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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Pediatric Hematology/Oncology and Immunopathology</journal-id><journal-title-group><journal-title xml:lang="en">Pediatric Hematology/Oncology and Immunopathology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы гематологии/онкологии и иммунопатологии в педиатрии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1726-1708</issn><issn publication-format="electronic">2414-9314</issn><publisher><publisher-name xml:lang="en">Fund Doctors, Innovations, Science for Children</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">696</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2023-22-1-78-83</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">The prevalence of rare bleeding disorders among children in the Russian Federation</article-title><trans-title-group xml:lang="ru"><trans-title>Выявляемость редких коагулопатий у детей в Российской Федерации</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4384-6754</contrib-id><name-alternatives><name xml:lang="en"><surname>Zharkov</surname><given-names>P. A.</given-names></name><name xml:lang="ru"><surname>Жарков</surname><given-names>П. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p> Moscow </p></bio><bio xml:lang="ru"><p> Москва </p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4555-9337</contrib-id><name-alternatives><name xml:lang="en"><surname>Florinskiy</surname><given-names>D. B.</given-names></name><name xml:lang="ru"><surname>Флоринский</surname><given-names>Д. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Dmitry B. Florinskiy</bold>, a postgraduate student and a pediatrician</p><p>1 Samory Mashela St., Moscow 117997, Russia </p></bio><bio xml:lang="ru"><p><bold>Флоринский Дмитрий Борисович</bold>, аспирант, врач-педиатр</p><p>117997, Москва, ул. Саморы Машела, 1</p></bio><email>mitia94@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0143-1921</contrib-id><name-alternatives><name xml:lang="en"><surname>Aleynikova</surname><given-names>O. V.</given-names></name><name xml:lang="ru"><surname>Алейникова</surname><given-names>О. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p> Moscow </p></bio><bio xml:lang="ru"><p> Москва </p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2322-5734</contrib-id><name-alternatives><name xml:lang="en"><surname>Novichkovа</surname><given-names>G. A.</given-names></name><name xml:lang="ru"><surname>Новичкова</surname><given-names>Г. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p> Moscow </p></bio><bio xml:lang="ru"><p> Москва </p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">The Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр детской гематологии, онкологии и иммунологии им. Дмитрия Рогачева» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-01" publication-format="electronic"><day>01</day><month>03</month><year>2023</year></pub-date><volume>22</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>78</fpage><lpage>83</lpage><history><date date-type="received" iso-8601-date="2022-11-02"><day>02</day><month>11</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2023-02-28"><day>28</day><month>02</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, «D. Rogachev NMRCPHOI»</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">«D. Rogachev NMRCPHOI»</copyright-holder><copyright-holder xml:lang="ru">ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://hemoncim.com/jour/article/view/696">https://hemoncim.com/jour/article/view/696</self-uri><abstract xml:lang="en"><p>Rare bleeding disorders account for about 3–5% of all inherited bleeding disorders. Due to the rarity and complexity of diagnosing these disorders, their prevalence estimates vary greatly. There is currently no national registry of rare inherited bleeding disorders and their prevalence across the country has not been studied yet. Aim: to estimate the prevalence of rare coagulation disorders among Russian children. For this multicenter study, we used retrospective anonymous patient data collected during clinical practice, so the approval of the ethics committee was not required. We analyzed completed questionnaires containing the number of patients with rare bleeding disorders aged from 0 to 18 years from 72 subjects of the Russian Federation. The survey had been conducted from April to June 2022. Our analysis included patients with deficiencies of factor I, II, V, VII, X, XI or XIII, as well as with combined factor deficiencies and unspecified hemorrhagic conditions. According to the reported data, the total number of children with rare bleeding disorders is 398. The most common disorder is deficiency of factor VII (52%, <italic>n </italic>= 210); it is followed by fibrinogen deficiency (16%, <italic>n </italic>= 63) and deficiency of factor X (12%, <italic>n </italic>= 48). Deficiencies of factors XI, V and XIII account for 9% (<italic>n </italic>= 35), 5% (<italic>n </italic>= 20), and 4.5% (<italic>n </italic>= 18) of all cases, respectively. Combined factor deficiency was diagnosed in 1.7% of patients (<italic>n </italic>= 7) and factor II deficiency was detected in only 1% of patients (<italic>n </italic>= 4). In order to determine the actual prevalence and incidence of rare coagulation disorders and their clinical manifestations and to identify the need for factor concentrates, it is necessary to establish a national registry of rare bleeding disorders, following the example of the national hemophilia registry.</p></abstract><trans-abstract xml:lang="ru"><p>Редкие коагулопатии составляют около 3–5% всех наследственных коагулопатий. В связи с крайне редкой встречаемостью и сложностью диагностики данные о реальной распространенности сильно варьируют. На данный момент в Российской Федерации (РФ) нет единого регистра пациентов с редкими наследственными коагулопатиями, а их распространенность на территории нашей страны не изучена. Цель – провести анализ выявляемости редких коагулопатий у детского населения в РФ. В данном многоцентровом исследовании использованы ретроспективные неперсонифицированные данные пациентов, полученные в ходе рутинной клинической практики, поэтому оно не требовало одобрения этического комитета. Ретроспективно были проанализированы заполненные анкеты с указанием числа детей от 0 до 18 лет из 72 субъектов РФ с редкими коагулопатиями. Анкетирование проводилось с апреля по июнь 2022 г. Анализировали число детей с дефицитом I, II, V, VII, X, XI, XIII факторов, а также с сочетанным дефицитом факторов и пациентов с неуточненным геморрагическим состоянием. Согласно полученным данным, общее число пациентов с редкими коагулопатиями составляет 398 человек, наиболее распространенной патологией является дефицит VII фактора – 52% (<italic>n </italic>= 210), второе место занимает дефицит фибриногена – 16% (<italic>n </italic>= 63), третье – дефицит X фактора – 12% (<italic>n </italic>= 48), четвертое – дефицит XI фактора – 9% (<italic>n </italic>= 35), пятое – дефицит V фактора – 5% (<italic>n </italic>= 20), шестое – дефицит XIII фактора – 4,5% (<italic>n </italic>= 18), далее идут комбинированные дефициты – 1,7% (<italic>n </italic>= 7) и замыкает список дефицит II фактора – 1% (<italic>n </italic>= 4). Для объективного подсчета пациентов с редкими коагулопатиями, характеристики клинических проявлений и определения потребности в концентратах факторов требуется создание единого общероссийского регистра по примеру регистра пациентов с гемофилией.</p></trans-abstract><kwd-group xml:lang="en"><kwd>rare bleeding disorders</kwd><kwd>children</kwd><kwd>bleeding</kwd><kwd>registry</kwd><kwd>factor concentrate</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>редкие коагулопатии</kwd><kwd>дети</kwd><kwd>кровотечения</kwd><kwd>регистр</kwd><kwd>концентрат фактора</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">1. Mannucci P.M., Duga S., Peyvandi F. Recessively inherited coagulation disorders. Blood 2004; 104: 1243–52.</mixed-citation><mixed-citation xml:lang="ru">Mannucci P.M., Duga S., Peyvandi F. Recessively inherited coagulation disorders. 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