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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">Tumors of female reproductive system</journal-id><journal-title-group><journal-title xml:lang="en">Tumors of female reproductive system</journal-title><trans-title-group xml:lang="ru"><trans-title>Опухоли женской репродуктивной системы</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1994-4098</issn><issn publication-format="electronic">1999-8627</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">890</article-id><article-id pub-id-type="doi">10.17650/1994-4098-2021-17-4-90-95</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>GYNECOLOGY. CLINICAL CASE</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ГИНЕКОЛОГИЯ. 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">Heterogeneity of EpCAM-positive cells in low-grade serous ovarian carcinoma ascitic fluid: a clinical case</article-title><trans-title-group xml:lang="ru"><trans-title>Гетерогенность EpCAM-положительных клеток в асцитической жидкости low-grade серозной карциномы яичников: клинический случай</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4378-6915</contrib-id><name-alternatives><name xml:lang="en"><surname>Kaigorodova</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Кайгородова</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Evgeniya Viktorovna Kaigorodova.</p><p>5, Kooperativnyy St., Tomsk 634009; 2, Mosсovskiy Trakt, Tomsk 634050.</p></bio><bio xml:lang="ru"><p>Кайгородова Евгения Викторовна.</p><p>634050 Томск, пер. Кооперативный, 5; 634050 Томск, Московский тракт, 2.</p></bio><email>zlobinae@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6826-725X</contrib-id><name-alternatives><name xml:lang="en"><surname>Kovalev</surname><given-names>O.  V.</given-names></name><name xml:lang="ru"><surname>Ковалев</surname><given-names>О. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>2, Mosсovskiy Trakt, Tomsk 634050.</p></bio><bio xml:lang="ru"><p>634050 Томск, Московский тракт, 2.</p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8194-2811</contrib-id><name-alternatives><name xml:lang="en"><surname>Chernyshova</surname><given-names>A. L. </given-names></name><name xml:lang="ru"><surname>Чернышова</surname><given-names>А. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5, Kooperativnyy St., Tomsk 634009.</p></bio><bio xml:lang="ru"><p>634050 Томск, пер. Кооперативный, 5.</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1195-4008</contrib-id><name-alternatives><name xml:lang="en"><surname>Vtorushin</surname><given-names>S. V.</given-names></name><name xml:lang="ru"><surname>Вторушин</surname><given-names>С. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5, Kooperativnyy St., Tomsk 634009; 2, Mosсovskiy Trakt, Tomsk 634050.</p></bio><bio xml:lang="ru"><p>634050 Томск, пер. Кооперативный, 5; 634050 Томск, Московский тракт, 2.</p></bio><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0617-4688</contrib-id><name-alternatives><name xml:lang="en"><surname>Shpileva</surname><given-names> O.  V.</given-names></name><name xml:lang="ru"><surname>Шпилёва</surname><given-names>О. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5, Kooperativnyy St., Tomsk 634009.</p></bio><bio xml:lang="ru"><p>634050 Томск, пер. Кооперативный, 5.</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Cancer Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт онкологии ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Siberian State Medical University</institution></aff><aff><institution xml:lang="ru">Сибирский государственный медицинский университет Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-12-20" publication-format="electronic"><day>20</day><month>12</month><year>2021</year></pub-date><volume>17</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>90</fpage><lpage>95</lpage><history><date date-type="received" iso-8601-date="2022-01-19"><day>19</day><month>01</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-01-19"><day>19</day><month>01</month><year>2022</year></date></history><permissions><copyright-year>2021</copyright-year><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://ojrs.abvpress.ru/ojrs/article/view/890">https://ojrs.abvpress.ru/ojrs/article/view/890</self-uri><abstract xml:lang="en"><p>Ovarian cancer is one of the most malignant and aggressive tumors of the female reproductive system. Late diagnosis is one of the most significant problems: more than two-thirds of cases are detected only at stage III–IV. Ovarian cancer is characterized by a unique metastatic process. Implantation is the earliest and most common way of metastasis. It is often accompanied by fluid accumulation in the abdominal cavity, known as ascites. We report a case of low-grade serous ovarian carcinoma with a large heterogeneity of tumor cells in the ascitic fluid detected using multicolor flow cytometry. We demonstrated the advantages and benefits of this method in the diagnosis of ovarian cancer. Multicolor flow cytometry opens new horizons for liquid biopsy in oncology.</p></abstract><trans-abstract xml:lang="ru"><p>Рак яичников (Ря) – одна из наиболее злокачественных и агрессивно протекающих опухолей женской репродуктивной системы. Одной из наиболее актуальных проблем является поздняя диагностика Ря: согласно статистическим данным, более 2/3 всех случаев заболевания выявляются лишь на III–IV стадии. Ря характеризуется уникальным метастатическим процессом. самый ранний и наиболее распространенный путь метастазирования – имплантационный. Он часто сопровождается накоплением в брюшной полости жидкости, называемым асцитом. В данном клиническом случае отражена большая гетерогенность опухолевых клеток в асцитической жидкости пациентки с low-grade серозной карциномой яичников, выявленной с помощью многоцветной проточной цитометрии. Показаны преимущество и польза данного метода в диагностике Ря. Применение многоцветной проточной цитометрии открывает большие возможности для развития жидкостной биопсии в онкологии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>low-grade ovarian serous carcinoma</kwd><kwd>ascitic tumor cells</kwd><kwd>tumor heterogeneity</kwd><kwd>EpCAM</kwd><kwd>multicolor flow cytometry</kwd><kwd>liquid biopsy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>low-grade серозная карцинома яичников</kwd><kwd>асцитические опухолевые клетки</kwd><kwd>опухолевая гетерогенность</kwd><kwd>EpCAM</kwd><kwd>многоцветная проточная цитометрия</kwd><kwd>жидкостная биопсия</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was funded by grant of the President of the Russian Federation MD-2017.2020.7. The authors are grateful to The Core Facility “Medical genomics”, Tomsk National Research Medical Center of the Russian Academy of Sciences for the opportunity to use scientific equipment.</funding-statement><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке гранта Президента РФ МД-2017.2020.7. Авторы выражают благодарность Центру коллективного пользования «Медицинская геномика» ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук» за возможность использования научного оборудования.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Malignant tumors in Russia in 2018 (incidence and mortality). Ed. by A.D. Kaprin, V.V. Starinskiy, G.V. Petrova. Moscow: P.A. Herzen Moscow Oncology Research Institute – a branch of the National Medical Research Center of Radiology, Ministry of Health of Russia, 2019. 250 p. 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