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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">Almanac of Clinical Medicine</journal-id><journal-title-group><journal-title xml:lang="en">Almanac of Clinical Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Альманах клинической медицины</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2072-0505</issn><issn publication-format="electronic">2587-9294</issn><publisher><publisher-name xml:lang="en">Moscow Regional Research and Clinical Institute (MONIKI)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1430</article-id><article-id pub-id-type="doi">10.18786/2072-0505-2021-49-008</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>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">Problems in the differential diagnosis of abdominal non-organ tumors</article-title><trans-title-group xml:lang="ru"><trans-title>Сложности дифференциальной диагностики неорганных опухолей абдоминальной области</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1563-0983</contrib-id><name-alternatives><name xml:lang="en"><surname>Kolobanova</surname><given-names>E. S.</given-names></name><name xml:lang="ru"><surname>Колобанова</surname><given-names>Е. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Evgenia S. Kolobanova</bold> – MD, Radiologist, Department of Radiology, Scientific and Research Institute of Clinical and Experimental Radiology </p><p><italic>23 Kashirskoe shosse, Moscow, 115478</italic></p></bio><bio xml:lang="ru"><p><bold>Колобанова Евгения Сергеевна</bold> – врач-рентгенолог рентгенодиагностического отделения Научно-исследовательского института клинической и экспериментальной радиологии </p><p><italic>115478, г. Москва, Каширское шоссе, 23</italic></p></bio><email>evgesha.16.kolobanova@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1779-003X</contrib-id><name-alternatives><name xml:lang="en"><surname>Medvedeva</surname><given-names>B. M.</given-names></name><name xml:lang="ru"><surname>Медведева</surname><given-names>Б. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Bela M. Medvedeva</bold> – MD, PhD, Leading Research Fellow, Department of Radiology, Scientific and Research Institute of Clinical and Experimental Radiology </p><p><italic>23 Kashirskoe shosse, Moscow, 115478</italic></p></bio><bio xml:lang="ru"><p><bold>Медведева Бэла Михайловна</bold> – доктор медицинских наук, ведущий научный сотрудник рентгенодиагностического отделения Научно-исследовательского института клинической и экспериментальной радиологии </p><p><italic>115478, г. Москва, Каширское шоссе, 23</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N.N. Blokhin National Medical Research Center of Oncology</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр онкологии имени Н.Н. Блохина» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-03-30" publication-format="electronic"><day>30</day><month>03</month><year>2021</year></pub-date><volume>49</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>29</fpage><lpage>40</lpage><history><date date-type="received" iso-8601-date="2021-03-15"><day>15</day><month>03</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-03-15"><day>15</day><month>03</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Kolobanova E.S., Medvedeva B.M.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Колобанова Е.С., Медведева Б.М.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Kolobanova E.S., Medvedeva B.M.</copyright-holder><copyright-holder xml:lang="ru">Колобанова Е.С., Медведева Б.М.</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://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://almclinmed.ru/jour/article/view/1430">https://almclinmed.ru/jour/article/view/1430</self-uri><abstract xml:lang="en"><p><bold>Rationale</bold>: The differential diagnosis between lesions requiring surgical intervention and those necessitating medical treatment poses a significant problem for current imaging methods of fat-containing masses in the small intestine mesenterium.</p><p><bold>Aim</bold>: To identify differential diagnostic criteria for various fat-containing neoplasms of abdominal cavity at the preoperative stage.