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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">762</article-id><article-id pub-id-type="doi">10.17650/1994-4098-2020-16-3-18-24</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>MAMMOLOGY. ORIGINAL REPORTS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>МАММОЛОГИЯ. ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Role of positron emission tomography in predicting early tumor response to neoadjuvant chemotherapy for breast cancer</article-title><trans-title-group xml:lang="ru"><trans-title>Роль позитронно-эмисcионной томографии в прогнозировании раннего ответа опухоли на неоадъювантную химиотерапию рака молочной железы</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7079-4067</contrib-id><name-alternatives><name xml:lang="en"><surname>Chanchikova</surname><given-names>N. G.</given-names></name><name xml:lang="ru"><surname>Чанчикова</surname><given-names>Н. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>26 Kolomenskaya St., Krasnoyarsk 660037</p></bio><bio xml:lang="ru"><p>660037 Красноярск, ул. Коломенская, 26</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3179-1381</contrib-id><name-alternatives><name xml:lang="en"><surname>Karlova</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Карлова</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>26 Kolomenskaya St., Krasnoyarsk 660037</p></bio><bio xml:lang="ru"><p>660037 Красноярск, ул. Коломенская, 26</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7013-1143</contrib-id><name-alternatives><name xml:lang="en"><surname>Savelyeva</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Савельева</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>26 Kolomenskaya St., Krasnoyarsk 660037</p></bio><bio xml:lang="ru"><p>660037 Красноярск, ул. Коломенская, 26</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5280-943X</contrib-id><name-alternatives><name xml:lang="en"><surname>Silkina</surname><given-names>O. A.</given-names></name><name xml:lang="ru"><surname>Силкина</surname><given-names>О. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>26 Kolomenskaya St., Krasnoyarsk 660037</p></bio><bio xml:lang="ru"><p>660037 Красноярск, ул. Коломенская, 26</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8753-7916</contrib-id><name-alternatives><name xml:lang="en"><surname>Chernov</surname><given-names>V. I.</given-names></name><name xml:lang="ru"><surname>Чернов</surname><given-names>В. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5 Kooperativny Pereulok, Tomsk 63400930 Lenina Avenue, Tomsk 634050</p></bio><bio xml:lang="ru"><p>634009 Томск, переулок Кооперативный, 5634050 Томск, проспект Ленина, 30</p></bio><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/0000-0002-4568-1781</contrib-id><name-alternatives><name xml:lang="en"><surname>Zelchan</surname><given-names>R. V.</given-names></name><name xml:lang="ru"><surname>Зельчан</surname><given-names>Р. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5 Kooperativny Pereulok, Tomsk 63400930 Lenina Avenue, Tomsk 634050</p></bio><bio xml:lang="ru"><p>634009 Томск, переулок Кооперативный, 5634050 Томск, проспект Ленина, 30</p></bio><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/0000-0001-5281-7758</contrib-id><name-alternatives><name xml:lang="en"><surname>Bragina</surname><given-names>O. D.</given-names></name><name xml:lang="ru"><surname>Брагина</surname><given-names>О. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5 Kooperativny Pereulok, Tomsk 63400930 Lenina Avenue, Tomsk 634050</p></bio><bio xml:lang="ru"><p>634009 Томск, переулок Кооперативный, 5634050 Томск, проспект Ленина, 30</p></bio><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/0000-0002-5840-3625</contrib-id><name-alternatives><name xml:lang="en"><surname>Medvedeva</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Медведева</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5 Kooperativny Pereulok, Tomsk 634009</p></bio><bio xml:lang="ru"><p>Анна Александровна Медведева</p><p>634009 Томск, переулок Кооперативный, 5</p></bio><email>medvedeva@tnimc.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Federal Siberian Research and Clinical Center of the Federal Medical and Biological Agency</institution></aff><aff><institution xml:lang="ru">ФГБУ «Федеральный Сибирский научно-клинический центр Федерального медико-биологического агентства»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Tomsk National Research Medical Center, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук»</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">National Research Tomsk State University</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО «Национальный исследовательский Томский политехнический университет»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-12-01" publication-format="electronic"><day>01</day><month>12</month><year>2020</year></pub-date><volume>16</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>18</fpage><lpage>24</lpage><history><date date-type="received" iso-8601-date="2021-01-12"><day>12</day><month>01</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-01-12"><day>12</day><month>01</month><year>2021</year></date></history><permissions><copyright-year>2020</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/762">https://ojrs.abvpress.ru/ojrs/article/view/762</self-uri><abstract xml:lang="en"><p><bold>Background</bold>. Neoadjuvant chemotherapy (NACT) is an important stage in the treatment of patients with breast cancer. Positron emission tomography/computed tomography (PET/СT) with fluorodeoxyglucose labeled with <sup>18</sup>F (<sup>18</sup>F-FDG) is widely used as an effective method of metabolic tumor imaging at the stages of treatment. The aim of this study was to evaluate the possibility of using PET/CT with <sup>18</sup>F-FDG to determine the early tumor response to NACT.