![CDATA[total hip replacement with modular prosthesis]]></kwd>
<kwd lng="en"><![CDATA[joint replacement]]></kwd>
<kwd lng="en"><![CDATA[pathology]]></kwd>
<kwd lng="en"><![CDATA[excisional biopsy]]></kwd>
</kwd-group>
</article-meta>
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