<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-04-14T03:16:37Z</responseDate><request verb="GetRecord" identifier="oai:www.recercat.cat:11351/13875" metadataPrefix="qdc">https://recercat.cat/oai/request</request><GetRecord><record><header><identifier>oai:recercat.cat:11351/13875</identifier><datestamp>2025-10-24T10:23:21Z</datestamp><setSpec>com_2072_378070</setSpec><setSpec>com_2072_378040</setSpec><setSpec>col_2072_378092</setSpec></header><metadata><qdc:qualifieddc xmlns:qdc="http://dspace.org/qualifieddc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://purl.org/dc/elements/1.1/ http://dublincore.org/schemas/xmls/qdc/2006/01/06/dc.xsd http://purl.org/dc/terms/ http://dublincore.org/schemas/xmls/qdc/2006/01/06/dcterms.xsd http://dspace.org/qualifieddc/ http://www.ukoln.ac.uk/metadata/dcmi/xmlschema/qualifieddc.xsd">
   <dc:title>Recurrent Pneumothorax in a Pediatric Patient with Crohn’s Disease Receiving Ustekinumab Treatment: Case Report</dc:title>
   <dc:creator>Freixas Bermejo, Marta</dc:creator>
   <dc:creator>Riera Soler, Luis</dc:creator>
   <dc:creator>García Martínez, Laura</dc:creator>
   <dc:creator>Segarra, Oscar</dc:creator>
   <dc:subject>Crohn, Malaltia de - Tractament</dc:subject>
   <dc:subject>Anticossos monoclonals - Ús terapèutic - Efectes secundaris</dc:subject>
   <dc:subject>Pneumotòrax</dc:subject>
   <dc:subject>DISEASES::Respiratory Tract Diseases::Pleural Diseases::Pneumothorax</dc:subject>
   <dc:subject>DISEASES::Digestive System Diseases::Gastrointestinal Diseases::Gastroenteritis::Inflammatory Bowel Diseases::Crohn Disease</dc:subject>
   <dc:subject>Other subheadings::Other subheadings::Other subheadings::/drug therapy</dc:subject>
   <dc:subject>CHEMICALS AND DRUGS::Amino Acids, Peptides, and Proteins::Proteins::Blood Proteins::Immunoproteins::Immunoglobulins::Antibodies::Antibodies, Monoclonal</dc:subject>
   <dc:subject>Other subheadings::Other subheadings::Other subheadings::/adverse effects</dc:subject>
   <dc:subject>ENFERMEDADES::enfermedades respiratorias::enfermedades pleurales::neumotórax</dc:subject>
   <dc:subject>ENFERMEDADES::enfermedades del sistema digestivo::enfermedades gastrointestinales::gastroenteritis::enfermedad inflamatoria intestinal::enfermedad de Crohn</dc:subject>
   <dc:subject>Otros calificadores::Otros calificadores::Otros calificadores::/farmacoterapia</dc:subject>
   <dc:subject>COMPUESTOS QUÍMICOS Y DROGAS::aminoácidos, péptidos y proteínas::proteínas::proteínas sanguíneas::inmunoproteínas::inmunoglobulinas::anticuerpos::anticuerpos monoclonales</dc:subject>
   <dc:subject>Otros calificadores::Otros calificadores::Otros calificadores::/efectos adversos</dc:subject>
   <dcterms:abstract>Crohn disease; Inflammatory bowel disease; Pneumothorax</dcterms:abstract>
   <dcterms:abstract>Malaltia de Crohn; Malaltia inflamatòria intestinal; Pneumotòrax</dcterms:abstract>
   <dcterms:abstract>Enfermedad de Crohn; Enfermedad inflamatoria intestinal; Neumotórax</dcterms:abstract>
   <dcterms:abstract>Introduction: We present the case of a patient with Crohn's disease who experienced recurrent pneumothorax after starting treatment with ustekinumab.&#xd;
Case presentation: A patient with Crohn's disease started an induction regimen with intravenous ustekinumab, and 2 months later he presented a left-sided pneumothorax. It had an atypical evolution that required surgical management. The medication was withdrawn and the pneumothorax resolved completely. One year later, he had a new flare-up of Crohn's disease and ustekinumab therapy was restarted, presenting a new episode of pneumothorax.&#xd;
Conclusion: To our knowledge, this is the first report of recurrent pneumothorax following two separate attempts to initiate ustekinumab.</dcterms:abstract>
   <dcterms:dateAccepted>2025-10-24T10:23:21Z</dcterms:dateAccepted>
   <dcterms:available>2025-10-24T10:23:21Z</dcterms:available>
   <dcterms:created>2025-10-24T10:23:21Z</dcterms:created>
   <dcterms:issued>2025-10-16T07:23:15Z</dcterms:issued>
   <dcterms:issued>2025-10-16T07:23:15Z</dcterms:issued>
   <dcterms:issued>2025</dcterms:issued>
   <dc:type>info:eu-repo/semantics/article</dc:type>
   <dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
   <dc:identifier>http://hdl.handle.net/11351/13875</dc:identifier>
   <dc:relation>Case Reports in Gastroenterology;19(1)</dc:relation>
   <dc:relation>https://doi.org/10.1159/000543991</dc:relation>
   <dc:rights>Attribution-NonCommercial 4.0 International</dc:rights>
   <dc:rights>http://creativecommons.org/licenses/by-nc/4.0/</dc:rights>
   <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
   <dc:publisher>Karger</dc:publisher>
   <dc:source>Scientia</dc:source>
</qdc:qualifieddc></metadata></record></GetRecord></OAI-PMH>