<?xml version="1.0" encoding="utf-8"?>
<TEI xmlns="http://www.tei-c.org/ns/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:hal="http://hal.archives-ouvertes.fr/" xmlns:gml="http://www.opengis.net/gml/3.3/" xmlns:gmlce="http://www.opengis.net/gml/3.3/ce" version="1.1" xsi:schemaLocation="http://www.tei-c.org/ns/1.0 http://api.archives-ouvertes.fr/documents/aofr-sword.xsd">
  <teiHeader>
    <fileDesc>
      <titleStmt>
        <title>HAL TEI export of hal-05245790</title>
      </titleStmt>
      <publicationStmt>
        <distributor>CCSD</distributor>
        <availability status="restricted">
          <licence target="https://creativecommons.org/publicdomain/zero/1.0/">CC0 1.0 - Universal</licence>
        </availability>
        <date when="2026-05-02T02:34:55+02:00"/>
      </publicationStmt>
      <sourceDesc>
        <p part="N">HAL API Platform</p>
      </sourceDesc>
    </fileDesc>
  </teiHeader>
  <text>
    <body>
      <listBibl>
        <biblFull>
          <titleStmt>
            <title xml:lang="en">Catastrophic Wear-induced Pseudotumor Formation 20 Years Post-total Hip Arthroplasty: A Rare Complication of Non-Metal-on-Metal (MoM) THR</title>
            <author role="aut">
              <persName>
                <forename type="first">Ifeanyi</forename>
                <surname>Agwulonu</surname>
              </persName>
              <idno type="halauthorid">3475325-0</idno>
              <affiliation ref="#struct-1535889"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Olusunmade</forename>
                <surname>Opeyemi</surname>
              </persName>
              <idno type="halauthorid">3760189-0</idno>
              <affiliation ref="#struct-1535890"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Hakeem</forename>
                <surname>Badmus</surname>
              </persName>
              <idno type="halauthorid">3760190-0</idno>
              <affiliation ref="#struct-1535891"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Idowu</forename>
                <surname>Oluwseyi</surname>
              </persName>
              <idno type="halauthorid">3760191-0</idno>
              <affiliation ref="#struct-1535890"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Osuala</forename>
                <surname>Chinonye</surname>
              </persName>
              <idno type="halauthorid">3760192-0</idno>
              <affiliation ref="#struct-1535893"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Obong</forename>
                <surname>Udemeobong</surname>
              </persName>
              <idno type="halauthorid">3699739-0</idno>
              <affiliation ref="#struct-1535889"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Moses</forename>
                <surname>Oyewumi</surname>
              </persName>
              <idno type="halauthorid">3760193-0</idno>
              <affiliation ref="#struct-1535889"/>
            </author>
            <editor role="depositor">
              <persName>
                <forename>Surge</forename>
                <surname>System</surname>
              </persName>
              <email type="md5">b1ec6cec73b9d9c38909f2a80222e99a</email>
              <email type="domain">gmail.com</email>
            </editor>
          </titleStmt>
          <editionStmt>
            <edition n="v1" type="current">
              <date type="whenSubmitted">2025-09-09 07:39:25</date>
              <date type="whenModified">2025-09-09 07:39:25</date>
              <date type="whenReleased">2025-09-09 07:39:25</date>
              <date type="whenProduced">2025-09-06</date>
            </edition>
            <respStmt>
              <resp>contributor</resp>
              <name key="1707521">
                <persName>
                  <forename>Surge</forename>
                  <surname>System</surname>
                </persName>
                <email type="md5">b1ec6cec73b9d9c38909f2a80222e99a</email>
                <email type="domain">gmail.com</email>
              </name>
            </respStmt>
          </editionStmt>
          <publicationStmt>
            <distributor>CCSD</distributor>
            <idno type="halId">hal-05245790</idno>
            <idno type="halUri">https://hal.science/hal-05245790</idno>
            <idno type="halBibtex">agwulonu:hal-05245790</idno>
            <idno type="halRefHtml">&lt;i&gt;Asian Journal of Case Reports in Medicine and Health&lt;/i&gt;, 2025, 8 (1), pp.300-308</idno>
            <idno type="halRef">Asian Journal of Case Reports in Medicine and Health, 2025, 8 (1), pp.300-308</idno>
            <availability status="restricted"/>
          </publicationStmt>
          <seriesStmt/>
          <notesStmt>
            <note type="audience" n="2">International</note>
            <note type="popular" n="0">No</note>
            <note type="peer" n="1">Yes</note>
          </notesStmt>
          <sourceDesc>
            <biblStruct>
              <analytic>
                <title xml:lang="en">Catastrophic Wear-induced Pseudotumor Formation 20 Years Post-total Hip Arthroplasty: A Rare Complication of Non-Metal-on-Metal (MoM) THR</title>
                <author role="aut">
                  <persName>
                    <forename type="first">Ifeanyi</forename>
                    <surname>Agwulonu</surname>
                  </persName>
                  <idno type="halauthorid">3475325-0</idno>
                  <affiliation ref="#struct-1535889"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Olusunmade</forename>
                    <surname>Opeyemi</surname>
                  </persName>
