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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">Head and Neck Tumors</journal-id><journal-title-group><journal-title xml:lang="en">Head and Neck Tumors</journal-title><trans-title-group xml:lang="ru"><trans-title>Опухоли головы и шеи</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2222-1468</issn><issn publication-format="electronic">2411-4634</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">970</article-id><article-id pub-id-type="doi">10.17650/2222-1468-2024-14-1-63-69</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CLINICAL CASE</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЙ СЛУЧАЙ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Rare clinical observation of pronounced response to immunotherapy in a patient with anaplastic thyroid cancer</article-title><trans-title-group xml:lang="ru"><trans-title>Анапластический рак щитовидной железы: редкое клиническое наблюдение выраженного ответа на иммунотерапию</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vontlaya</surname><given-names>D. M.</given-names></name><name xml:lang="ru"><surname>Вонтлая</surname><given-names>Д. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dinara M. Vontlaya.</p><p>32 Barnaul'skaya St., Tyumen 625000</p></bio><bio xml:lang="ru"><p>Вонтлая Динара Маннафовна.</p><p>625000 Тюмень, ул. Барнаульская, 32</p></bio><email>mirhaleeva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Stryapikhina</surname><given-names>O. V.</given-names></name><name xml:lang="ru"><surname>Стряпихина</surname><given-names>О. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>54 Odesskaya St., Tyumen 625023</p></bio><bio xml:lang="ru"><p>625023 Тюмень, ул. Одесская, 54</p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1126-6133</contrib-id><name-alternatives><name xml:lang="en"><surname>Egorin</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Егорин</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>32 Barnaul'skaya St., Tyumen 625000</p></bio><bio xml:lang="ru"><p>625000 Тюмень, ул. Барнаульская, 32</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Logvinenko</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Логвиненко</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>32 Barnaul'skaya St., Tyumen 625000</p></bio><bio xml:lang="ru"><p>625000 Тюмень, ул. Барнаульская, 32</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6831-6971</contrib-id><name-alternatives><name xml:lang="en"><surname>Tamrazov</surname><given-names>R. I.</given-names></name><name xml:lang="ru"><surname>Тамразов</surname><given-names>Р. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>32 Barnaul'skaya St., Tyumen 625000</p></bio><bio xml:lang="ru"><p>625000 Тюмень, ул. Барнаульская, 32</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Multidisciplinary clinical medical center “Medical city”</institution></aff><aff><institution xml:lang="ru">ГАУЗ ТО «Многопрофильный клинический медицинский центр «Медицинский город»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Tyumen State Medical University, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Тюменский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-06-28" publication-format="electronic"><day>28</day><month>06</month><year>2024</year></pub-date><volume>14</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>63</fpage><lpage>69</lpage><history><date date-type="received" iso-8601-date="2023-10-30"><day>30</day><month>10</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2024-06-28"><day>28</day><month>06</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Vontlaya D.M., Stryapikhina O.V., Egorin A.A., Logvinenko A.V., Tamrazov R.I.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Вонтлая Д.М., Стряпихина О.В., Егорин А.А., Логвиненко А.В., Тамразов Р.И.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Vontlaya D.M., Stryapikhina O.V., Egorin A.A., Logvinenko A.V., Tamrazov R.I.</copyright-holder><copyright-holder xml:lang="ru">Вонтлая Д.М., Стряпихина О.В., Егорин А.А., Логвиненко А.В., Тамразов Р.И.</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://ogsh.abvpress.ru/jour/article/view/970">https://ogsh.abvpress.ru/jour/article/view/970</self-uri><abstract xml:lang="en"><p>Anaplastic thyroid cancer is the rarest and the most aggressive form of thyroid cancer. It comprises 1-2 % of all cases and is characterized by rapid growth. median survival of patients with this pathology is about 5 months. Clinical manifestations of the disease are rapid deformation in the neck area, progressive respiratory distress, and dysphagia.</p><p>The article describes a clinical case of a response of unresectable, <italic>BRAF</italic>-negative, PD-L1-positive (programmed death-ligand 1) anaplastic thyroid cancer to immunotherapy with pembrolizumab.</p></abstract><trans-abstract xml:lang="ru"><p>Анапластический рак щитовидной железы - самая редкая и агрессивная форма рака данной локализации, встречающаяся примерно в 1-2 % случаев и характеризующаяся быстрым ростом. Средняя медиана выживаемости пациентов с этой патологией составляет около 5 мес. Клинические проявления заболевания - быстроразвивающаяся деформация в области шеи, прогрессирующая дыхательная недостаточность и дисфагия.</p><p>В статье описывается клинический случай ответа на иммунотерапию пембролизумабом нерезектабельного метастатического, <italic>BRAF</italic>-отрицательного, PD-L1-положительного (PD-L1 - лиганд рецептора программируемой клеточной гибели) анапластического рака щитовидной железы.</p></trans-abstract><kwd-group xml:lang="en"><kwd>anaplastic thyroid cancer</kwd><kwd>thyroid gland</kwd><kwd>immunotherapy</kwd><kwd>pembrolizumab</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>анапластический рак щитовидной железы</kwd><kwd>щитовидная железа</kwd><kwd>иммунотерапия</kwd><kwd>пембролизумаб</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">Luk'yanov S.A., Sergiyko S.V., Titov S.E. et al. 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