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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">clinicaloncology</journal-id><journal-title-group><journal-title xml:lang="ru">Клинический случай в онкологии</journal-title><trans-title-group xml:lang="en"><trans-title>Clinical Case in Oncology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">3034-1477</issn><issn pub-type="epub">3034-4018</issn><publisher><publisher-name>ОНКОПРАКТИК</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.62546/3034-1477-2025-3-4-35-42</article-id><article-id custom-type="elpub" pub-id-type="custom">clinicaloncology-147</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЕ СЛУЧАИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CASE REPORTS</subject></subj-group></article-categories><title-group><article-title>Клинический случай длительного течения гастроинтестинальной стромальной опухоли сигмовидной кишки на фоне терапии тирозинкиназными ингибиторами и циторедуктивных вмешательств</article-title><trans-title-group xml:lang="en"><trans-title>A clinical case of long-term GIST of the sigmoid colon during TKI therapy and cytoreductive interventions</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0402-6067</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Беляк</surname><given-names>Н. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Belyak</surname><given-names>Natalia P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Беляк Наталья Петровна,</p><p>Санкт-Петербург.</p><p>Конфликт интересов: Беляк Н.П. и Глузман М.И. являются членами редакционной коллегии данного журнала и не участвовали в редакционном рецензировании или решении о публикации этой статьи. Статья прошла принятую в журнале процедуру рецензирования. Об иных конфликтах интересов авторы не заявляли.</p></bio><bio xml:lang="en"><p>St. Petersburg.</p><p>Conflict of interests: Natalia P. Belyak and Mark I. Gluzman are an Editorial Board Members for this journal and was not involved in the editorial review or the decision to publish this article. The article underwent the journal’s peerreview process. The authors declare no other conflicts of interest.</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8965-8364</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Глузман</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Gluzman</surname><given-names>Mark I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Глузман Марк Игоревич,</p><p>Санкт-Петербург.</p><p>Конфликт интересов: Беляк Н.П. и Глузман М.И. являются членами редакционной коллегии данного журнала и не участвовали в редакционном рецензировании или решении о публикации этой статьи. Статья прошла принятую в журнале процедуру рецензирования. Об иных конфликтах интересов авторы не заявляли.</p></bio><bio xml:lang="en"><p>St. Petersburg.</p><p>Conflict of interests: Natalia P. Belyak and Mark I. Gluzman are an Editorial Board Members for this journal and was not involved in the editorial review or the decision to publish this article. The article underwent the journal’s peerreview process. The authors declare no other conflicts of interest.</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-3593-3646</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Смирнова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnova</surname><given-names>Natalia V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Смирнова Наталья Валерьевна,</p><p>Санкт-Петербург.</p></bio><bio xml:lang="en"><p>St. Petersburg.</p></bio><email xlink:type="simple">natanem1410@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный университет; Городской клинический онкологический диспансер</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St. Petersburg State University; City Clinical Oncology Dispensary</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Городской клинический онкологический диспансер</institution><country>Россия</country></aff><aff xml:lang="en"><institution>City Clinical Oncology Dispensary</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>06</day><month>08</month><year>2026</year></pub-date><volume>3</volume><issue>4</issue><fpage>35</fpage><lpage>42</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Беляк Н.П., Глузман М.И., Смирнова Н.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Беляк Н.П., Глузман М.И., Смирнова Н.В.</copyright-holder><copyright-holder xml:lang="en">Belyak N.P., Gluzman M.I., Smirnova N.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.oncocase.ru/jour/article/view/147">https://www.oncocase.ru/jour/article/view/147</self-uri><abstract><p>Гастроинтестинальные стромальные опухоли (ГИСО, gastrointestinal stromal tumor GIST) группа редких новообразований желудочно-кишечного тракта мезенхимального происхождения. Ключевым механизмом развития опухоли являются мутации в гене C-KIT или PDGFRA . Выявление данных патогенетических механизмов, а также значительный прогресс в понимании молекулярной биологии гастроинтестинальных стромальных опухолей привели к формированию персонализированного подхода в терапии ГИСО, что оказало значимое влияние на улучшение результатов лечения пациентов.</p></abstract><trans-abstract xml:lang="en"><p>Gastrointestinal stromal tumors (GISTs) are a group of rare gastrointestinal neoplasms of mesenchymal origin. Mutations in the C-KIT or PDGFRA genes are key mechanisms for tumor development. The identification of these pathogenetic mechanisms, as well as significant progress in understanding the molecular biology of gastrointestinal stromal tumors, have led to the development of a personalized approach to the treatment of GISTs, which has had a significant impact on improving patient treatment outcomes.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>гастроинтестинальная стромальная опухоль</kwd><kwd>тирозинкиназные ингибиторы</kwd><kwd>иматиниб</kwd><kwd>таргетная терапия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gastrointestinal stromal tumor</kwd><kwd>tyrosine kinase inhibitors</kwd><kwd>imatinib</kwd><kwd>targeted therapy</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Unk M., Novaković J.B., Novaković S. Molecular Mechanisms of Gastrointestinal Stromal Tumors and Their Impact on Systemic Therapy Decision // Cancers (Basel) . 2023. Feb 27. 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