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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">oncotomsk</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский онкологический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Siberian journal of oncology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1814-4861</issn><issn pub-type="epub">2312-3168</issn><publisher><publisher-name>Tomsk National Research Medical Сепtеr of the Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21294/1814-4861-2024-23-2-139-146</article-id><article-id custom-type="elpub" pub-id-type="custom">oncotomsk-3050</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>СЛУЧАЙ ИЗ КЛИНИЧЕСКОЙ ПРАКТИКИ</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>HRD-негативная карцинома яичника высокой степени злокачественности у пациентки с наследственной мутацией BRCA2</article-title><trans-title-group xml:lang="en"><trans-title>HRD-negative high-grade carcinoma of the ovary in BRCA2 pathogenic variant carrier</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6304-1609</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соколенко</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Sokolenko</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Соколенко Анна Петровна - кандидат медицинских наук, научный сотрудник научной лаборатории молекулярной онкологии, ФГБУ «НМИЦ онкологии им. Н.Н. Петрова» Минздрава России; доцент кафедры общей и молекулярной медицинской генетики, ФГБОУ ВО «СПбГПМУ» Минздрава России.</p><p>197758, Санкт-Петербург, пос. Песочный, ул. Ленинградская, 68; 194100, Санкт-Петербург, ул. Литовская, 2</p></bio><bio xml:lang="en"><p>Anna P. Sokolenko - MD, PhD, Senior Researcher, Laboratory of Molecular Oncology, Department of Tumor Biology, N.N. Petrov National Medical Oncology Research Center of the Ministry of Health of Russia; Associate Professor, Department of General and Molecular Medical Genetics, Saint Petersburg State Pediatric Medical University of the Ministry of Health of Russia.</p><p>68, Leningradskaya St., Saint Petersburg, Pesochny village, 197758; 2, Litovskaya St., Saint Petersburg, 194100</p></bio><email xlink:type="simple">annasokolenko@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2439-2531</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Полетаева</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Poletaeva</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Полетаева Светлана Владимировна - кандидат медицинских наук, доцент кафедры общей и клинической патологии: патологической анатомии и патологической физиологии, ФГБОУ ВО «СамГМУ» Минздрава России; врач-патологоанатом, ГБУЗ «Самарский ОКОД» Минздрава России.</p><p>443099, Самара, ул. Чапаевская, 89; 443031, Самара, ул. Солнечная, 50</p></bio><bio xml:lang="en"><p>Svetlana V. Poletaeva - MD, PhD, Associate Professor, Department of General and Clinical Pathology: Pathological Anatomy and Pathological Physiology, Samara State Medical University of the Ministry of Health of Russia; Pathologist, Samara Regional Clinical Oncology Hospital of the Ministry of Health of Russia.</p><p>89, Chapaevskaya St., Samara, 443099; 50, Solnechnaya St., Samara, 443031</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0649-9693</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шестакова</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Shestakova</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шестакова Анна Дмитриевна - врач-патологоанатом патологоанатомического отделения.</p><p>197758, Санкт-Петербург, пос. Песочный, ул. Ленинградская, 68</p></bio><bio xml:lang="en"><p>Anna D. Shestakova - MD, Pathologist, Pathology Department, N.N. Petrov National Medical Oncology Research Center of the Ministry of Health of Russia.</p><p>68, Leningradskaya St., Saint Petersburg, Pesochny village, 197758</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1719-7498</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Городнова</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorodnova</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Городнова Татьяна Васильевна - кандидат медицинских наук, врач-онколог научного отделения онкогинекологии.</p><p>197758, Санкт-Петербург, пос. Песочный, ул. Ленинградская, 68</p></bio><bio xml:lang="en"><p>Tatiana V. Gorodnova - MD, PhD, Oncologist, Department of Gynecological Oncology, N.N. Petrov National Medical Oncology Research Center of the Ministry of Health of Russia.</p><p>68, Leningradskaya St., Saint Petersburg, Pesochny village, 197758</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6937-2740</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Берлев</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Berlev</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Берлев Игорь Викторович - доктор медицинских наук, профессор, заведующий научным отделением онкогинекологии.</p><p>197758, Санкт-Петербург, пос. Песочный, ул. Ленинградская, 68</p></bio><bio xml:lang="en"><p>Igor V. Berlev - MD, Professor, Department of Gynecological Oncology, N.N. Petrov National Medical Oncology Research Center of the Ministry of Health of Russia.</p><p>68, Leningradskaya St., Saint Petersburg, Pesochny village, 197758</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4529-7891</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Имянитов</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Imyanitov</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Имянитов Евгений Наумович - доктор медицинских наук, профессор, член-корресподент РАН, заведующий научным отделом биологии опухолевого роста, ФГБУ «НМИЦ онкологии им. Н.Н. Петрова» Минздрава России; заведующий кафедрой общей и молекулярной медицинской генетики, ФГБОУ ВО «СПбГПМУ» Минздрава России.</p><p>197758, Санкт-Петербург, пос. Песочный, ул. Ленинградская, 68; 194100, Санкт-Петербург, ул. Литовская, 2</p></bio><bio xml:lang="en"><p>Evgeny N. Imyanitov - MD, Professor, Corresponding Member of the RAS, Head of the Scientific Department of Tumor Growth Biology, N.N. Petrov National Medical Oncology Research Center of the Ministry of Health of Russia; Head of the Department of General and Molecular Medical Genetics, Saint Petersburg State Pediatric Medical University of the Ministry of Health of Russia.