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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">Surgery and Oncology</journal-id><journal-title-group><journal-title xml:lang="en">Surgery and Oncology</journal-title><trans-title-group xml:lang="ru"><trans-title>Хирургия и онкология</trans-title></trans-title-group></journal-title-group><issn publication-format="electronic">2949-5857</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">887</article-id><article-id pub-id-type="doi">10.17650/2949-5857-2025-15-4-69-75</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL REPORT</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНОЕ ИССЛЕДОВАНИЕ</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">Long-term outcomes in young patients with breast cancer. Multicenter, matched-cohort study</article-title><trans-title-group xml:lang="ru"><trans-title>Отдаленные результаты лечения больных раком молочной железы молодого возраста. Многоцентровое когортное исследование с применением метода псевдорандомизации</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-4786-6863</contrib-id><name-alternatives><name xml:lang="en"><surname>Memetov</surname><given-names>K. U.</given-names></name><name xml:lang="ru"><surname>Меметов</surname><given-names>Х. У.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1710-0772</contrib-id><name-alternatives><name xml:lang="en"><surname>Parokonnaya</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Пароконная</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2543-9637</contrib-id><name-alternatives><name xml:lang="en"><surname>Makarov</surname><given-names>E. S.</given-names></name><name xml:lang="ru"><surname>Макаров</surname><given-names>Е. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6706-4832</contrib-id><name-alternatives><name xml:lang="en"><surname>Suravatkin</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Сураваткин</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8461-9243</contrib-id><name-alternatives><name xml:lang="en"><surname>Izmaylov</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Измайлов</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-1102-0915</contrib-id><name-alternatives><name xml:lang="en"><surname>Kuzmenko</surname><given-names>M. Y.</given-names></name><name xml:lang="ru"><surname>Кузьменко</surname><given-names>М. Я.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0899-0809</contrib-id><name-alternatives><name xml:lang="en"><surname>Pavlova</surname><given-names>V. I.</given-names></name><name xml:lang="ru"><surname>Павлова</surname><given-names>В. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7210-3020</contrib-id><name-alternatives><name xml:lang="en"><surname>Zukov</surname><given-names>R. A.</given-names></name><name xml:lang="ru"><surname>Зуков</surname><given-names>Р. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3028-7578</contrib-id><name-alternatives><name xml:lang="en"><surname>Ivanov</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Иванов</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1833-1687</contrib-id><name-alternatives><name xml:lang="en"><surname>Fedorov</surname><given-names>N. M.</given-names></name><name xml:lang="ru"><surname>Федоров</surname><given-names>Н. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff6"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7514-280X</contrib-id><name-alternatives><name xml:lang="en"><surname>Petrovskiy</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Петровский</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>xusan_memetov77@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff7"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Republican Clinical Oncological Dispensary, Ministry of Health of the Republic of Bashkortostan</institution></aff><aff><institution xml:lang="ru">ГАУЗ «Республиканский клинический онкологический диспансер» Минздрава Республики Башкортостан</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Multidisciplinary Clinical Medical Center “Medical City”</institution></aff><aff><institution xml:lang="ru">ГАУЗ Тюменской области «Многопрофильный клинический медицинский центр «Медицинский город»</institution></aff></aff-alternatives><aff-alternatives id="aff4"><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><aff-alternatives id="aff5"><aff><institution xml:lang="en">V.F. Voyno-Yasenetskiy Krasnoyarsk State Medical University, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Красноярский государственный медицинский университет им. проф. В.Ф. Войно-Ясенецкого» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff6"><aff><institution xml:lang="en">Туumen 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><aff-alternatives id="aff7"><aff><institution xml:lang="en">I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО Первый Московский государственный медицинский университет им. И.М. Сеченова Минздрава России (Сеченовский Университет)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-12-21" publication-format="electronic"><day>21</day><month>12</month><year>2025</year></pub-date><volume>15</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>69</fpage><lpage>75</lpage><history><date date-type="received" iso-8601-date="2025-12-21"><day>21</day><month>12</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-12-21"><day>21</day><month>12</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, ABV-press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, АБВ-пресс</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">ABV-press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</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://onco-surgery.info/jour/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://onco-surgery.info/jour/article/view/887">https://onco-surgery.info/jour/article/view/887</self-uri><abstract xml:lang="en"><p><bold>Background.