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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">596</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2022-21-1-104-109</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CLINICAL OBSERVATIONS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЕ НАБЛЮДЕНИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Congenital combined vitamin K-dependent clotting factors deficiency: case reports</article-title><trans-title-group xml:lang="ru"><trans-title>Комбинированный дефицит витамин К-зависимых факторов: клинические наблюдения</trans-title></trans-title-group></title-group><contrib-group><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>, PhD student</p><p>117997, Moscow, Samory Mashela st., 1 </p></bio><bio xml:lang="ru"><p><bold>Флоринский Дмитрий Борисович</bold>, аспирант</p><p>117997, Москва, ул. Саморы Машела, 1</p></bio><email>dmitriy.florinskiy@fccho-moscow.ru</email><xref ref-type="aff" rid="aff1"/></contrib><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. А.</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/0000-0002-2057-2036</contrib-id><name-alternatives><name xml:lang="en"><surname>Pshonkin</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Пшонкин</surname><given-names>А. 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/0000-0001-5209-2099</contrib-id><name-alternatives><name xml:lang="en"><surname>Poletaev</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Полетаев</surname><given-names>А. 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/0000-0003-4567-1871</contrib-id><name-alternatives><name xml:lang="en"><surname>Fedorova</surname><given-names>D. V.</given-names></name><name xml:lang="ru"><surname>Федорова</surname><given-names>Д. 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/0000-0002-7534-3863</contrib-id><name-alternatives><name xml:lang="en"><surname>Seregina</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Серегина</surname><given-names>Е. 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"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">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><aff-alternatives id="aff2"><aff><institution xml:lang="en">Center for Theoretical Problems of Physicochemical Pharmacology, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">ФГБУН Центр теоретических проблем физико-химической фармакологии РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-03-30" publication-format="electronic"><day>30</day><month>03</month><year>2022</year></pub-date><volume>21</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>104</fpage><lpage>109</lpage><history><date date-type="received" iso-8601-date="2022-03-29"><day>29</day><month>03</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-03-29"><day>29</day><month>03</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, «D. Rogachev NMRCPHOI»</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-statement><copyright-year>2022</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/596">https://hemoncim.com/jour/article/view/596</self-uri><abstract xml:lang="en"><p>Congenital combined vitamin K-dependent clotting factors deficiency is an extremely rare bleeding disorder, a few cases have been described worldwide. This coagulopathy requires a differential diagnosis with vitamin K deficiency bleeding of the newborn and coagulopathy, associated with different liver disease. The world practice of treating this hemorrhagic condition is the use of vitamin K 1 (not registered in the Russian Federation), as well as a prothrombin complex concentrate. This article describes the clinical manifestations, diagnosis and specific treatment in 2 patients with this bleeding disorder. The patients' parents gave their consent to the use of their child's data, including photographs, for research purposes and in publications.</p></abstract><trans-abstract xml:lang="ru"><p>Комбинированный дефицит витамин К-зависимых факторов является крайне редкой патологией системы свертывания, описаны единичные случаи в мире. Данная коагулопатия требует дифференциального диагноза с геморрагической болезнью новорожденных и вторичной коагулопатией на фоне патологии печени. Мировой практикой лечения данного геморрагического состояния является применение витамина К1 (не зарегистрирован на территории Российской Федерации), а также концентрата протромбинового комплекса. В настоящей работе описаны клинические проявления, диагностика и специфическая терапия у 2 пациентов с данным диагнозом. Родители пациентов дали согласие на использование информации, в том числе фотографий детей, в научных исследованиях и публикациях.</p></trans-abstract><kwd-group xml:lang="en"><kwd>rare bleeding disorders</kwd><kwd>congenital combined vitamin K-dependent clotting factors deficiency</kwd><kwd>prothrombin complex concentrate</kwd><kwd>vitamin K1</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>редкие коагулопатии</kwd><kwd>комбинированный дефицит витамин К-зависимых факторов</kwd><kwd>концентрат протромбинового комплекса</kwd><kwd>витамин К1</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. Napolitano M., Mariani G., Lapecorella M., Hereditary combined deficiency of the vitamin K-dependent clotting factors Orphanet J Rare Dis 2010; 5: 21. 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