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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">mrj</journal-id><journal-title-group><journal-title xml:lang="ru">Современная ревматология</journal-title><trans-title-group xml:lang="en"><trans-title>Modern Rheumatology Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1996-7012</issn><issn pub-type="epub">2310-158X</issn><publisher><publisher-name>IMA-PRESS, LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14412/1996-7012-2017-2-54-56</article-id><article-id custom-type="elpub" pub-id-type="custom">mrj-755</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>КЛИНИЧЕСКИЕ НАБЛЮДЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL OBSERVATIONS</subject></subj-group></article-categories><title-group><article-title>Трудности дифференциальной диагностики узловатой эритемы: первичный миелофиброз как этиологический фактор</article-title><trans-title-group xml:lang="en"><trans-title>Difficulties in the differential diagnosis of erythema nodosum: Primary myelofibrosis as an etiological factor</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абдулганиева</surname><given-names>Д. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Abdulganieva</surname><given-names>D. I.</given-names></name></name-alternatives><email xlink:type="simple">sirenif@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Файрушина</surname><given-names>И. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Fayrushina</surname><given-names>I. F.</given-names></name></name-alternatives><email xlink:type="simple">sirenif@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сухорукова</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sukhorukova</surname><given-names>E. V.</given-names></name></name-alternatives><email xlink:type="simple">sirenif@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сердюк</surname><given-names>И. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Serdyuk</surname><given-names>I. L.</given-names></name></name-alternatives><email xlink:type="simple">sirenif@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кунст</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kunst</surname><given-names>M. A.</given-names></name></name-alternatives><email xlink:type="simple">sirenif@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абдракипов</surname><given-names>Р. З.</given-names></name><name name-style="western" xml:lang="en"><surname>Abdrakipov</surname><given-names>R. Z.</given-names></name></name-alternatives><email xlink:type="simple">sirenif@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Афанасьева</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Afanasyeva</surname><given-names>M. A.</given-names></name></name-alternatives><email xlink:type="simple">sirenif@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Казанский государственный медицинский университет» Минздрава России, Казань</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Medical University, Ministry of Health of Russia, Kazan</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ГАУЗ «Республиканская клиническая больница» Минздрава Республики Татарстан, Казань</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Republican Clinical Hospital, Ministry of Health of the Republic of Tatarstan, Kazan</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>25</day><month>04</month><year>2017</year></pub-date><volume>11</volume><issue>2</issue><fpage>54</fpage><lpage>56</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Абдулганиева Д.И., Файрушина И.Ф., Сухорукова Е.В., Сердюк И.Л., Кунст М.А., Абдракипов Р.З., Афанасьева М.А., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Абдулганиева Д.И., Файрушина И.Ф., Сухорукова Е.В., Сердюк И.Л., Кунст М.А., Абдракипов Р.З., Афанасьева М.А.</copyright-holder><copyright-holder xml:lang="en">Abdulganieva D.I., Fayrushina I.F., Sukhorukova E.V., Serdyuk I.L., Kunst M.A., Abdrakipov R.Z., Afanasyeva M.A.</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://mrj.ima-press.net/mrj/article/view/755">https://mrj.ima-press.net/mrj/article/view/755</self-uri><abstract><p>Узловатая эритема (УЭ) – наиболее частая форма панникулита, являющегося реактивным процессом, вызванным большим спектром этиологических факторов. Вопросы дифференциальной диагностики данной патологии не потеряли своей актуальности. В статье рассматривается клинический случай возникновения рецидивирующей УЭ в сочетании с иммунологическим феноменом (позитивность по ревматоидному фактору и антителам к митохондриям), длительной бессимптомной спленомегалией и развившимся впоследствии первичным миелофиброзом. Установление причины возникновения вторичной УЭ нередко вызывает трудности в реальной клинической практике.</p><p> </p></abstract><trans-abstract xml:lang="en"><p>Erythema nodosum (EN) is the most common form of panniculitis that is a reactive process caused by a wide variety of etiological factors. The problems with the differential diagnosis of this abnormality have not lost its relevance. The paper deals with a clinical case of recurrent EN concurrent with an immunological phenomenon (positivity for rheumatoid factor and antimitochondrial antibodies), long-lasting asymptomatic splenomegaly, and subsequently developed primary myelofibrosis. To ascertain the cause of secondary EN often causes difficulties in real clinical practice.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>узловатая эритема</kwd><kwd>дифференциальная диагностика</kwd><kwd>первичный миелофиброз</kwd></kwd-group><kwd-group xml:lang="en"><kwd>erythema nodosum</kwd><kwd>differential diagnosis</kwd><kwd>primary myelofibrosis</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">Requena L, Yus SE. Erythema nodosum. Semin Cutan Med Surg. 2007 Jun;26(2):114-25.</mixed-citation><mixed-citation xml:lang="en">Requena L, Yus SE. Erythema nodosum. 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