</p><p><bold>Materials and methods</bold>. The results of PET/CT with <sup>18</sup>F-FDG in 27 patients with breast cancer were retrospectively analyzed. The study was performed before the start of NACT, after the 2<sup>nd</sup> cycle of chemotherapy and after completion of all courses, the maximum accumulation of <sup>18</sup>F-FDG in the tumor tissue (SUV<sub>max</sub>), as well as the dynamics of changes in SUV<sub>max</sub> after NACT (SUV(%)) were assessed. According to the results of postoperative morphological examination, the patients were divided into two groups: with complete tumor regression (pCR) and with no complete tumor regression (non-pCR).</p><p><bold>Results</bold>. The results of the study showed that the SUV(%) between the primary and interim examination, as well as between the intermediate and preoperative PET/CT scans, was 66.6 ± 13.3 % and 31.6 ± 17.5 %, respectively. The dynamics of SUV(%) between the primary and intermediate scans in the pCR and non-pCR groups was 79.04 ± 4.1 % and 63.8 ± 13.1 %, respectively (<italic>p</italic> = 0.02). The SUV<sub>max</sub> value in the pCR and non-pCR groups during the primary PET/CT scan was 8.5 ± 0.78 and 8.2 ± 0.78, respectively (<italic>p</italic> = 0.5), while the intermediate scan was 1.8 ± 0.35 and 3.0 ± 0.14 (<italic>p</italic> = 0.03). Based on the research results, an ROC analysis was carried out, which showed that the optimal value of SUV(%) is 73.55 %, which showed the highest sensitivity and specificity.</p><p><bold>Discussion</bold>. Given that the change in SUV<sub>max</sub> between primary and intermediate PET/CT was more pronounced than between intermediate and preoperative scans, it can be assumed that metabolic changes in the background of NACT are observed already in the early stages of treatment and persist until the end of therapy, thus, the ineffectiveness of the chemotherapy regimen can be determined using an intermediate PET/CT scan and a timely change in the treatment plan.</p><p><bold>Conclusions</bold>. We consider 73.55 % to be the optimal value of SUV(%) for intermediate PET/CT scanning; for this indicator and above, it is expected to expect a complete morphological response of the tumor to NACT. We believe that PET/CT with <sup>18</sup>F-FDG at an intermediate stage of observation during NACT is a valuable method for predicting early tumor response to therapy.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение</bold>. Неоадъювантная химиотерапия (НАХТ) является важным этапом лечения больных раком молочной железы. В качестве эффективного метода метаболической визуализации опухоли на этапах лечения широко используется совмещенная с компьютерной томографией позитронно-эмиссионная томография (ПЭТ/КТ) с фтордезоксиглюкозой, меченной <sup>18</sup>F (<sup>18</sup>F-ФДГ). Целью данного исследования была оценка возможности использования ПЭТ/КТ с <sup>18</sup>F-ФДГ для определения раннего ответа опухоли на НАХТ.</p><p><bold>Материалы и методы</bold>. Ретроспективно были проанализированы результаты ПЭТ/КТ с <sup>18</sup>F-ФДГ 27 больных раком молочной железы. Исследование выполняли до начала НАХТ, после 2-го цикла НАХТ и после завершения всех курсов. Оценивали максимальное накопление <sup>18</sup>F-ФДГ в опухолевой ткани (SUV<sub>max</sub>) и динамику изменения SUV<sub>max</sub> после проведения НАХТ (SUV(%)). По результатам послеоперационного морфологического исследования пациентки были разделены на 2 группы: с полным регрессом опухоли и без полного регресса опухоли.</p><p><bold>Результаты</bold>. Результаты исследования показали, что значение SUV(%) между первичным и промежуточным исследованием, а также между промежуточной и предоперационной ПЭТ/КТ составило 66,6 ± 13,3 и 31,6 ± 17,5 % соответственно. Динамика SUV(%) между первичной и промежуточной ПЭТ/КТ в группах с полным регрессом опухоли и без полного регресса опухоли составила 79,04 ± 4,1 и 63,8 ± 13,1 % соответственно (<italic>р</italic> = 0,02). Значение SUV<sub>max</sub> в группах с полным регрессом опухоли и без полного регресса опухоли при первичной ПЭТ/КТ составило 8,5 ± 0,78 и 8,2 ± 0,78 соответственно (<italic>р</italic> = 0,5), при промежуточной – 1,8 ± 0,35 и 3,0 ± 0,14 (<italic>р</italic> = 0,03). По результатам исследований был проведен ROC-анализ, который показал, что оптимальным значением SUV(%) является 73,55 %, показавшее наибольшую чувствительность и специфичность.</p><p><bold>Обсуждение</bold>. Учитывая, что изменение SUV<sub>max</sub> между первичной и промежуточной ПЭТ/КТ было более выраженным, чем между промежуточной и предоперационной ПЭТ/КТ, можно полагать, что метаболические изменения на фоне НАХТ наблюдаются уже на ранних этапах лечения и сохраняются до окончания терапии, таким образом, неэффективность схемы химиотерапии можно определить, используя промежуточную ПЭТ/КТ, и своевременно изменить план лечения.</p><p><bold>Выводы</bold>. Оптимальным значением SUV(%) при промежуточной ПЭТ/КТ мы считаем показатель 73,55 %; при данном показателе и выше предполагается ожидать полный морфологический ответ опухоли на НАХТ. Мы полагаем, что ПЭТ/КТ с <sup>18</sup>F-ФДГ на промежуточном этапе наблюдения в процессе НАХТ является ценным методом прогнозирования раннего ответа опухоли на терапию.</p></trans-abstract><kwd-group xml:lang="en"><kwd>breast cancer</kwd><kwd>positron emission tomography</kwd><kwd>neoadjuvant chemotherapy</kwd><kwd>morphological response</kwd><kwd>prognosis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рак молочной железы</kwd><kwd>позитронная эмиссионная томография</kwd><kwd>неоадъювантная химиотерапия</kwd><kwd>морфологический ответ</kwd><kwd>прогноз</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Rastogi P., Anderson S.J., Bear H.D. at al. 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