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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">477</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2021-20-1-27-39</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">Prognostic significance of various 11q23/KMT2A rearrangements in infants with acute lymphoblastic leuekemia</article-title><trans-title-group xml:lang="ru"><trans-title>Прогностическая роль различных перестроек 11q23/KMT2A у детей первого года жизни с острым лимфобластным лейкозом</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9881-6221</contrib-id><name-alternatives><name xml:lang="en"><surname>Tsaur</surname><given-names>G. A.</given-names></name><name xml:lang="ru"><surname>Цаур</surname><given-names>Г. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Med. Sci., Head of the Laboratory of Molecular Biology, Immunophenotyping and Pathomorphology;a leading researcher at the Laboratory of Cellular Therapy for Oncohematological Diseases;</p><p>Associate Professor at the Department of Clinical Laboratory Diagnostics and Bacteriology,</p><p>32 S. Deryabinoy St., Ekaterinburg 620149</p></bio><bio xml:lang="ru"><p>д-р мед. наук, заведующий лабораторией молекулярной биологии, иммунофенотипирования и патоморфологии;</p><p>ведущий научный сотрудник лаборатории клеточной терапии онкогематологических заболеваний;</p><p>доцент кафедры клинической лабораторной диагностики и бактериологии,</p><p>620149, Екатеринбург, ул. С. Дерябиной, 32</p></bio><email>tsaur@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Riger</surname><given-names>T. O.</given-names></name><name xml:lang="ru"><surname>Ригер</surname><given-names>Т. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0889-6986</contrib-id><name-alternatives><name xml:lang="en"><surname>Popov</surname><given-names>A. M.</given-names></name><name xml:lang="ru"><surname>Попов</surname><given-names>А. М.</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="aff4"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kustanovich</surname><given-names>A. M.</given-names></name><name xml:lang="ru"><surname>Кустанович</surname><given-names>А. М.</given-names></name></name-alternatives><address><country country="IL">Israel</country></address><bio xml:lang="en"><p>Jerusalem</p></bio><bio xml:lang="ru"><p>Иерусалим</p></bio><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2352-7716</contrib-id><name-alternatives><name xml:lang="en"><surname>Olshanskaya</surname><given-names>Yu. V.</given-names></name><name xml:lang="ru"><surname>Ольшанская</surname><given-names>Ю. 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="aff4"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nasedkina</surname><given-names>T. V.</given-names></name><name xml:lang="ru"><surname>Наседкина</surname><given-names>Т. 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="aff6"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Solodovnikov</surname><given-names>A. G.</given-names></name><name xml:lang="ru"><surname>Солодовников</surname><given-names>А. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio><xref ref-type="aff" rid="aff8"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shorikov</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Шориков</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Demina</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Демина</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio><xref ref-type="aff" rid="aff11"/><xref ref-type="aff" rid="aff27"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Plekhanova</surname><given-names>O. M.</given-names></name><name xml:lang="ru"><surname>Плеханова</surname><given-names>О. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nokhrina</surname><given-names>E. S.</given-names></name><name xml:lang="ru"><surname>Нохрина</surname><given-names>Е. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9329-1828</contrib-id><name-alternatives><name xml:lang="en"><surname>Verzhbitskaya</surname><given-names>T. Yu.</given-names></name><name xml:lang="ru"><surname>Вержбицкая</surname><given-names>Т. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio><xref ref-type="aff" rid="aff11"/><xref ref-type="aff" rid="aff27"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Streneva</surname><given-names>O. V.</given-names></name><name xml:lang="ru"><surname>Стренева</surname><given-names>О. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio><xref ref-type="aff" rid="aff11"/><xref ref-type="aff" rid="aff27"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Makarova</surname><given-names>O. V.