                  <idno type="halauthorid">3760189-0</idno>
                  <affiliation ref="#struct-1535890"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Hakeem</forename>
                    <surname>Badmus</surname>
                  </persName>
                  <idno type="halauthorid">3760190-0</idno>
                  <affiliation ref="#struct-1535891"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Idowu</forename>
                    <surname>Oluwseyi</surname>
                  </persName>
                  <idno type="halauthorid">3760191-0</idno>
                  <affiliation ref="#struct-1535890"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Osuala</forename>
                    <surname>Chinonye</surname>
                  </persName>
                  <idno type="halauthorid">3760192-0</idno>
                  <affiliation ref="#struct-1535893"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Obong</forename>
                    <surname>Udemeobong</surname>
                  </persName>
                  <idno type="halauthorid">3699739-0</idno>
                  <affiliation ref="#struct-1535889"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Moses</forename>
                    <surname>Oyewumi</surname>
                  </persName>
                  <idno type="halauthorid">3760193-0</idno>
                  <affiliation ref="#struct-1535889"/>
                </author>
              </analytic>
              <monogr>
                <idno type="halJournalId" status="INCOMING">577956</idno>
                <title level="j">Asian Journal of Case Reports in Medicine and Health</title>
                <imprint>
                  <publisher>OA Academic Press</publisher>
                  <biblScope unit="volume">8</biblScope>
                  <biblScope unit="issue">1</biblScope>
                  <biblScope unit="pp">300-308</biblScope>
                  <date type="datePub">2025-09-06</date>
                </imprint>
              </monogr>
            </biblStruct>
          </sourceDesc>
          <profileDesc>
            <langUsage>
              <language ident="en">English</language>
            </langUsage>
            <textClass>
              <classCode scheme="halDomain" n="info.info-im">Computer Science [cs]/Medical Imaging</classCode>
              <classCode scheme="halTypology" n="ART">Journal articles</classCode>
              <classCode scheme="halOldTypology" n="ART">Journal articles</classCode>
              <classCode scheme="halTreeTypology" n="ART">Journal articles</classCode>
            </textClass>
            <abstract xml:lang="en">
              <p>Pseudotumors following adverse reactions to metal debris are most commonly associated with metal-on-metal (MoM) total hip replacements (THRs). However, their occurrence in non-metal-on-metal (non-MoM) THRs, such as metal-on-polyethylene (MoP), is rare. We present a case of pseudotumor formation secondary to catastrophic polyethylene liner wear in a MoP THR two decades after the index procedure. A 68-year-old male presented with progressive pain, stiffness, and swelling around the left hip 20 years after receiving a MoP total hip arthroplasty. Clinical evaluation revealed a firm, non-fluctuant periprosthetic mass. Radiographs demonstrated eccentric femoral head position with a large expansile osteolytic lesion. MRI revealed a heterogeneous soft tissue mass with metal artifact. Serum cobalt and chromium levels were elevated. Aspiration yielded sterile dark fluid, and histopathology showed lymphoplasmacytic infiltrates consistent with an ALVAL-type response. Intraoperatively, complete polyethylene liner wear was noted with metal-on-metal contact between the cobalt-chromium head and titanium shell, generating extensive metallosis and pseudotumor formation. The patient underwent a two-stage revision, including pseudotumor excision and distal femoral replacement. Pseudotumors can develop in non-MoM THRs due to catastrophic polyethylene wear and secondary metallosis. Long-term follow-up is essential for early detection of wear-related complications, even in conventionally inert bearing surfaces. Surgeons should maintain vigilance for late-onset masses in THA patients, regardless of implant type.</p>
            </abstract>
          </profileDesc>
        </biblFull>
      </listBibl>
    </body>
    <back>
      <listOrg type="structures">
        <org type="institution" xml:id="struct-1535889" status="INCOMING">
          <orgName>Department of Surgery, Babcock University Teaching Hospital, Ilishan Remo, Nigeria.</orgName>
          <desc>
            <address>
              <country key="NG"/>
            </address>
          </desc>
        </org>
        <org type="institution" xml:id="struct-1535890" status="INCOMING">
          <orgName>Department of Orthopedics, National Orthopaedic Hospital Igbobi, Nigeria.</orgName>
          <desc>
            <address>
              <country key="NG"/>
            </address>
          </desc>
        </org>
        <org type="institution" xml:id="struct-1535891" status="INCOMING">
          <orgName>Hospital for Trauma and Surgery, Lekki, Nigeria.</orgName>
          <desc>
            <address>
              <country key="NG"/>
            </address>
          </desc>
        </org>
        <org type="institution" xml:id="struct-1535893" status="INCOMING">
          <orgName>Department of Orthopedics, Ebonyi State Teaching Hospital, Abakaliki, Nigeria.</orgName>
          <desc>
            <address>
              <country key="NG"/>
            </address>
          </desc>
        </org>
      </listOrg>
    </back>
  </text>
</TEI>