</p><p><bold>Materials and methods</bold>: This retrospective study included data from 29  patients (16  women and 13 men, aged 32 to 81 years, mean age 56 years) with fat-containing masses in the small intestine mesenterium who had undergone preoperative examination at N.N. Blokhin National Medical Research Center of Oncology from 2016 to 2020. Abdominal computed tomography (CT) with intravenous contrast enhancement and assessment of the size, contours, structure and involvement of main vessels was performed in all patients. To interpret single soft tissue nodes within the mass, we used our own list of main CT symptoms (number, size, shape, contours and structure of nodes, degree of their contrast enhancement, and maximal amplification).</p><p><bold>Results</bold>: Fat-containing abdominal masses were morphologically verified as follows: mesenteric panniculitis 13  (45%), well differentiated liposarcoma 10  (35%), lymphoproliferative disorders 4  (14%), lipoma and Castleman disease 1  case each (3%). Twelve (12) of 29  patients (41%) had surgery for various types of tumors, while 17  (59%) patients received appropriate medical treatment after a puncture biopsy-based morphological diagnosis. The CT sensitivity for the detection of fat-containing abdominal neoplasms in our series was 93,1%. The paper describes the radiological signs of the above mentioned mass types with an emphasis on the complexity of their diagnosis.</p><p><bold>Conclusion</bold>: In most cases, CT data can accurately differentiate abdominal liposarcomas from other benign and malignant masses in the small intestine mesenterium.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Актуальность</bold>. Значимой проблемой современных методов визуализации жиросодержащих образований в области брыжейки тонкой кишки остается дифференциальная диагностика между поражениями, в  отношении которых необходимо хирургическое вмешательство или медикаментозное лечение.</p><p><bold>Цель</bold> – выявить дифференциально-диагностические критерии различных жиросодержащих новообразований абдоминальной области на дооперационном этапе.</p><p><bold>Материал и  методы</bold>. В  основу работы положены данные ретроспективного исследования 29  пациентов (16  женщин и  13  мужчин в  возрасте от  32 до  81  года, средний возраст 56  лет) с  жиросодержащими образованиями в  области брыжейки тонкой кишки, проходивших предоперационное обследование в  ФГБУ «НМИЦ онкологии им. Н.Н. Блохина» Минздрава России в  период с  2016 по 2020  г. Всем пациентам выполнялась рентгеновская компьютерная томография (РКТ) органов брюшной полости с  внутривенным контрастированием с  дальнейшей оценкой размеров, контуров, структуры и  вовлечения магистральных сосудов. При анализе отдельных мягкотканных узлов в  толще образования мы пользовались разработанным нами перечнем основных компьютерно-томографических проявлений (количество, размеры, форма, контуры и структура узлов, степень их контрастирования и максимальное усиление).</p><p><bold>Результаты</bold>. Морфологическая верификация жиросодержащих опухолей абдоминальной области была представлена следующим образом: мезентериальный панникулит  – 13  (45%), высокодифференцированная липосаркома  – 10  (35%), лимфопролиферативное поражение  – 4  (14%) и  по единичному наблюдению липомы (3%) и  болезни Кастлемана (3%). Из 29  пациентов 12  (41%) были прооперированы по поводу опухолевых образований различной природы, 17  (59%) получили соответствующее медикаментозное лечение после проведения пункционной биопсии и  верификации процесса. Чувствительность РКТ в  выявлении жиросодержащих новообразований абдоминальной области в  наших наблюдениях составила 93,1%. В  статье приведены рентгенологические признаки представленных выше разновидностей образований с  акцентом на сложности диагностики.</p><p><bold>Заключение</bold>. Полученные при РКТ данные в  большинстве случаев позволяют безошибочно дифференцировать липосаркомы абдоминальной области с  другими доброкачественными и  злокачественными процессами, расположенными в брыжейке тонкой кишки.</p></trans-abstract><kwd-group xml:lang="en"><kwd>liposarcoma</kwd><kwd>mesenteric panniculitis</kwd><kwd>lymphoma</kwd><kwd>Castleman disease</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>липосаркома</kwd><kwd>мезентериальный панникулит</kwd><kwd>лимфома</kwd><kwd>болезнь Кастлемана</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>1. Liles JS, Tzeng CW, Short JJ, Kulesza P, Heslin MJ. Retroperitoneal and intra-abdominal sarcoma. Curr Probl Surg. 2009;46(6):445–503. doi: 10.1067/j.cpsurg.2009.01.004.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>2.Dalal KM, Kattan MW, Antonescu CR, Brennan MF, Singer S. 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