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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">vsp</journal-id><journal-title-group><journal-title xml:lang="ru">Вопросы современной педиатрии</journal-title><trans-title-group xml:lang="en"><trans-title>Current Pediatrics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-5527</issn><issn pub-type="epub">1682-5535</issn><publisher><publisher-name>Издательство «ПедиатрЪ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15690/vsp.v19i3.2117</article-id><article-id custom-type="elpub" pub-id-type="custom">vsp-2426</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>Эволюция смешанного заболевания соединительной ткани у ребенка 7 лет: клинический случай</article-title><trans-title-group xml:lang="en"><trans-title>Evolution of Mixed Connective Tissue Disease in 7 Years Old Child: Clinical Case</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5722-8490</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Макарова</surname><given-names>Т. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Makarova</surname><given-names>Tamara P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9339-2354</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вахитов</surname><given-names>Х. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Vakhitov</surname><given-names>Khakim M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0501-405X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сабирова</surname><given-names>Д. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Sabirova</surname><given-names>Dina R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сабирова Дина Рашидовна, кандидат медицинских наук, доцент кафедры госпитальной педиатрии</p><p>420012, Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>Kazan</p></bio><email xlink:type="simple">dinasabirova@mail.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/0000-0002-6662-3548</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Садыкова</surname><given-names>Д. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Sadykova</surname><given-names>Dinara I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3676-2130</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хуснутдинова</surname><given-names>Л. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Khusnutdinova</surname><given-names>Liliya R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9979-9964</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фирсова</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Firsova</surname><given-names>Natalya N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казань</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4288-3297</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кучерявая</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kucheryavaya</surname><given-names>Anna A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казань</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Детская республиканская клиническая больница</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Children’s Republican Clinical Hospital</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>31</day><month>07</month><year>2020</year></pub-date><volume>19</volume><issue>3</issue><fpage>214</fpage><lpage>219</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Макарова Т.П., Вахитов Х.М., Сабирова Д.Р., Садыкова Д.И., Хуснутдинова Л.Р., Фирсова Н.Н., Кучерявая А.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Макарова Т.П., Вахитов Х.М., Сабирова Д.Р., Садыкова Д.И., Хуснутдинова Л.Р., Фирсова Н.Н., Кучерявая А.А.</copyright-holder><copyright-holder xml:lang="en">Makarova T.P., Vakhitov K.M., Sabirova D.R., Sadykova D.I., Khusnutdinova L.R., Firsova N.N., Kucheryavaya A.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://vsp.spr-journal.ru/jour/article/view/2426">https://vsp.spr-journal.ru/jour/article/view/2426</self-uri><abstract><sec><title>Обоснование</title><p>Обоснование. Смешанное заболевание соединительной ткани (синдром Шарпа) — редкая хроническая аутоиммунная патология, при которой сочетаются отдельные признаки системной красной волчанки, системной склеродермии, ревматоидного артрита, дерматомиозита и высокий титр антител к растворимому ядерному рибонуклеопротеину. С течением времени возможна эволюция смешанного заболевания соединительной ткани в другие системные болезни. Описания случаев смешанного заболевания соединительной ткани и его трансформации у российских пациентов ранее не публиковались.</p><p>Описание клинического случая. Приведены результаты наблюдений за ребенком с клиническими и иммунологическими признаками смешанного заболевания соединительной ткани с последующим прогрессированием симптомов системной склеродермии и развитием синдрома Шегрена за короткий период времени. На фоне терапии (базисно метотрексат 10 мг/нед с последующим добавлением преднизолона 0,75 мг/кг в сут) отмечена положительная динамика с уменьшением болезненности и увеличением объема движений пораженных суставов, снижением продолжительности проявлений синдрома Рейно.</p></sec><sec><title>Заключение</title><p>Заключение. Своевременное распознавание клинических признаков дебюта системных заболеваний является необходимым условием правильной маршрутизации пациента и достижения положительной динамики болезни.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Background</title><p>Background. Mixed connective tissue disease (Sharp syndrome) is the rare chronic autoimmune pathology combining various features of systemic lupus erythematosus, systemic scleroderma, rheumatoid arthritis, dermatomyositis and high antibody titer to nuclear ribonucleoprotein. The mixed connective tissue disease may evolve into other systemic diseases over time. Description of any cases of mixed connective tissue disease and its evolution in Russian patients has not been published previously.</p><p>Clinical Case Description. The results of observations of the child with clinical and immunological signs of the mixed connective tissue disease followed by the progression of systemic scleroderma symptoms and development of Sjogren's syndrome in the short period of time are presented in the article. Improvement (such as pain attenuation, increase in volume of movements in affected joints, decrease of Raynaud syndrome manifestations duration) was observed on treatment (methotrexate 10 mg/week with subsequent addition of prednisolone 0.75 mg/kg/day).</p></sec><sec><title>Conclusion</title><p>Conclusion. Timely diagnostics of clinical signs of the systemic diseases debut is crucial for correct patient routing and for achieving of disease improvement.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>дети</kwd><kwd>смешанное заболевание соединительной ткани</kwd><kwd>синдром Шарпа</kwd><kwd>перекрестный синдром</kwd><kwd>синдром Рейно</kwd><kwd>артрит</kwd></kwd-group><kwd-group xml:lang="en"><kwd>children</kwd><kwd>mixed connective tissue disease</kwd><kwd>Sharp syndrome</kwd><kwd>overlap syndrome</kwd><kwd>Raynaud syndrome</kwd><kwd>arthritis</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Не указан.</funding-statement><funding-statement xml:lang="en">Not specified.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Алекперов Р.Т. 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