</given-names></name><name xml:lang="ru"><surname>Макарова</surname><given-names>О. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Arakaev</surname><given-names>O. R.</given-names></name><name xml:lang="ru"><surname>Аракаев</surname><given-names>О. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio><xref ref-type="aff" rid="aff11"/><xref ref-type="aff" rid="aff27"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5180-6560</contrib-id><name-alternatives><name xml:lang="en"><surname>Seveliev</surname><given-names>L. I.</given-names></name><name xml:lang="ru"><surname>Савельев</surname><given-names>Л. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio><xref ref-type="aff" rid="aff11"/><xref ref-type="aff" rid="aff17"/></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>Aleinikova</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="BY">Belarus</country></address><bio xml:lang="en"><p>Moscow;</p><p>Minsk</p></bio><bio xml:lang="ru"><p>Москва;</p><p>Минскса</p></bio><xref ref-type="aff" rid="aff4"/><xref ref-type="aff" rid="aff19"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Lapotentova</surname><given-names>E. S.</given-names></name><name xml:lang="ru"><surname>Лапотентова</surname><given-names>Е. С.</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Минск</p></bio><xref ref-type="aff" rid="aff20"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4779-1896</contrib-id><name-alternatives><name xml:lang="en"><surname>Myakova</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Мякова</surname><given-names>Н. 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="aff4"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Fominykh</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Фоминых</surname><given-names>В. 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="aff4"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kondratchik</surname><given-names>K. L.</given-names></name><name xml:lang="ru"><surname>Кондратчик</surname><given-names>К. Л.</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="aff23"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Boichenko</surname><given-names>E. G.</given-names></name><name xml:lang="ru"><surname>Бойченко</surname><given-names>Е. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Saint-Petersburg</p></bio><bio xml:lang="ru"><p>Санкт-Петербург</p></bio><xref ref-type="aff" rid="aff24"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ponomareva</surname><given-names>N. I.</given-names></name><name xml:lang="ru"><surname>Пономарева</surname><given-names>Н. И.</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="aff25"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Karachunskiy</surname><given-names>A. I.</given-names></name><name xml:lang="ru"><surname>Карачунский</surname><given-names>А. И.</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="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1643-5960</contrib-id><name-alternatives><name xml:lang="en"><surname>Roumiantsev</surname><given-names>A. G.</given-names></name><name xml:lang="ru"><surname>Румянцев</surname><given-names>А. Г.</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="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1885-3912</contrib-id><name-alternatives><name xml:lang="en"><surname>Fechina</surname><given-names>L. G.</given-names></name><name xml:lang="ru"><surname>Фечина</surname><given-names>Л. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ekaterinburg</p></bio><bio xml:lang="ru"><p>Екатеринбург</p></bio><xref ref-type="aff" rid="aff26"/><xref ref-type="aff" rid="aff27"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Regional Children’s Hospital</institution></aff><aff><institution xml:lang="ru">ГАУЗ СО «Областная детская клиническая больница»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Research Institute of Medical Cell Technologies</institution></aff><aff><institution xml:lang="ru">ГАУЗ СO «Институт медицинских клеточных технологий»</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Ural State Medical University of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Уральский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff4"><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="aff5"><aff><institution xml:lang="en">The Sharett Institute of Oncology, Hadassah Medical Center</institution></aff><aff><institution xml:lang="ru">Институт онкологии Шаретт, Медицинский Центр Хадасса</institution></aff></aff-alternatives><aff-alternatives id="aff6"><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&#13;
