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<title>My RSS Feed</title><link>https://www.michel-lewin.be/index.html</link><description>Hot News&#x21;</description><dc:language>en</dc:language><language>en</language><dc:date>2026-05-11T10:27:57+02:00</dc:date><admin:generatorAgent rdf:resource="http://www.realmacsoftware.com/" />
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<lastBuildDate>Sat, 6 Dec 2025 06:29:27 +0100</lastBuildDate><item><title>atteinte pulmonaire</title><dc:subject>Wegener (GPA)</dc:subject><dc:date>2026-05-11T10:27:57+02:00</dc:date><link>https://www.michel-lewin.be/styled-12/blog-104/files/980130675061f048f4c27bbed63b7dda-2.html#unique-entry-id-2</link><guid isPermaLink="true">https://www.michel-lewin.be/styled-12/blog-104/files/980130675061f048f4c27bbed63b7dda-2.html#unique-entry-id-2</guid><content:encoded><![CDATA[<span style="font-size:18px; color:#2E2E2E;">Granulomatose avec polyangiite (GPA): (anciennement Wegener) vascularite granulomateuse n&eacute;crosante non cas&eacute;euse multisyst&eacute;mique affectant les art&egrave;res, les capillaires et les veines de petite &agrave; moyenne taille.<br />95 % avec atteinte pulmonaire</span><span style="font-size:18px; color:#2E2E2E;"><br /><br /></span><span style="font-size:18px; color:#325489;">Il y a aussi<br /></span><span style="font-size:18px; color:#325489;">Granulomatose avec polyangiite : manifestations r&eacute;nales</span><span style="font-size:18px; color:#2E2E2E;"><br /></span><span style="font-size:18px; color:#325489;">Granulomatose avec polyangiite : manifestations des voies respiratoires sup&eacute;rieures</span><span style="font-size:18px; color:#2E2E2E;"><br /></span><span style="font-size:18px; color:#325489;">Granulomatose avec polyangiite : manifestations du SNC</span><span style="font-size:18px; color:#2E2E2E;"><br /></span><span style="font-size:18px; color:#325489;">Granulomatose avec polyangiite : manifestations orbitales<br /></span><span style="font-size:18px; color:#2E2E2E;"><br /></span><span style="font-size:18px; color:#512B89;">Pr&eacute;sentation clinique</span><span style="font-size:18px; color:#512B89;"><br /></span><span style="font-size:18px; color:#325489;">H&eacute;moptysie<br />T</span><span style="font-size:18px; color:#2E2E2E;">oux</span><span style="font-size:18px; color:#2E2E2E;"><br /></span><span style="font-size:18px; color:#512B89;">Caract&eacute;ristiques radiographiques</span><span style="font-size:18px; color:#2E2E2E;"><br /></span><ol class="arabic-numbers"><li><span style="font-size:18px; color:#2E2E2E;">nodules +/- cavitation (50%): n&deg;1</span></li><li><span style="font-size:18px; color:#325489;">H&eacute;morragie pulmonaire </span><span style="font-size:18px; color:#2E2E2E;">: autour des nodules ou dominante</span></li><li><span style="font-size:18px; color:#636363;">Motif r&eacute;ticulonodulaire </span><span style="font-size:18px; color:#2E2E2E;">basal: asymptomatiques</span></li><li><span style="font-size:18px; color:#2E2E2E;">Consolidation p&eacute;riph&eacute;rique en forme de coin +/- cavitation</span></li><li><span style="font-size:18px; color:#2E2E2E;">E</span><span style="font-size:18px; color:#325489;">panchements pleuraux </span><span style="font-size:18px; color:#2E2E2E;">(10 &agrave; 25 %) par atteinte cardiaque ou r&eacute;nale.</span></li><li><span style="font-size:18px; color:#2E2E2E;">E</span><span style="font-size:18px; color:#2E2E2E;">paississement de la trach&eacute;e et des voies respiratoires sup&eacute;rieures </span></li></ol><span style="font-size:18px; color:#512B89;">CT</span><span style="font-size:18px; color:#512B89;"><br /></span><ul class="disc"><li><span style="font-size:18px; color:#2E2E2E;">1</span><span style="font-size:18px; color:#2E2E2E;">. </span><span style="font-size:18px; color:#2E2E2E;">Nodules ou masses : </span></li><ul class="circle"><li><span style="font-size:18px; color:#2E2E2E;">~2-4 cm</span></li><li><span style="font-size:18px; color:#2E2E2E;">multiple 75%</span></li><li><span style="font-size:18px; color:#2E2E2E;">pas de pr&eacute;dilection zonale</span></li><li><span style="font-size:18px; color:#2E2E2E;">Marge irr&eacute;guli&egrave;re</span></li><li><span