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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">Oncohematology</journal-id><journal-title-group><journal-title xml:lang="en">Oncohematology</journal-title><trans-title-group xml:lang="ru"><trans-title>Онкогематология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1818-8346</issn><issn publication-format="electronic">2413-4023</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">796</article-id><article-id pub-id-type="doi">10.17650/1818-8346-2023-18-1-31-38</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>RARE AND COMPLEX CLINICAL SITUATIONS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>РЕДКИЕ И СЛОЖНЫЕ КЛИНИЧЕСКИЕ СИТУАЦИИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Features of acute megakaryoblastic leukemia diagnosis in a child with Down syndrome</article-title><trans-title-group xml:lang="ru"><trans-title>Особенности диагностики острого мегакариобластного лейкоза у ребенка с синдромом Дауна</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4222-1579</contrib-id><name-alternatives><name xml:lang="en"><surname>Guskova</surname><given-names>N. K.</given-names></name><name xml:lang="ru"><surname>Гуськова</surname><given-names>Н. К.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Nailya Katifovna Guskova</bold></p><p><italic>344037, Rostov-on-Don, 14<sup>th</sup> Liniya, 63</italic></p></bio><bio xml:lang="ru"><p><bold>Наиля Катифовна Гуськова</bold></p><p><italic>344037 Ростов-на-Дону, ул. 14-я линия, 63</italic></p></bio><email>guskova.nailya@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6762-0835</contrib-id><name-alternatives><name xml:lang="en"><surname>Selyutina</surname><given-names>O. N.</given-names></name><name xml:lang="ru"><surname>Селютина</surname><given-names>О. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>344037, Rostov-on-Don, 14<sup>th</sup> Liniya, 63</italic></p></bio><bio xml:lang="ru"><p><italic>344037 Ростов-на-Дону, ул. 14-я линия, 63</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4457-3815</contrib-id><name-alternatives><name xml:lang="en"><surname>Lysenko</surname><given-names>I. B.</given-names></name><name xml:lang="ru"><surname>Лысенко</surname><given-names>И. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>344037, Rostov-on-Don, 14<sup>th</sup> Liniya, 63</italic></p></bio><bio xml:lang="ru"><p><italic>344037 Ростов-на-Дону, ул. 14-я линия, 63</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6681-3253</contrib-id><name-alternatives><name xml:lang="en"><surname>Kozel</surname><given-names>Yu. Yu.</given-names></name><name xml:lang="ru"><surname>Козель</surname><given-names>Ю. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>344037, Rostov-on-Don, 14<sup>th</sup> Liniya, 63</italic></p></bio><bio xml:lang="ru"><p><italic>344037 Ростов-на-Дону, ул. 14-я линия, 63</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0676-7398</contrib-id><name-alternatives><name xml:lang="en"><surname>Kozyuk</surname><given-names>O. V.</given-names></name><name xml:lang="ru"><surname>Козюк</surname><given-names>О. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>344037, Rostov-on-Don, 14<sup>th</sup> Liniya, 63</italic></p></bio><bio xml:lang="ru"><p><italic>344037 Ростов-на-Дону, ул. 14-я линия, 63</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2124-3218</contrib-id><name-alternatives><name xml:lang="en"><surname>Dmitrieva</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Дмитриева</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>344037, Rostov-on-Don, 14<sup>th</sup> Liniya, 63</italic></p></bio><bio xml:lang="ru"><p><italic>344037 Ростов-на-Дону, ул. 14-я линия, 63</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Baranenkova</surname><given-names>M. A.</given-names></name><name xml:lang="ru"><surname>Бараненкова</surname><given-names>М. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>344022, Rostov-on-Don, Nakhichevanskiy Pereulok, 29</italic></p></bio><bio xml:lang="ru"><p><italic>344022 Ростов-на-Дону, пер. Нахичеванский, 29</italic></p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3336-9202</contrib-id><name-alternatives><name xml:lang="en"><surname>Nozdricheva</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Ноздричева</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>344037, Rostov-on-Don, 14<sup>th</sup> Liniya, 63</italic></p></bio><bio xml:lang="ru"><p><italic>344037 Ростов-на-Дону, ул. 14-я линия, 63</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">National Medical Research Center of Oncology, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр онкологии» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Rostov State Medical University, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Ростовский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2023</year></pub-date><volume>18</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>31</fpage><lpage>38</lpage><history><date date-type="received" iso-8601-date="2023-03-14"><day>14</day><month>03</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-03-14"><day>14</day><month>03</month><year>2023</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://oncohematology.abvpress.ru/ongm/article/view/796">https://oncohematology.abvpress.ru/ongm/article/view/796</self-uri><abstract xml:lang="en"><p>We present a description of the difficulties in diagnosing acute megakaryoblastic leukemia in a child with Down syndrome aggravated by multiple comorbidities. In this case, a comprehensive assessment of clinical data, the results of an automatic complete blood count with a detailed interpretation of the entire range of parameters, as well as morphological and immunophenotypic bone marrow examination using an extended panel of monoclonal antibodies played a key role in the diagnosis.</p></abstract><trans-abstract xml:lang="ru"><p>Приводим описание сложного пути диагностики острого мегакариобластного лейкоза, отягощенного множественной сопутствующей патологией, у ребенка с синдромом Дауна. В данном случае ключевую роль в постановке диагноза сыграла комплексная оценка клинических данных, результатов автоматического общеклинического анализа крови с детальной интерпретацией всего спектра параметров, а также морфологических и иммунофенотипических исследований костного мозга с применением расширенной панели моноклональных антител.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Down syndrome</kwd><kwd>acute myeloid leukemia</kwd><kwd>acute megakaryoblastic leukemia</kwd><kwd>morphological examination of the bone marrow</kwd><kwd>flow cytometry</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>синдром Дауна</kwd><kwd>острый миелоидный лейкоз</kwd><kwd>острый мегакариобластный лейкоз</kwd><kwd>морфологическое исследование костного мозга</kwd><kwd>проточная цитофлуориметрия</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Lorsbach R.B. Megakaryoblastic disorders in children. 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