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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">900</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2024-23-3-80-90</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>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">The prognostic value of the morhological types of ALK-positive anaplastic large cell lymphoma in children</article-title><trans-title-group xml:lang="ru"><trans-title>Прогностическое значение морфологических типов ALK-позитивной анапластической крупноклеточной лимфомы у детей</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3664-2876</contrib-id><name-alternatives><name xml:lang="en"><surname>Abramov</surname><given-names>D. S.</given-names></name><name xml:lang="ru"><surname>Абрамов</surname><given-names>Д. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dmitry S. Abramov - MD, a pathologist at the Pathology Department.</p><p>1 Samory Mashela St., Moscow 117997</p></bio><bio xml:lang="ru"><p>Абрамов Дмитрий Сергеевич - врач-патологоанатом патологоанатомического отделения.</p><p>117997, Москва, ул. Саморы Машела, 1</p></bio><email>abramovd_s@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Fedorova</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Федорова</surname><given-names>А. С.</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><email>info@eco-vector.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Voronin</surname><given-names>K. A.</given-names></name><name xml:lang="ru"><surname>Воронин</surname><given-names>К. 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><email>abramovd_s@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Levin</surname><given-names>P. A.</given-names></name><name xml:lang="ru"><surname>Левин</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><email>abramovd_s@bk.ru</email><xref ref-type="aff" rid="aff1"/></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><email>abramovd_s@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2574-1636</contrib-id><name-alternatives><name xml:lang="en"><surname>Volchkov</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Волчков</surname><given-names>Е. 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><email>abramovd_s@bk.ru</email><xref ref-type="aff" rid="aff1"/></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><email>abramovd_s@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7732-8184</contrib-id><name-alternatives><name xml:lang="en"><surname>Konovalov</surname><given-names>D. M.</given-names></name><name xml:lang="ru"><surname>Коновалов</surname><given-names>Д. 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><email>abramovd_s@bk.ru</email><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="2024-09-08" publication-format="electronic"><day>08</day><month>09</month><year>2024</year></pub-date><volume>23</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>80</fpage><lpage>90</lpage><history><date date-type="received" iso-8601-date="2024-10-14"><day>14</day><month>10</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-10-14"><day>14</day><month>10</month><year>2024</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/900">https://hemoncim.com/jour/article/view/900</self-uri><abstract xml:lang="en"><p>The aim of our study is to evaluate the prognostic value of the morphological types of ALK-positive anaplastic large cell lymphoma (ALK+ ALCL) in children. We performed a retrospective analysis of data on 81 cases of pediatric ALK+ ALCL which had been diagnosed in 2011–2022. All patients and/or their legal representatives signed voluntary informed consent for participation in the study, as well as for biological material testing. The analysis of medical records was carried out in accordance with the internal rules of the Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology of Ministry of Healthсare of the Russian Federation, developed and approved by the Independent Ethics Committee of the Center. The patients received treatment according to the standard protocol. We assessed overall (OS) and event-free (EFS) survival depending on the morphological type of the tumor. The median follow-up was 55.6 months. Three-year and 5-year OS rates were 81.9% and 79.8%, respectively. Three-year and 5-year EFS rates were 59.6% and 56.0%, respectively. There were no statistically significant differences in OS and EFS between the common and non-common morphological types of ALK+ ALCL. Better survival rates were observed in the patients with a lymphohistiocytic variant. We found statistically significant differences in OS (p = 0.031) and EFS (p = 0.002) between the cases with a small cell component and without it. The results suggest that ALK+ ALCL with small cell morphology has a more aggressive course in children. Validation in larger patient cohorts and further study of the biology of different morphological types are needed to develop stratified treatment approaches.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель исследования</bold>: оценить прогностическое значение морфологических типов ALK-позитивной анапластической крупноклеточной лимфомы (ALK+ АККЛ) у детей. Проведен ретроспективный анализ 81 случая педиатрической ALK+ АККЛ, диагностированной в 2011–2022 гг. Все пациенты и/или их законные представители подписали информированное добровольное согласие на участие в исследовании, а также на исследование биологического материала. Анализ медицинской информации выполнялся согласно внутренним правилам НМИЦ ДГОИ им. Дмитрия Рогачева, разработанным и одобренным независимым этическим комитетом организации. Пациенты получали лечение по стандартному протоколу. Оценивались общая (ОВ) и бессобытийная (БСВ) выживаемость в зависимости от морфологического типа опухоли. Медиана наблюдения составила 55,6 мес. Трехлетняя и 5-летняя ОВ – 81,9% и 79,8% соответственно. Трехлетняя и 5-летняя БСВ – 59,6% и 56,0% соответственно. Не выявлено статистически значимых различий в ОВ и БСВ между общим и редким морфологическими типами. Отмечена тенденция к лучшим показателям выживаемости при лимфогистиоцитарном варианте. Выявлены статистически значимые различия в ОВ (p = 0,031) и БСВ (p = 0,002) между случаями с наличием и отсутствием мелкоклеточного компонента. Результаты позволяют предположить более агрессивное течение ALK+ АККЛ с мелкоклеточной морфологией у детей. Необходимы валидация на более крупных группах пациентов и дальнейшее изучение биологии различных морфологических типов для разработки стратифицированных подходов к терапии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>ALK-positive anaplastic large cell lymphoma</kwd><kwd>pediatric oncohematology</kwd><kwd>morphological variants of anaplastic large cell lymphoma</kwd><kwd>prognostic factors</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ALK-позитивная анапластическая крупноклеточная лимфома</kwd><kwd>детская онкогематология</kwd><kwd>морфологические варианты анапластической крупноклеточной лимфомы</kwd><kwd>прогностические факторы</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Не указан</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Stein H., Mason D.Y., Gerdes J., O'Connor N., Wainscoat J., Pallesen G., et al. 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