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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">569</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2021-20-4-134-138</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">A case report of lymphoepithelioma-like carcinoma in an adolescent</article-title><trans-title-group xml:lang="ru"><trans-title>Случай лимфоэпителиоидной карциномы у подростка</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7387-9197</contrib-id><name-alternatives><name xml:lang="en"><surname>Perminova</surname><given-names>M. E.</given-names></name><name xml:lang="ru"><surname>Перминова</surname><given-names>М. Е.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>a hematologist,</p><p>1 Samory Mashela St., Moscow 117997 </p></bio><bio xml:lang="ru"><p>врач-гематолог,</p><p>117997, Москва, ул. Саморы Машела, 1</p></bio><email>margarita.perminova@fccho-moscow.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8880-9266</contrib-id><name-alternatives><name xml:lang="en"><surname>Ovsyannikova</surname><given-names>G. S.</given-names></name><name xml:lang="ru"><surname>Овсянникова</surname><given-names>Г. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1 Samory Mashela St., Moscow 117997 </p></bio><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/0000-0001-9450-125X</contrib-id><name-alternatives><name xml:lang="en"><surname>Kazakova</surname><given-names>L. L.</given-names></name><name xml:lang="ru"><surname>Казакова</surname><given-names>Л. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1 Samory Mashela St., Moscow 117997 </p></bio><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/0000-0002-2057-2036</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>1 Samory Mashela St., Moscow 117997 </p></bio><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/0000-0001-8578-6572</contrib-id><name-alternatives><name xml:lang="en"><surname>Sidorov</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Сидоров</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1 Samory Mashela St., Moscow 117997 </p></bio><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/0000-0003-3937-8855</contrib-id><name-alternatives><name xml:lang="en"><surname>Bondarenko</surname><given-names>V. P.</given-names></name><name xml:lang="ru"><surname>Бондаренко</surname><given-names>В. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1 Samory Mashela St., Moscow 117997 </p></bio><bio xml:lang="ru"><p>117997, Москва, ул. Саморы Машела, 1</p></bio><xref ref-type="aff" rid="aff1"/></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>1 Samory Mashela St., Moscow 117997 </p></bio><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/0000-0002-9054-5068</contrib-id><name-alternatives><name xml:lang="en"><surname>Zhukov</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Жуков</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1 Samory Mashela St., Moscow 117997 </p></bio><bio xml:lang="ru"><p>117997, Москва, ул. Саморы Машела, 1</p></bio><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 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="2021-12-22" publication-format="electronic"><day>22</day><month>12</month><year>2021</year></pub-date><volume>20</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>134</fpage><lpage>138</lpage><history><date date-type="received" iso-8601-date="2021-12-21"><day>21</day><month>12</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-12-21"><day>21</day><month>12</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/569">https://hemoncim.com/jour/article/view/569</self-uri><abstract xml:lang="en"><p>Here we report a case of EBV-positive lymphoepithelioma-like carcinoma of the abdominal and retroperitoneal lymph nodes in a 17-year-old girl. This case is of special interest because of the rarity of the diagnosis (especially in adolescents), the unusual location of the tumor, the patient’s history of infections and autoimmune diseases (autoimmune hepatitis, Crohn’s disease) and the absence of standard treatment guidelines for this tumor. The patient and her legal representatives gave their consent to the use of the patient’s data, including photographs, for research purposes and in publications. </p></abstract><trans-abstract xml:lang="ru"><p>В статье приведено описание клинического случая 17-летней пациентки с EBV-позитивной лимфоэпителиомоподобной карциномой лимфоузлов брюшной полости и забрюшинного пространства. Клиническое наблюдение представляет собой интерес с точки зрения редкости встречаемости данного диагноза, особенно у пациентов подросткового возраста, а также неклассической локализации опухоли, наличия отягощенного инфекционного анамнеза и аутоиммунных заболеваний (аутоиммунный гепатит, болезнь Крона), отсутствия унифицированного протокола лечения данного вида опухоли. Пациентка и ее законные представители дали согласие на использование информации, в том числе фотографий, в научных исследованиях и публикациях. </p></trans-abstract><kwd-group xml:lang="en"><kwd>lymphoepithelioma-like carcinoma</kwd><kwd>teenagers</kwd><kwd>undifferentiated nasopharyngeal carcinoma</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лимфоэпителиомоподобная карцинома</kwd><kwd>подростки</kwd><kwd>недифференцированная назофарингеальная карцинома</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Hsu J., Glaser S. Epstein–Barr virus-associated malignancies: epidemiologic patterns and etiologic implications. Elsevier 2000; 34 (1): 27–53.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Iezzoni J.C., Gaffey M.J., Weiss L.M. The Role of Epstein–Barr Virus in Lymphoepithelioma-like Carcinomas. 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