Engelhardt Institute of Molecular Biology, Russian Academy of Sciences</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="aff7"><aff><institution xml:lang="ru">ФГБУН «Институт молекулярной биологии им. В.А. Энгельгардта Российской академии наук»</institution></aff><aff><institution xml:lang="en">Research Institute of Medical Cell Technologies</institution></aff></aff-alternatives><aff-alternatives id="aff8"><aff><institution xml:lang="en">Ural State Medical University of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ГАУЗ СO «Институт медицинских клеточных технологий»</institution></aff></aff-alternatives><aff-alternatives id="aff9"><aff><institution xml:lang="ru">ФГБОУ ВО «Уральский государственный медицинский университет» Минздрава России</institution></aff><aff><institution xml:lang="en">PET-Technology Center of Nuclear Medicine</institution></aff></aff-alternatives><aff-alternatives id="aff10"><aff><institution xml:lang="ru">ООО «ПЭТ-Технолоджи»</institution></aff><aff><institution xml:lang="en">Regional Children’s Hospital</institution></aff></aff-alternatives><aff-alternatives id="aff11"><aff><institution xml:lang="en">Research Institute of Medical Cell Technologies</institution></aff><aff><institution xml:lang="ru">ГАУЗ СО «Областная детская клиническая больница»</institution></aff></aff-alternatives><aff-alternatives id="aff12"><aff><institution xml:lang="ru">ГАУЗ СO «Институт медицинских клеточных технологий»</institution></aff><aff><institution xml:lang="en">Regional Children’s Hospital</institution></aff></aff-alternatives><aff-alternatives id="aff13"><aff><institution xml:lang="ru">ГАУЗ СO «Институт медицинских клеточных технологий»</institution></aff><aff><institution xml:lang="en">Regional Children’s Hospital</institution></aff></aff-alternatives><aff-alternatives id="aff14"><aff><institution xml:lang="ru">ГАУЗ СO «Институт медицинских клеточных технологий»</institution></aff><aff><institution xml:lang="en">Regional Children’s Hospital</institution></aff></aff-alternatives><aff-alternatives id="aff15"><aff><institution xml:lang="ru">ГАУЗ СО «Областная детская клиническая больница»</institution></aff><aff><institution xml:lang="en">Regional Children’s Hospital</institution></aff></aff-alternatives><aff-alternatives id="aff16"><aff><institution xml:lang="ru">ГАУЗ СO «Институт медицинских клеточных технологий»</institution></aff><aff><institution xml:lang="en">Regional Children’s Hospital</institution></aff></aff-alternatives><aff-alternatives id="aff17"><aff><institution xml:lang="en">Ural State Medical University of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ГАУЗ СO «Институт медицинских клеточных технологий»&#13;
ФГБОУ ВО «Уральский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff18"><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="aff19"><aff><institution xml:lang="en">Belarussian Research Center for Pediatric Oncology, Hematology and Immunology</institution></aff><aff><institution xml:lang="ru">ГУ «Республиканский научно-практический центр детской онкологии, гематологии и иммунологии»</institution></aff></aff-alternatives><aff-alternatives id="aff20"><aff><institution xml:lang="en">PET-Technology Center of Nuclear Medicine</institution></aff><aff><institution xml:lang="ru">ГУ «Республиканский научно-практический центр детской онкологии, гематологии и иммунологии»</institution></aff></aff-alternatives><aff-alternatives id="aff21"><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="aff22"><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="aff23"><aff><institution xml:lang="en">Morozov Children's City Clinical Hospital of the Moscow City Healthcare Department</institution></aff><aff><institution xml:lang="ru">ГБУЗ «Морозовская детская городская клиническая больница Департамента здравоохранения г. Москвы»</institution></aff></aff-alternatives><aff-alternatives id="aff24"><aff><institution xml:lang="en">City Children’s Hospital №1</institution></aff><aff><institution xml:lang="ru">СПб ГБУЗ «Детская городская больница №1»</institution></aff></aff-alternatives><aff-alternatives id="aff25"><aff><institution xml:lang="en">Russian Children’s Clinical Hospital of the N.I. Pirogov Russian National Research Medical University, of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Российская детская клиническая больница ФГАОУ ВО «Российский национальный исследовательский медицинский университет им. Н.И. Пирогова» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff26"><aff><institution xml:lang="en">Regional Children’s Hospital&#13;
