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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">Journal of Experimental and Clinical Surgery</journal-id><journal-title-group><journal-title xml:lang="en">Journal of Experimental and Clinical Surgery</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник экспериментальной и клинической хирургии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2070-478X</issn><issn publication-format="electronic">2409-143X</issn><publisher><publisher-name xml:lang="en">Voronezh State Medical University named after N.N. Burdenko</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1757</article-id><article-id pub-id-type="doi">10.18499/2070-478X-2024-17-1-31-40</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Cases from practice</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Случаи 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">Solitary Fibrous Tumor of the Liver Disguised as Hepatocellular Cancer</article-title><trans-title-group xml:lang="ru"><trans-title>Солитарная фиброзная опухоль печени под маской гепатоцеллюлярного рака</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ruzavin</surname><given-names>Vladimir S.</given-names></name><name xml:lang="ru"><surname>Рузавин</surname><given-names>Владимир Семенович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ph.D., surgeon of Oncology Department of Surgical Treatment Methods</p></bio><bio xml:lang="ru"><p>к.м.н., врач-хирург онкологического отделения хирургических методов лечения </p></bio><email>mfruzavin@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gorlenko</surname><given-names>Cyrill L.</given-names></name><name xml:lang="ru"><surname>Горленко</surname><given-names>Кирилл Леонидович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>resident in the specialty “Surgery”</p></bio><bio xml:lang="ru"><p>ординатор по специальности «Хирургия»</p></bio><email>mr.gorlenko@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shirokov</surname><given-names>Vadim S.</given-names></name><name xml:lang="ru"><surname>Широков</surname><given-names>Вадим Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>radiologist of Radiology and Magnetic Resonance Research Department</p></bio><bio xml:lang="ru"><p>врач-рентгенолог отделения рентгенологии и магнитно-резонансных исследований </p></bio><email>vadimshirokov@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kalinin</surname><given-names>Dmitry V.</given-names></name><name xml:lang="ru"><surname>Калинин</surname><given-names>Дмитрий Валерьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ph.D., Head of Pathological Anatomy Department</p></bio><bio xml:lang="ru"><p>к.м.н., заведующий отделением патологической анатомии</p></bio><email>dmitry.v.kalinin@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Goncharov</surname><given-names>Anton B.</given-names></name><name xml:lang="ru"><surname>Гончаров</surname><given-names>Антон Борисович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Researcher of Oncology Department of Surgical Treatment Methods</p></bio><bio xml:lang="ru"><p>научный сотрудник онкологического отделения хирургических методов лечения </p></bio><email>anton_goncharov@inbox.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kovalenko</surname><given-names>Yuri A.</given-names></name><name xml:lang="ru"><surname>Коваленко</surname><given-names>Юрий Алексеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>M.D., Senior Researcher of Oncology Department of Surgical Treatment Methods</p></bio><bio xml:lang="ru"><p>д.м.н., старший научный сотрудник онкологического отделения хирургических методов </p></bio><email>kovalenkoya@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Stepanova</surname><given-names>Yulia A.</given-names></name><name xml:lang="ru"><surname>Степанова</surname><given-names>Юлия Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>M.D., Professor, Academic Secretary</p></bio><bio xml:lang="ru"><p>д.м.н., профессор, Ученый секретарь</p></bio><email>stepanovaua@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gurmikov</surname><given-names>Beslan N.</given-names></name><name xml:lang="ru"><surname>Гурмиков</surname><given-names>Беслан Нуралиевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>M.D., Head of Oncology Department of Surgical Treatment Methods</p></bio><bio xml:lang="ru"><p>д.м.