</bold> Despite existing clinical guidelines, representative data on breast cancer outcomes in patients aged 25 years and younger remain limited.</p> <p><bold>Aim.</bold> To analyze long-term survival in this age group.</p> <p><bold>Materials and methods.</bold> We conducted a retrospective, multicenter study that included patients treated between 2008 and 2020. From 552 tracked cases, 2 groups matched by disease stage and tumor molecular subtypes were formed using 1:2 pseudo-randomization: the study group (<italic>n</italic> = 63, age ≤ 25 years) and the control group (<italic>n</italic> = 126, age &gt; 25 years). The distribution of clinical stages was identical in both groups: in the study group, stage IA was observed in 11 patients (17.5 %), IIA in 18 (28.6 %), IIB in 13 (20.6 %), IIIA in 6 (9.5 %), IIIB in 7 (11.1 %), and IIIC in 8 (12.7 %); in the control group the corresponding numbers were 22, 36, 26, 12, 14, and 16 cases, respectively (the same proportions). Overall survival and recurrence-free survival (RFS) were assessed.</p> <p><bold>Results.</bold> The analysis revealed a statistically significant decrease in RFS in the group of young patients. The median RFS was 73.9 months compared to 82.8 months in the control group, which is consistent with the survival analysis results (<italic>p</italic> = 0.027). The 5-year RFS was significantly lower – 55.7 % <italic>versus</italic> 77.1 %, and the 10-year RFS was 36.3 % <italic>versus</italic> 49.8 % (<italic>p</italic> = 0.027). Regarding overall survival, although the median and 5-year survival rates in the ≤ 25 years group were also lower (149.7 months and 79 % <italic>versus</italic> 157.3 months and 89 %, respectively), the difference did not reach statistical significance (<italic>p</italic> = 0.229).</p> <p><bold>Conclusion.</bold> Patients with breast cancer aged ≤ 25 years have significantly lower recurrence-free survival, confirming the concept of more aggressive disease course in young age, likely associated with adverse biological features of the tumors. These findings underscore the need to identify modifiable prognostic factors and develop more effective treatment strategies for this patient category.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Несмотря на существующие клинические рекомендации, репрезентативные данные об исходах рака молочной железы у пациенток 25 лет и младше остаются ограниченными.</p> <p><bold>Цель исследования</bold> – анализ отдаленной выживаемости в этой возрастной группе.</p> <p><bold>Материалы и методы.</bold> Проведено ретроспективное многоцентровое исследование, включившее пациенток, лечившихся в период с 2008 по 2020 г. Из 552 прослеженных случаев методом псевдорандомизации 1:2 сформированы 2 сопоставимые группы, сбалансированные по стадии заболевания и молекулярным подтипам опухоли: основная (<italic>n</italic> = 63, возраст 25 лет и младше) и контрольная (<italic>n</italic> = 126, возраст старше 25 лет). Распределение по клиническим стадиям было идентичным в обеих группах: в основной группе стадия IA отмечена у 11 (17,5 %) пациенток, IIA – у 18 (28,6 %), IIB – у 13 (20,6 %), IIIA – у 6 (9,5 %), IIIB – у 7 (11,1 %), IIIC – у 8 (12,7 %). В контрольную группу включили соответственно 22, 36, 26, 12, 14 и 16 больных (те же доли). Оценивали показатели общей и безрецидивной выживаемости (БРВ).</p> <p><bold>Результаты.</bold> Анализ показал статистически значимое снижение БРВ в группе молодых пациенток. Медиана БРВ составила 73,9 мес против 82,8 мес в контрольной группе, что согласуется с результатами анализа выживаемости по данным литературы (<italic>p</italic> = 0,027). Пятилетняя БРВ была достоверно ниже – 55,7 % против 77,1 %, 10-летняя – 36,3 % против 49,8 % (<italic>р</italic> = 0,027). Что касается общей выживаемости, хотя медиана и 5-летняя выживаемость в группе до 25 лет также были ниже (149,7 мес и 79 % против 157,3 мес и 89 %), разница не достигла статистической значимости (<italic>р</italic> = 0,229).</p> <p><bold>Выводы.</bold> Пациентки с раком молочной железы в возрасте младше 25 лет имеют достоверно более низкую БРВ, что подтверждает представление о более агрессивном течении заболевания в молодом возрасте, вероятно, связанном с неблагоприятными биологическими особенностями опухолей. Полученные данные подчеркивают необходимость поиска модифицируемых факторов прогноза и разработки более эффективных стратегий лечения для этой категории больных.</p></trans-abstract><kwd-group xml:lang="en"><kwd>breast cancer</kwd><kwd>young age</kwd><kwd>overall survival</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рак молочной железы</kwd><kwd>молодой возраст</kwd><kwd>общая выживаемость</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">Agaeva A.V., Svetlakova A.V., Gromov D.D. et al. Population factors predicting survival in breast cancer: analysis according to the data of the Arkhangelsk Regional Cancer Registry in 2000–2020. Opukholi zhenskoy reproduktivnoy sistemy = Tumors of Female Reproductive System 2023;19(1):38–47. (In Russ.). 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