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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">Oncopathology</journal-id><journal-title-group><journal-title xml:lang="en">Oncopathology</journal-title><trans-title-group xml:lang="ru"><trans-title>Онкопатология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2618-7019</issn><issn publication-format="electronic">3034-3534</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">708445</article-id><article-id pub-id-type="doi">10.17650/2618-7019-2021-4-3-4-45-51</article-id><article-id pub-id-type="edn">GLPRZS</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Case from practice</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Случай из практики</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">Primary breast angiosarcoma: diagnostic challenges</article-title><trans-title-group xml:lang="ru"><trans-title>Первичная ангиосаркома молочной железы: проблемы диагностики</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kudaybergenova</surname><given-names>Asel Galimovna</given-names></name><name xml:lang="ru"><surname>Кудайбергенова</surname><given-names>Асель Галимовна</given-names></name></name-alternatives><email>asel1972@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gogolev</surname><given-names>A. B.</given-names></name><name xml:lang="ru"><surname>Гоголев</surname><given-names>А. Б.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Artemyeva</surname><given-names>E. S.</given-names></name><name xml:lang="ru"><surname>Артемьева</surname><given-names>Е. С.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gorban</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Горбань</surname><given-names>Н. А.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N.N. Petrov 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. Петрова» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Central Clinical Hospital with Polyclinic, Administration of the President of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГБУ«Центральная клиническая больница с поликлиникой» Управления делами Президента Российской Федерации</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-03-14" publication-format="electronic"><day>14</day><month>03</month><year>2022</year></pub-date><volume>4</volume><issue>3-4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>45</fpage><lpage>51</lpage><history><date date-type="received" iso-8601-date="2026-06-09"><day>09</day><month>06</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, ABV-Press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, АБВ-пресс</copyright-statement><copyright-year>2026</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://oncopathology.abvpress.ru/2618-7019/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://oncopathology.abvpress.ru/2618-7019/article/view/708445">https://oncopathology.abvpress.ru/2618-7019/article/view/708445</self-uri><abstract xml:lang="en"><p>Primary breast sarcomas (except malignant phylloid tumors) are exceedingly rare tumors that account for less than 0.1 % of all malignant breast tumors. Approximately 25 % of all primary breast sarcomas are angiosarcomas. In this article, we report two cases of primary angiosarcoma and discuss challenges of its differential diagnosis.</p></abstract><trans-abstract xml:lang="ru"><p>Первичные саркомы молочной железы (за исключением злокачественных филлоидных (листовидных) опухолей) являются чрезвычайно редкими опухолями, составляющими менее 0,1 % всех злокачественных опухолей молочной железы, а среди всех первичных сарком молочной железы ангиосаркома составляет около 25 %. в статье приведены 2 клинических случая первичной ангиосаркомы, рассмотрены вопросы ее дифференциальной диагностики.</p></trans-abstract><kwd-group xml:lang="en"><kwd>primary breast angiosarcoma</kwd><kwd>differential diagnosis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>первичная ангиосаркома молочной железы</kwd><kwd>дифференциальный диагноз</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Adem C., Reynolds C., Ingle J.N. et al. 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