style="font-size:18px; color:#2E2E2E;">Cavitation ~40 &agrave; 50 %</span></li><li><span style="font-size:18px; color:#2E2E2E;">peut avoir une distribution p&eacute;ribronchovasculaire ou sous-pleurale</span></li></ul></ul><span style="font-size:18px; color:#2E2E2E;"><br /></span><ul class="circle"><li><span style="font-size:18px; color:#2E2E2E;">2</span><span style="font-size:18px; color:#2E2E2E;">. </span><span style="font-size:18px; color:#2E2E2E;">Micronodules : centrilobulaire en bourgeons (10 %)</span></li><li><span style="font-size:18px; color:#2E2E2E;">3</span><span style="font-size:18px; color:#2E2E2E;">. C</span><span style="font-size:18px; color:#2E2E2E;">onsolidation de l'espace a&eacute;rien</span></li><li><span style="font-size:18px; color:#2E2E2E;">Opacit&eacute;s p&eacute;riph&eacute;riques en forme de coin (dues &agrave; des infarctus pulmonaires)14</span></li><li><span style="font-size:18px; color:#2E2E2E;">Focal</span></li><li><span style="font-size:18px; color:#2E2E2E;">P&eacute;ribronchique</span></li><li><span style="font-size:18px; color:#2E2E2E;">Les opacit&eacute;s interstitielles/alv&eacute;olaires diffuses sont une manifestation plus fr&eacute;quente chez les enfants 2</span></li></ul><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/bronchiectasis?lang=us">bronchiectasie </a></span><span style="font-size:18px; color:#2E2E2E;">l&eacute;g&egrave;re</span></li><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/ground-glass-opacification-3?lang=us">changements de verre maill&eacute;</a></span></li><ul class="circle"><li><span style="font-size:18px; color:#2E2E2E;">Souvent &agrave; la suite d'h&eacute;morragies</span></li><li><span style="font-size:18px; color:#2E2E2E;">peut se rapporter &agrave; des nodules ou &agrave; des r&eacute;gions de consolidation</span></li><li><span style="font-size:18px; color:#2E2E2E;">peut &ecirc;tre la principale anomalie</span></li></ul><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/halo-sign-chest-3?lang=us">signe de halo</a></span></li><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/atoll-sign-lungs?lang=us">signe de halo invers&eacute;</a></span></li><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/feeding-vessel-sign?lang=us">panneau du r&eacute;cipient d'alimentation</a></span></li><li><span style="font-size:18px; color:#2E2E2E;">At&eacute;lectasie focale des st&eacute;noses des voies respiratoires</span></li><li><span style="font-size:18px; color:#2E2E2E;">&Eacute;paississement de la paroi trach&eacute;obronchique</span></li><ul class="circle"><li><span style="font-size:18px; color:#2E2E2E;">circonf&eacute;rentiel, peut &ecirc;tre lisse ou nodulaire</span></li><li><span style="font-size:18px; color:#2E2E2E;">La paroi post&eacute;rieure de la trach&eacute;e est typiquement impliqu&eacute;e sans calcification</span></li></ul><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/pleural-effusion?lang=us">&Eacute;panchement pleural</a></span></li><li><span style="font-size:18px; color:#636363;"><a href="https://radiopaedia.org/articles/missing?article%5Btitle%5D=chronic-fibrinous-pleuritis&lang=us">La pleur&eacute;sie fibrineuse </a></span><span style="font-size:18px; color:#2E2E2E;">aigu&euml; ou </span><span style="font-size:18px; color:#636363;"><a href="https://radiopaedia.org/articles/missing?article%5Btitle%5D=chronic-fibrinous-pleuritis&lang=us">chronique </a></span><span style="font-size:18px; color:#2E2E2E;">non sp&eacute;cifique peut rarement &ecirc;tre observ&eacute;e &agrave; c&ocirc;t&eacute; de l&eacute;sions inflammatoires nodulaires 8</span></li><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/mediastinal-lymph-node-enlargement?lang=us">Lymphad&eacute;nopathie </a></span><span style="font-size:18px; color:#2E2E2E;">hilaire et </span><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/mediastinal-lymph-node-enlargement?lang=us">m&eacute;diastinale </a></span><span style="font-size:18px; color:#2E2E2E;">: peu fr&eacute;quente 8,15&nbsp;</span></li><span style="font-size:18px; color:#512B89;">Traitement et pronostic</span><span style="font-size:18px; color:#512B89;"><br /></span><span style="font-size:18px; color:#2E2E2E;">Pour une discussion g&eacute;n&eacute;rale sur le traitement et le pronostic, veuillez vous r&eacute;f&eacute;rer &agrave; la </span><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/granulomatosis-with-polyangiitis?lang=us">granulomatose avec polyangiite</a></span><span style="font-size:18px; color:#2E2E2E;">.