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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">1407</article-id><article-id pub-id-type="doi">10.17650/1994-4098-2025-21-3-65-67</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>MAMMOLOGY. CLINICAL CASE</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>МАММОЛОГИЯ. 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">Are menses always necessary for pregnancy in patients with breast cancer?</article-title><trans-title-group xml:lang="ru"><trans-title>Всегда ли нужны менструации для наступления беременности у больных раком молочной железы?</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-4392-0700</contrib-id><name-alternatives><name xml:lang="en"><surname>Sheremet</surname><given-names>M. Yu.</given-names></name><name xml:lang="ru"><surname>Шеремет</surname><given-names>М. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Marina Yuryevna Sheremet</p><p>Build. 2, 4 Ilyushina St., Saint Petersburg 196634</p></bio><bio xml:lang="ru"><p>Марина Юрьевна Шеремет </p><p>196634 Санкт-Петербург, ул. Ильюшина, 4, корп. 2</p></bio><email>sheremet-my@avaclinic.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7930-8048</contrib-id><name-alternatives><name xml:lang="en"><surname>Protasova</surname><given-names>A. E.</given-names></name><name xml:lang="ru"><surname>Протасова</surname><given-names>А. Э.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Build. 2, 4 Ilyushina St., Saint Petersburg 196634</p><p>7–9 Universitetskaya Naberezhnaya, Saint Petersburg 199034</p><p>2 Akkuratova St., Saint Petersburg 197341</p></bio><bio xml:lang="ru"><p>196634 Санкт-Петербург, ул. Ильюшина, 4, корп. 2</p><p>199034 Санкт-Петербург, Уни<italic>197341 У</italic>верситетская набережная, 7–9</p><p>197341 Санкт-Петербург, ул. Аккуратова, 2</p></bio><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-4164-2372</contrib-id><name-alternatives><name xml:lang="en"><surname>Turomsha</surname><given-names>A. N.</given-names></name><name xml:lang="ru"><surname>Туромша</surname><given-names>А. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Build. 2, 4 Ilyushina St., Saint Petersburg 196634</p></bio><bio xml:lang="ru"><p>196634 Санкт-Петербург, ул. Ильюшина, 4, корп. 2</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">AVA-PETER LLC</institution></aff><aff><institution xml:lang="ru">ООО «АВА-ПЕТЕР»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Saint Petersburg State University</institution></aff><aff><institution xml:lang="ru">ФБОУ ВО «Санкт-Петербургский государственный университет»</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">V.A. Almazov National Medical Research Centre, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр им. В.А. Алмазова» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-11-21" publication-format="electronic"><day>21</day><month>11</month><year>2025</year></pub-date><volume>21</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>65</fpage><lpage>67</lpage><history><date date-type="received" iso-8601-date="2025-11-21"><day>21</day><month>11</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-11-21"><day>21</day><month>11</month><year>2025</year></date></history><permissions><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/1407">https://ojrs.abvpress.ru/ojrs/article/view/1407</self-uri><abstract xml:lang="en"><p>A clinical case of pregnancy in a patient with breast cancer during adjuvant hormonal therapy with tamoxifen is presented. The patient underwent combined treatment: neoadjuvant chemotherapy with ovarian suppression, organpreserving surgery, radiation therapy and further hormonal therapy after the cancellation of ovarian suppression. The clinical case emphasizes the need to inform patients about the risk of pregnancy without restoration of menstrual function during tamoxifen intake and the importance of reliable contraception.</p></abstract><trans-abstract xml:lang="ru"><p>Представлен клинический случай наступления беременности у больной раком молочной железы на фоне адъювантной гормонотерапии тамоксифеном. Пациентке было проведено комбинированное лечение: неоадъювантная химиотерапия с овариальной супрессией, органосохраняющая операция, лучевая терапия и дальнейшая гормонотерапия после отмены овариальной супрессии. Клинический случай подчеркивает необходимость информирования пациенток о риске наступления беременности без восстановления менструальной функции на фоне приема тамоксифена и важность надежной контрацепции.</p></trans-abstract><kwd-group xml:lang="en"><kwd>breast cancer</kwd><kwd>pregnancy</kwd><kwd>tamoxifen</kwd><kwd>chemotherapy</kwd><kwd>hormone therapy</kwd><kwd>ovarian suppression</kwd><kwd>amenorrhea</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рак молочной железы</kwd><kwd>беременность</kwd><kwd>тамоксифен</kwd><kwd>химиотерапия</kwd><kwd>гормонотерапия</kwd><kwd>овариальная супрессия</kwd><kwd>аменорея</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">Gynecology: national guidelines. Eds.: G.M. Savelyeva, G.T. Sukhikh, V.N. Serova et al. 2nd edn., revised. Moscow: GEOTAR-Media, 2020. 1008 p. 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