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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">ojrdrt</journal-id><journal-title-group><journal-title xml:lang="ru">Онкологический журнал: лучевая диагностика, лучевая терапия</journal-title><trans-title-group xml:lang="en"><trans-title>Journal of oncology: diagnostic radiology and radiotherapy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2587-7593</issn><issn pub-type="epub">2713-167X</issn><publisher><publisher-name>НЕКОММЕРЧЕСКОЕ ПАРТНЕРСТВО «ОБЩЕСТВО ИНТЕРВЕНЦИОННЫХ ОНКОРАДИОЛОГОВ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.37174/2587-7593-2021-4-3-44-55</article-id><article-id custom-type="elpub" pub-id-type="custom">ojrdrt-193</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЛУЧЕВАЯ ДИАГНОСТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DIAGNOSTIC RADIOLOGY</subject></subj-group></article-categories><title-group><article-title>Возможности диффузионно-взвешенной МРТ в дифференциальной диагностике ранних рецидивов забрюшинных липосарком и послеоперационных изменений</article-title><trans-title-group xml:lang="en"><trans-title>Possibilities of Diffusion-Weighted MRI in the Differential Diagnosis of Early Recurrences of Retroperitoneal Liposarcomas and Postoperative Changes</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1563-0983</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колобанова</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolobanova</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>врач-рентгенолог,</p><p>115478, Москва, Каширское шоссе, 24</p></bio><bio xml:lang="en"><p>24 Kashirskoe Highway, Moscow, Russia 115478</p></bio><email xlink:type="simple">evgesha.16.kolobanova@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1779-003X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Медведева</surname><given-names>Б. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Medvedeva</surname><given-names>B. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ведущий научный сотрудник, заведующая рентгенодиагностическим отделением, доктор медицинских наук, </p><p>115478, Москва, Каширское шоссе, 24</p></bio><bio xml:lang="en"><p>24 Kashirskoe Highway, Moscow, Russia 115478</p></bio><email xlink:type="simple">m-diagnostica@yandex.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.N. Blokhin National Medical Research Center of Oncology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>29</day><month>09</month><year>2021</year></pub-date><volume>4</volume><issue>3</issue><fpage>44</fpage><lpage>55</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Колобанова Е.С., Медведева Б.М., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Колобанова Е.С., Медведева Б.М.</copyright-holder><copyright-holder xml:lang="en">Kolobanova E.S., Medvedeva B.M.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.oncoradjournal.ru/jour/article/view/193">https://www.oncoradjournal.ru/jour/article/view/193</self-uri><abstract><sec><title>Цель</title><p>Цель: Оценка МРТ с внутривенным контрастированием и методики ДВ‑МРТ в выявлении и дифференциальной диагностике рецидивов забрюшинных липосарком (ЛС) с послеоперационными изменениями.</p></sec><sec><title>Материал и методы</title><p>Материал и методы: В основу работы положены данные ретроспективного исследования 23 пациентов, ранее прооперированных по поводу забрюшинных неорганных ЛС в период с 2016 по 2020 гг. Всем пациентам выполнялась МРТ органов брюшной полости и малого таза с внутривенным контрастным усилением с дальнейшей оценкой размеров, формы, структуры и особенностей накопления контрастного препарата в выявленном образовании. При анализе ДВ‑МРТ и ИКД-карт оценивались две области — первая область интереса включала среднее значение всего предполагаемого поражения, в то время как вторая — ограниченную зону диффузии на ДВ-изображениях и на ИКД-картах.</p></sec><sec><title>Результаты</title><p>Результаты: Морфологические исследования были выполнены 17 пациентам (74 %), в 6 случаях (26 %) пациенты были оставлены на динамический контроль в течение 1–3 лет. Местные рецидивы были выявлены у 16 пациентов (67 %), послеоперационные изменения — у 7 (33 %) пациентов, из них в 2 случаях определялась деформация жировой клетчатки и фиброзные изменения в области оперативного вмешательства, у 3 пациентов были выявлены гранулемы, и еще у двух пациентов — заворот большого сальника и лимфоцеле. Чувствительность МРТ с внутривенным контрастированием составила 68,7 %, специфичность 71,4 % и точность 69,6 %. Добавление ДВИ в стандартный протокол МРТ у пациентов с подозрением на рецидив забрюшинной ЛС позволило повысить чувствительность метода в дифференциальной диагностике рецидивов ЛС от послеоперационных изменений до 93,7 % (15 из 16), специфичность — до 100 % (7 из 7) и точность — до 95,6 % (22 из 23).</p></sec><sec><title>Заключение</title><p>Заключение: Сочетанное использование МРТ с внутривенным контрастированием и ДВ‑МРТ повышает точность выявления и дифференциальной диагностики рецидивных опухолей мелких размеров при дедифференцированной и миксоидных типах липосарком с послеоперационными изменениями. </p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Purpose</title><p>Purpose: To evaluate contrast-enhanced magnetic resonance imaging (CE‑MRI) and diffusion-weighted (DWI) in the detection and differential diagnosis of recurrent of retroperitoneal liposarcomas with postoperative changes.</p></sec><sec><title>Material and methods</title><p>Material and methods: The retrospective study included of 23 patients previously operated on for retroperitoneal inorganic liposarcomas. All patients underwent MRI of the abdominal cavity and pelvis with intravenous contrast with further assessment of the size, shape, structure and characteristics of the accumulation of contrast agent in the detected formation.</p></sec><sec><title>Results</title><p>Results: Morphological verification were performed in 17 patients (74 %), in 6 cases (26 %) patients were left for dynamic control for 1–3 years. Local relapses were detected in 16 patients (67 %), postoperative changes — in 7 (33 %) patients, of which in 2 cases deformation of adipose tissue and fibrotic changes in the area of surgery was determined, in 3 patients granulomas were revealed, and in two patients — volvulus of the greater omentum and lymphocele. The sensitivity of MRI with intravenous contrast enhancement was 68.7 %, specificity 71.4 % and accuracy 69.6 %. The addition of DWI to the standard MRI protocol in patients with suspected recurrence of retroperitoneal liposarcoma to increase the sensitivity of the method in the differential diagnosis of recurrent drugs from postoperative changes to 93.7 % (15 out of 16), specificity up to 100 % (7 out of 7) and accuracy up to 95.6 % (22 out of 23).</p></sec><sec><title>Conclusion</title><p>Conclusion: The joint use of MRI with intravenous contrast and DW‑MRI increases the information content in the detection and differential diagnosis of small-sized recurrent tumors in dedifferentiated and myxoid types of liposarcomas with postoperative changes. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>МРТ</kwd><kwd>ДВ-изображения</kwd><kwd>ИКД-карты</kwd><kwd>рецидивы липосарком</kwd></kwd-group><kwd-group xml:lang="en"><kwd>MRI</kwd><kwd>diffusion-weighted imaging</kwd><kwd>ADC</kwd><kwd>recurrence of liposarcoma</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Liles JS, Tzeng CW, Short J.J. et al. 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