</p><p>68, Leningradskaya St., Saint Petersburg, Pesochny village, 197758; 2, Litovskaya St., Saint Petersburg, 194100</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Петрова» Минздрава России; ФГБОУ ВО «Санкт-Петербургский государственный педиатрический медицинский университет» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.N. Petrov National Medical Oncology Research Center of The Ministry of Health of Russia; Saint Petersburg State Pediatric Medical University of The Ministry of Health of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБОУ ВО «Самарский государственный медицинский университет» Минздрава России; ГБУЗ «Самарский областной клинический онкологический диспансер» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara State Medical University of The Ministry of Health of Russia; Samara Regional Clinical Oncology Hospital of the Ministry of Health of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Петрова» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.N. Petrov National Medical Oncology Research Center of The Ministry of Health of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>12</day><month>05</month><year>2024</year></pub-date><volume>23</volume><issue>2</issue><fpage>139</fpage><lpage>146</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Соколенко А.П., Полетаева С.В., Шестакова А.Д., Городнова Т.В., Берлев И.В., Имянитов Е.Н., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Соколенко А.П., Полетаева С.В., Шестакова А.Д., Городнова Т.В., Берлев И.В., Имянитов Е.Н.</copyright-holder><copyright-holder xml:lang="en">Sokolenko A.P., Poletaeva S.V., Shestakova A.D., Gorodnova T.V., Berlev I.V., Imyanitov E.N.</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.siboncoj.ru/jour/article/view/3050">https://www.siboncoj.ru/jour/article/view/3050</self-uri><abstract><p>Актуальность. Дефицит гомологичной рекомбинации (HRD) – это важный предиктивный маркер эффективности препаратов платины и ингибиторов поли (АДФ-рибоза)-полимеразы (PARP). Наследственные или соматические мутации генов BRCA1 или BRCA2 являются наиболее частой причиной HRD в карциномах яичника. Однако в некоторых случаях у носителей патогенных наследственных мутаций BRCA1/2 в опухоли сохраняется нормальная копия соответствующего гена и фенотип HRD не формируется. Цель исследования – описание морфологического и молекулярного портрета карциномы яичника высокой степени злокачественности у пациентки с наследственной мутацией BRCA2, не демонстрирующей дефицита гомологичной репарации ДНК. Описание клинического случая. Представлено наблюдение пациентки, 48 лет, с синхронными первично-множественными злокачественными новообразованиями: high-grade карциномой яичника и колоректальной аденокарциномой. У пациентки выявлен известный патогенный вариант BRCA2 c.658_659delgt [rs80359604]. Учитывая неопределенный гистологический вариант низкодифференцированной карциномы, а именно, отсутствие экспрессии маркеров серозной или эндометриоидной дифференцировки, а также высокую экспрессию HER2, выполнено дополнительное молекулярное исследование метастатических очагов в лимфатические узлы. Обнаружено, что в данной опухоли профиль хромосомной нестабильности не соответствует HRD и наблюдается делеция мутантного аллеля BRCA2, что исключает BRCA-подобный фенотип. Заключение. Новообразования, развивающиеся у носителей патогенных вариантов генов гомологичной рекомбинации, требуют более детального молекулярного анализа для подтверждения дефицита ДНК-репарации.</p></abstract><trans-abstract xml:lang="en"><p>Background. Homologous recombination deficiency (HRD) is a valuable molecular marker for predicting response to platinum agents and poly(ADP-ribose)-polymerase (PARP) inhibitors. Germline and somatic alterations in the BRCA1 and BRCA2 genes are the major cause of HRD in ovarian cancer. However, in some cases, tumors arising in carriers of BRCA1 or BRCA2 pathogenic variants do not lose the normal copy of the corresponding gene and are not deficient for homologous recombination. Aim of the study was to present a case of high-grade ovarian carcinoma without HRD phenotype developed in a BRCA2 mutation carrier. Case report. A 48-year-old woman was diagnosed with multiple primaries: HER2-positive high-grade ovarian cancer and colorectal adenocarcinoma. analysis of the coding BRCA1/BRCA2 sequences revealed the germline BRCA2 c.658_659delgt [rs80359604] pathogenic variant. Given the unusual histological features, namely the absence of serous or endometrioid markers and high HER2 expression, we performed additional molecular analysis of the metastatic lesions in the lymph nodes. In all samples, the pattern of chromosomal instability did not match the HRD profile and there was loss of the mutant copy of the BRCA2 gene. Therefore, this tumor lacked the BRCAness phenotype. Conclusion. Tumors arising in HRR gene mutation carriers require additional molecular analysis for a comprehensive assessment of HRD.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>карцинома яичника высокой степени злокачественности</kwd><kwd>дефицит системы репарации путем гомологичной рекомбинации</kwd><kwd>мутации BRCA1 и BRCA2</kwd><kwd>потеря гетерозиготности</kwd><kwd>BRCA-подобный фенотип</kwd></kwd-group><kwd-group xml:lang="en"><kwd>BRCA1 and BRCA2 mutations</kwd><kwd>loss of heterozygosity</kwd><kwd>BRCAness</kwd><kwd>high-grade ovarian carcinoma</kwd><kwd>homologous recombination deficiency</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа поддержана грантом РНФ [19-75-10062].</funding-statement><funding-statement xml:lang="en">This work was supported by the Russian Science Foundation [grant number 19-75-10062].</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Deans A.J., West S.C. 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