н., заведующий онкологическим отделением хирургических методов лечения </p></bio><email>gurmikov@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">A.V. Vishnevsky National Medical Research Center of Surgery</institution></aff><aff><institution xml:lang="ru">Национальный медицинский исследовательский центр хирургии им. А.В. Вишневского</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2024</year></pub-date><volume>17</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>31</fpage><lpage>40</lpage><history><date date-type="received" iso-8601-date="2023-11-01"><day>01</day><month>11</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2024-04-07"><day>07</day><month>04</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Ruzavin V.S., Gorlenko C.L., Shirokov V.S., Kalinin D.V., Goncharov A.B., Kovalenko Y.A., Stepanova Y.A., Gurmikov B.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Рузавин В.С., Горленко К.Л., Широков В.С., Калинин Д.В., Гончаров А.Б., Коваленко Ю.А., Степанова Ю.А., Гурмиков Б.Н.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Ruzavin V.S., Gorlenko C.L., Shirokov V.S., Kalinin D.V., Goncharov A.B., Kovalenko Y.A., Stepanova Y.A., Gurmikov B.N.</copyright-holder><copyright-holder xml:lang="ru">Рузавин В.С., Горленко К.Л., Широков В.С., Калинин Д.В., Гончаров А.Б., Коваленко Ю.А., Степанова Ю.А., Гурмиков Б.Н.</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/">http://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://vestnik-surgery.com/journal/article/view/1757">https://vestnik-surgery.com/journal/article/view/1757</self-uri><abstract xml:lang="en"><p>Solitary fibrous tumor (SFT) is a rare neoplasm of mesenchymal origin characterised by NAB2 and STAT6 genes fusion. SFT occurs in one of 300.000 patients who seek medical attention. Incidence rate of liver SFT is unavailable due to a minor number of existing observations. In most cases, diagnosis of SFT is incidental. Yet, in 5% of cases, it manifests as paraneoplastic syndromes. Differential diagnosis using CT and MRI is complicated due to unspecific pattern of the neoplasm. This paper presents a clinical case of a 58-year-old patient who applied for a consultation at A.V. Vishnevsky National Medical Research Center of Surgery. Due to non-specificity, the laboratory and instrumental examination findings did not allow making a correct diagnosis at the preoperative stage. Histological examination findings helped to finally diagnose solitary fibrous tumor. Based on the data obtained, we can draw a conclusion about the imperfection of existing diagnostic options and the need to identify specific criteria for solitary fibrous tumor diagnosis.</p></abstract><trans-abstract xml:lang="ru"><p>Солитарная фиброзная опухоль (СФО) – редкая опухоль мезенхимального происхождения, характеризуется слиянием генов NAB2 и STAT6. СФО встречается у 1 из 300 тысяч обратившихся; популяционная статистика СФО печени недоступна, в связи с малым числом наблюдений. Как правило, СФО является случайной находкой, однако в 5% случаев может проявляться паранеопластическими синдромами. Возможность дифференциальной диагностики при помощи КТ и МРТ ограничена, поскольку на сегодняшний день не выделены соответствующие критерии. В данной статье представлен клинический случай лечения пациента 58 лет, обратившегося на консультацию в НМИЦ хирургии им. А.В. Вишневского. В силу неспецифичности, полученные результаты лабораторных и инструментальных обследований не позволяли поставить правильный диагноз на предоперационном этапе. По результатам гистологического исследования установлен окончательный диагноз солитарной фиброзной опухоли. На основе полученных данных можно сделать заключение о несовершенстве существующих методов диагностики и необходимости выделения специфических критериев для солитарной фиброзной опухоли.</p></trans-abstract><kwd-group xml:lang="en"><kwd>solitary fibrous tumor</kwd><kwd>hepatocellular cancer</kwd><kwd>ultrasound</kwd><kwd>MSCT</kwd><kwd>MRI</kwd><kwd>surgery treatment</kwd><kwd>morphology</kwd><kwd>immunohistochemistry</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>солитарная фиброзная опухоль</kwd><kwd>гепатоцеллюлярный рак</kwd><kwd>УЗИ</kwd><kwd>МСКТ</kwd><kwd>МРТ</kwd><kwd>хирургическое лечение</kwd><kwd>морфология</kwd><kwd>иммуногистохимия</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>De Perrot M, Fischer S, Bründler MA, Sekine Y, Keshavjee S. Solitary fibrous tumors of the pleura. 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