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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">sibmed</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский научный медицинский журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Сибирский научный медицинский журнал</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-2512</issn><issn pub-type="epub">2410-2520</issn><publisher><publisher-name>ИЦиГ СО РАН</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18699/SSMJ20230629</article-id><article-id custom-type="elpub" pub-id-type="custom">sibmed-1331</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЙ СЛУЧАЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CASE REPORT</subject></subj-group></article-categories><title-group><article-title>Клиническое наблюдение эндомиокардита Леффлера</article-title><trans-title-group xml:lang="en"><trans-title>Clinical case of Loeffler’s endomyocarditis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3168-3695</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яшин</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Yashin</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Яшин Сергей Сергеевич</p><p>443099, Самара, ул. Чапаевская, 89</p></bio><bio xml:lang="en"><p>Sergey S. Yashin</p><p>443099, Samara, Chapaevskaya st., 89</p></bio><email xlink:type="simple">s.s.yashin@samsmu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0026-309X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Юнусова</surname><given-names>Ю. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Yunusova</surname><given-names>Yu. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юнусова Юлия Рафаильевна - к.м.н.</p><p>443099, Самара, ул. Чапаевская, 89</p></bio><bio xml:lang="en"><p>Yulia R. Yunusova - candidate of medical sciences.</p><p>443099, Samara, Chapaevskaya st., 89</p></bio><email xlink:type="simple">yu.r.yunusova@samsmu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-3760-1322</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чадаева</surname><given-names>М. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Chadayeva</surname><given-names>M. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чадаева Мария Николаевна</p><p>443099, Самара, ул. Чапаевская, 89</p></bio><bio xml:lang="en"><p>Maria N. Chadaeva</p><p>443099, Samara, Chapaevskaya st., 89</p></bio><email xlink:type="simple">mchadaewa03@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Самарский государственный медицинский университет Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara State Medical University of Minzdrav of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>11</day><month>01</month><year>2024</year></pub-date><volume>43</volume><issue>6</issue><fpage>229</fpage><lpage>234</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Яшин С.С., Юнусова Ю.Р., Чадаева М.Н., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Яшин С.С., Юнусова Ю.Р., Чадаева М.Н.</copyright-holder><copyright-holder xml:lang="en">Yashin S.S., Yunusova Y.R., Chadayeva M.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://sibmed.elpub.ru/jour/article/view/1331">https://sibmed.elpub.ru/jour/article/view/1331</self-uri><abstract><p>Эозинофильный эндомиокардит вызывается инфильтрацией эозинофилами тканей сердца с развитием специфического воспаления. Главным этиологическим фактором заболевания является значительное увеличение уровня эозинофилов в периферической крови. Причинами синдрома Леффлера могут быть такие факторы и патологические состояния, как идиопатический гиперэозинофильный синдром, аллергические заболевания, паразитарные инфекции, аутоиммунные процессы, онкологические заболевания. Представлен клинический случай синдрома Леффлера с поражением сердца, легких, печени, почек и поджелудочной железы у пациента 84 лет. В статье обсуждаются сложности дифференциальной диагностики данного синдрома из-за индивидуальности клинической картины и признаков течения. Своевременная диагностика подобного состояния позволит не допустить быстрого развития тяжелых осложнений и провести соответствующую терапию, что значительно продлит жизнь пациентов с синдромом Леффлера. Однако при наличии неспецифических симптомов диагностика данного заболевания может представлять диагностическую сложность для врача.</p></abstract><trans-abstract xml:lang="en"><p>Eosinophilic endomyocarditis is caused by direct infiltration of heart tissue by eosinophils with the development of specific inflammation. The main etiological factor of the disease is a significant increase in the level of eosinophils in peripheral blood. Loeffler syndrome can be caused by such factors and pathological conditions as idiopathic hypereosinophilic syndrome, allergic diseases, parasitic infections, autoimmune processes, cancer. A clinical case of Loeffler syndrome in an 84-year-old patient with heart, lung, liver, kidney and pancreatic lesions is presented. Difficulties of differential diagnostics of this syndrome because of individual clinical picture and signs of the course are discussed in the article. Timely diagnosis of such a condition will prevent the rapid development of severe complications and carry out appropriate therapy, which will significantly prolong the life of patients with Loeffler syndrome. However, in the presence of nonspecific symptoms, the diagnosis of this disease may be diagnostically difficult for the physician.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>эндомиокардит</kwd><kwd>синдром Леффлера</kwd><kwd>эозинофилы</kwd><kwd>кардиомиопатия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>endomyocarditis</kwd><kwd>Loeffler’s syndrome</kwd><kwd>eosinophils</kwd><kwd>cardiomyopathy</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Sheikh H., Siddiqui M., Uddin S.M.M., Haq A., Yaqoob U. The clinicopathological profile of eosinophilic myocarditis. 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