Research Institute of Medical Cell Technologies</institution></aff><aff><institution xml:lang="ru">ГАУЗ СО «Областная детская клиническая больница»</institution></aff></aff-alternatives><aff id="aff27"><institution>ГАУЗ СO «Институт медицинских клеточных технологий»</institution></aff><pub-date date-type="pub" iso-8601-date="2021-04-21" publication-format="electronic"><day>21</day><month>04</month><year>2021</year></pub-date><volume>20</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>27</fpage><lpage>39</lpage><history><date date-type="received" iso-8601-date="2021-04-14"><day>14</day><month>04</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-04-14"><day>14</day><month>04</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, «D. Rogachev NMRCPHOI»</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-statement><copyright-year>2021</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/477">https://hemoncim.com/jour/article/view/477</self-uri><abstract xml:lang="en"><p>The purpose of this work was evaluation of prognostic significance of 11q23/KMT2A rearrangements in infants (aged under 365 days) with B-cell precursor acute lymphoblastic leukemia (ALL) enrolled in Russian-Belarus multicenter trial MLLBaby. This study is supported by the Independent Ethics Committee and approved by the Academic Council of the Research Institute of Medical Cell Technologies (Ekaterinburg). Various 11q23/KMT2A rearrangements were revealed in 100 (72%) of 139 patients. Event-free survival (EFS) in the intermediate risk group of MLL-Baby trial was 35.1% (standard error (SE) 6.9%), in the high risk group – 38.3% (SE 7.1%) (p = 0.941). The most unfavorable prognosis had infants with translocation t(9;11)/KMT2A-MLLT3: EFS 18.8% (SE 9.8%), cumulative incidence of relapse (CIR) 75.0% (SE 9.7%). Intermediate results were obtained in patients with translocations t(4;11)/KMT2A-AFF1 and t(11;19)/KMT2A-MLLT1: EFS 36.9% (SE 7,2%) and 32,7% (SE 10.4%), respectively; CIR 46.3% (SE 7.8%) and 50.9% (SE 12.3%). The most favorable treatment outcome was achieved in infants carrying translocation t(10;11)(p12;q23)/KMT2A-MLLT10: EFS 83.3% (SE 15.2%), CIR 0,0%. In the multivariate analysis unfavorable outcome of KMT2A-rearranged infant ALL was associated with initial CNS involvement (p = 0.020), initial white blood cell count higher than 300 × 109 /L (p = 0.028), more than 5% blast cells on day 15 in bone marrow (p = 0.012) and presence of translocation t(11;19)/KMT2A-MLLT1 (p = 0.012). </p></abstract><trans-abstract xml:lang="ru"><p>Целью данной работы была оценка прогностической роли перестроек 11q23/KMT2A у детей первого года жизни с острым лимфобластным лейкозом (ОЛЛ) из B-линейных предшественников, включенных в российско-белорусское мультицентровое исследование MLL-Baby. Данное исследование одобрено независимым этическим комитетом и утверждено решением ученого совета ГАУЗ СO «Институт медицинских клеточных технологий» (Екатеринбург). Перестройки 11q23/KMT2A выявлены у 100 (72%) из 139 пациентов, включенных в исследование. Бессобытийная выживаемость (БСВ) в группе промежуточного риска протокола MLL-Baby составила 35,1% (стандартная ошибка (СО) 6,9%), в группе высокого риска – 38,3% (СО 7,1%) (p = 0,941). Наименее прогностически благоприятным оказалось наличие транслокации t(9;11)/KMT2A-MLLT3: БСВ составила 18,8% (СО 9,8%), кумулятивная частота развития рецидива (КЧР) – 75,0% (СО 9,7%). Промежуточные результаты были выявлены у пациентов с транслокациями t(4;11)/KMT2A– AFF1 и t(11;19)/KMT2A-MLLT1: БСВ – 36,9% (СО 7,2%) и 32,7% (СО 10,4%) соответственно; КЧР – 46,3% (СО 7,8%) и 50,9% (СО 12,3%) соответственно. А наилучшие показатели зафиксированы у пациентов с транслокацией t(10;11)(p12;q23)/KMT2A-MLLT10: БСВ – 83,3% (СО 15,2%), КЧР – 0,0%. В многофакторном анализе показателями, связанными с неблагоприятным исходом KMT2A-позитивного ОЛЛ в исследованной группе пациентов, были инициальный нейролейкоз (p = 0,020), инициальный гиперлейкоцитоз выше 300 × 109 /л (p = 0,028), более 5% бластов в костном мозге на 15-й день терапии (p = 0,012), наличие транслокации t(11;19)/KMT2A-MLLT1 (p = 0,012). </p></trans-abstract><kwd-group xml:lang="en"><kwd>acute lymphoblastic leukemia</kwd><kwd>prognosis</kwd><kwd>infants</kwd><kwd>11q23/KMT2A rearrangements</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>острый лимфобластный лейкоз</kwd><kwd>прогноз</kwd><kwd>дети первого года жизни</kwd><kwd>перестройки 11q23/KMT2A</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. Pieters R., De Lorenzo P., Ancliff e P., Aversa L., Brethon B., Biondi A., et al. 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