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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Oncology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Oncology</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский онкологический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1028-9984</issn><issn publication-format="electronic">2412-9119</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">633996</article-id><article-id pub-id-type="doi">10.17816/onco633996</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Case Reports</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинические случаи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Treatment strategy for metastatic luminal HER2-negative breast cancer with germline BRCA1/2 mutations: clinical experience with olaparib</article-title><trans-title-group xml:lang="ru"><trans-title>Выбор тактики лечения метастатического люминального HER2-негативного рака молочной железы с герминальными мутациями в генах BRCA1/2. Опыт применения олапариба в клинической практике</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8149-0085</contrib-id><contrib-id contrib-id-type="spin">2809-7737</contrib-id><name-alternatives><name xml:lang="en"><surname>Frolova</surname><given-names>Mona A.</given-names></name><name xml:lang="ru"><surname>Фролова</surname><given-names>Мона Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>доктор медицинских наук</p></bio><email>drfrolova@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5304-9682</contrib-id><contrib-id contrib-id-type="spin">4722-1219</contrib-id><name-alternatives><name xml:lang="en"><surname>Stenina</surname><given-names>Marina B.</given-names></name><name xml:lang="ru"><surname>Стенина</surname><given-names>Марина Борисовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>доктор медицинских наук</p></bio><email>mstenina@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Blokhin National Medical Research Center of Oncology</institution></aff><aff><institution xml:lang="ru">Национальный медицинский исследовательский центр онкологии имени Н.Н. Блохина</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-11-09" publication-format="electronic"><day>09</day><month>11</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2024-12-20" publication-format="electronic"><day>20</day><month>12</month><year>2024</year></pub-date><volume>29</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>148</fpage><lpage>155</lpage><history><date date-type="received" iso-8601-date="2024-07-01"><day>01</day><month>07</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-10-29"><day>29</day><month>10</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Эко-Вектор</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2027-12-20"/></permissions><self-uri xlink:href="https://rjonco.com/1028-9984/article/view/633996">https://rjonco.com/1028-9984/article/view/633996</self-uri><abstract xml:lang="en"><p>Among breast cancer cases, approximately 10% are associated with mutations in the <italic>BRCA1</italic>/<italic>2</italic> genes, and about 50% of these cases present with a luminal HER2-negative phenotype. The standard first-line therapy for this subtype is sequential lines of hormone therapy, including combinations with various targeted drugs (CZK4/6 inhibitors, PI3K inhibitors, mTOR). PARP inhibitors are also a possible option for the treatment of metastatic <italic>BRCA</italic>-associated HER2-negative breast cancer.</p> <p>We present a clinical case of successful use of olaparib as a third-line therapy for metastatic luminal HER2-negative breast cancer. Through this case, we discuss the role of various treatment strategies in managing metastatic <italic>BRCA</italic>-associated luminal HER2-negative breast cancer.</p></abstract><trans-abstract xml:lang="ru"><p>Среди всех случаев рака молочной железы около 10% ассоциированы с носительством мутаций в генах <italic>BRCA1/2</italic>. Из них примерно 50% случаев имеют люминальный HER2-негативный фенотип. Стандартом первых линий терапии данного подтипа являются последовательные линии гормонотерапии, в том числе в комбинации в различными таргетными препаратами (ингибиторы ЦЗК4/6, ингибиторы PI3K, mTOR). PARP ингибиторы также представляют собой возможную опцию лечения метастатического <italic>BRCA</italic>-ассоциированного HER2-негативного рака молочной железы.</p> <p>Мы представляем клинический случай успешного применения олапариба в качестве 3-й линии терапии больного метастатическим люминальным HER2-негативным раком молочной железы. На примере данного клинического случая обсуждается возможное место различных вариантов терапии метастатического <italic>BRCA</italic>-ассоциированного люминального HER2-негативного рака молочной железы.</p></trans-abstract><kwd-group xml:lang="en"><kwd>luminal HER2-negative breast cancer</kwd><kwd>BRCA1/2 mutations</kwd><kwd>clinical case</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>люминальный HER2-негативный рак молочной железы</kwd><kwd>BRCA1/2 мутации</kwd><kwd>клинический случай</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">Cardoso F, Paluch-Shimon S, Senkus E, et al. 5th ESO-ESMO international consensus guidelines for advanced breast cancer (ABC 5). 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