</span><span style="font-size:18px; color:#2E2E2E;"><br /></span><span style="font-size:18px; color:#512B89;">Complications</span><span style="font-size:18px; color:#512B89;"><br /></span><ul class="disc"><li><span style="font-size:18px; color:#2E2E2E;">infection pulmonaire superpos&eacute;e</span></li><li><span style="font-size:18px; color:#2E2E2E;">St&eacute;nose des voies respiratoires / st&eacute;nose</span><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/tracheobronchial-stenosis?lang=us"> trach&eacute;obronchique </a></span><span style="font-size:18px; color:#2E2E2E;">9-11</span></li><ul class="circle"><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/subglottic-stenosis?lang=us">La st&eacute;nose sous-glottique </a></span><span style="font-size:18px; color:#2E2E2E;">est la plus fr&eacute;quente avec une occurrence estim&eacute;e &agrave; environ ~20 % (intervalle 16-23 %) 9&nbsp;</span></li></ul><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/pulmonary-haemorrhage?lang=us">H&eacute;morragie pulmonaire</a></span></li></ul><span style="font-size:18px; color:#512B89;">Diagnostic diff&eacute;rentiel</span><span style="font-size:18px; color:#512B89;"><br /></span><span style="font-size:18px; color:#2E2E2E;">Le diff&eacute;rentiel d&eacute;pend de la caract&eacute;ristique dominante.</span><span style="font-size:18px; color:#2E2E2E;"><br /></span><ul class="disc"><li><span style="font-size:18px; color:#636363;"><a href="https://radiopaedia.org/articles/missing?article%5Btitle%5D=differential-of-multiple-pulmonary-nodules&lang=us">Diff&eacute;rentiel de multiples nodules pulmonaires</a></span></li><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/solitary-pulmonary-nodule-1?lang=us">Diff&eacute;rentiel d'un seul nodule pulmonaire </a></span><span style="font-size:18px; color:#2E2E2E;">(pr&eacute;sentation inhabituelle)</span></li><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/pulmonary-cavity-1?lang=us">Diff&eacute;rentiel d'une masse pulmonaire cavitante</a></span></li><li><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/chronic-bilateral-airspace-opacification-differential?lang=us">Diff&eacute;rentiel de consolidation chronique de l'espace a&eacute;rien</a></span></li></ul><span style="font-size:18px; color:#2E2E2E;">Dans les cas de consolidation p&eacute;riph&eacute;rique, les apparences sont tr&egrave;s similaires aux </span><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/pulmonary-infarct?lang=us">infarctus pulmonaires</a></span><span style="font-size:18px; color:#2E2E2E;">.</span><span style="font-size:18px; color:#2E2E2E;"><br /></span><span style="font-size:18px; color:#2E2E2E;">Pour l'&eacute;paississement trach&eacute;al, </span><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/relapsing-polychondritis?lang=us">la polychondrite r&eacute;currente </a></span><span style="font-size:18px; color:#2E2E2E;">et </span><span style="font-size:18px; color:#325489;"><a href="https://radiopaedia.org/articles/tracheobronchopathia-osteochondroplastica?lang=us">la tracheobronchopathie osteochondroplastica </a></span><span style="font-size:18px; color:#2E2E2E;">pourraient &ecirc;tre envisag&eacute;es, bien que celles-ci aient tendance &agrave; &eacute;pargner la paroi post&eacute;rieure et &agrave; avoir des calcifications 8.</span><span style="font-size:18px; color:#2E2E2E;"><br /></span><span style="font-size:18px; color:#512B89;">Points pratiques</span><span style="font-size:18px; color:#512B89;"><br /></span><ul class="disc"><li><span style="font-size:18px; color:#2E2E2E;">Bien que la manifestation la plus courante de la maladie r&eacute;currente/rechute soit les nodules cavitaires, les patients peuvent rechuter avec un sch&eacute;ma d'implication diff&eacute;rent de leur pr&eacute;sentation initiale 3</span></li></ul>]]></content:encoded></item></channel>
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