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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">386</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2020-19-3-77-83</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">Cases of transient abnormal myelopoiesis</article-title><trans-title-group xml:lang="ru"><trans-title>Случаи транзиторного аномального миелопоэза</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1216-817X</contrib-id><name-alternatives><name xml:lang="en"><surname>Кlimentova</surname><given-names>M. A.</given-names></name><name xml:lang="ru"><surname>Климентова</surname><given-names>M. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>117997, Москва, ул. Саморы Машела, 1</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5067-8288</contrib-id><name-alternatives><name xml:lang="en"><surname>Chikvina</surname><given-names>I. I.</given-names></name><name xml:lang="ru"><surname>Чиквина</surname><given-names>И. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>117997, Москва, ул. Саморы Машела, 1</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7265-0414</contrib-id><name-alternatives><name xml:lang="en"><surname>Khachatryan</surname><given-names>L. A.</given-names></name><name xml:lang="ru"><surname>Хачатрян</surname><given-names>Л. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. of Ski. (Med.), hematologist, Head of Box Department of Hematology/Oncology, </p><p>117997, Moscow, Samorу Mashela st., 1</p></bio><bio xml:lang="ru"><p>канд. мед. наук, врач-гематолог, заведующая боксированным отделением гематологии/онкологии,</p><p>117997, Москва, ул. Саморы Машела, 1 </p></bio><email>lili.2510@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology,&#13;
Ministry of Healthcare of 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="2020-09-08" publication-format="electronic"><day>08</day><month>09</month><year>2020</year></pub-date><volume>19</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>77</fpage><lpage>83</lpage><history><date date-type="received" iso-8601-date="2020-10-05"><day>05</day><month>10</month><year>2020</year></date><date date-type="accepted" iso-8601-date="2020-10-05"><day>05</day><month>10</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, «D. Rogachev NMRCPHOI»</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-statement><copyright-year>2025</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/386">https://hemoncim.com/jour/article/view/386</self-uri><abstract xml:lang="en"><p>Transient abnormal myelopoiesis (TAM) is a unique hematological syndrome specific for neonates with Down syndrome. Clinical and hematological manifestations of ТАМ are similar manifestations of acute leukemia, but they may resolve spontaneously by few weeks/months after birth. Summation trisomy 21 and GATA1 mutation in blast clone is a required element for development TAM. Presentation of this syndrome occurs in the first days of life; clinical manifestations may be absent (“silent” TAM) or even lead to death of fetus and neonate. The main interest in the study of this issue is the fact that after spontaneous regression there in 20% of cases at the age of 3–4 years developing acute megakaryoblastic leukaemia (AMKL). The basic transformation factors TAM to AMKL are unknown. In this article we represent 6 cases of TAM identified in Dmitry Rogachev National Research Center for Pediatric Hematology, Oncology, and Immunology from 2012 to 2019. Parents of these patients gave their agreement to use personal data in research and publications.</p></abstract><trans-abstract xml:lang="ru"><p>Транзиторный аномальный миелопоэз (ТАМ) – уникальный гематологический синдром, характерный для новорожденных с синдромом Дауна. Клинические и гематологические проявления ТАМ аналогичны проявлениям острого лейкоза, однако в динамике самопроизвольно разрешаются в течение нескольких недель/месяцев после рождения. Обязательным звеном в развитии данного синдрома является совокупность в клетках бластного клона трисомии 21-й хромосомы и мутации в гене GATA1. Презентация данного синдрома происходит в первые дни жизни, клинические проявления варьируют от бессимптомного («молчащего») ТАМ до гибели плода или новорожденного. Основной интерес в изучении данного вопроса представляет тот факт, что после спонтанной регрессии ТАМ в 20% случаев в возрасте до 5 лет развивается острый миелобластный лейкоз (ОМЛ), М7-вариант по FAB-классификации. Факторы, лежащие в основе трансформации ТАМ в ОМЛ доподлинно неизвестны. В настоящей статье представлен анализ 6 случаев ТАМ, выявленных в НМИЦ ДГОИ им. Дмитрия Рогачева в период с 2012 по 2019 г. Родители дали согласие на использование информации, в том числе фотографий ребенка, в научных исследованиях и публикациях.</p></trans-abstract><kwd-group xml:lang="en"><kwd>transient abnormal myelopoiesis</kwd><kwd>transient leukemia</kwd><kwd>Down syndrome</kwd><kwd>acute megakaryoblastic leukemia</kwd><kwd>GATA1</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>транзиторный аномальный миелопоэз</kwd><kwd>транзиторная лейкемия</kwd><kwd>синдром Дауна</kwd><kwd>острый мегакариобластный лейкоз</kwd><kwd>GATA1</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Watanabe K. Recent advances in the understanding of transient abnormal myelopoiesis in Down syndrome. Pediatr Int 2019; 61 (3): 222–9. DOI: 10.1111/ped.13776</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Tunstall O., Bhatnagar N., James B., Norton A., O'Marcaigh A.S., Watts T., et al. 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