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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">Russian Journal of Oncology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Oncology</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский онкологический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1028-9984</issn><issn publication-format="electronic">2412-9119</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">43677</article-id><article-id pub-id-type="doi">10.17816/1028-9984-2020-25-2-50-55</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original Study Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные исследования</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">Invasive potential of retroperitoneal well-differentiated liposarcomas depending on the extent of sclerosing component in the tumor</article-title><trans-title-group xml:lang="ru"><trans-title>Инвазивные свойства забрюшинных высокодифференцированных липосарком в зависимости от доли склерозирующего компонента в опухоли</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4412-2256</contrib-id><name-alternatives><name xml:lang="en"><surname>Volkov</surname><given-names>A. Yu.</given-names></name><name xml:lang="ru"><surname>Волков</surname><given-names>Александр Юрьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD student, the oncological department of surgical methods of treatment №6 (abdominal oncology). N. N. Blokhin National Medical Research Centre of oncology</p></bio><bio xml:lang="ru"><p>аспирант онкологического отделения хирургических методов лечения № 6 (абдоминальной онкологии) ФГБУ «НМИЦ онкологии им. Н.Н. Блохина» Министерства здравоохранения Российской Федерации</p></bio><email>79164577128@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kozlov</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Козлов</surname><given-names>Н. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>79164577128@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nered</surname><given-names>S. N.</given-names></name><name xml:lang="ru"><surname>Неред</surname><given-names>С. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>79164577128@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Stilidi</surname><given-names>I. S.</given-names></name><name xml:lang="ru"><surname>Стилиди</surname><given-names>И. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>79164577128@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Stroganova</surname><given-names>A. M.</given-names></name><name xml:lang="ru"><surname>Строганова</surname><given-names>А. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>79164577128@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Archery</surname><given-names>P. P.</given-names></name><name xml:lang="ru"><surname>Архири</surname><given-names>П. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>79164577128@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Antonov</surname><given-names>E. Yu.</given-names></name><name xml:lang="ru"><surname>Антонова</surname><given-names>Е. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>79164577128@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Privezentsev</surname><given-names>S. A.</given-names></name><name xml:lang="ru"><surname>Привезенцев</surname><given-names>С. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>79164577128@yandex.ru</email><xref ref-type="aff" rid="aff2"/></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 «НМИЦ онкологии им. Н.Н. Блохина» Министерства здравоохранения Российской Федерации</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">D.D. Pletnev City Clinical Hospital</institution></aff><aff><institution xml:lang="ru">ГБУ ДЗ г. Москвы «Городская клиническая больница им. Д.Д. Плетнёва»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2020</year></pub-date><volume>25</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>50</fpage><lpage>55</lpage><history><date date-type="received" iso-8601-date="2020-09-04"><day>04</day><month>09</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, ООО "Эко-Вектор"</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">ООО "Эко-Вектор"</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2023-10-16"/></permissions><self-uri xlink:href="https://rjonco.com/1028-9984/article/view/43677">https://rjonco.com/1028-9984/article/view/43677</self-uri><abstract xml:lang="en"><p><bold>Objective</bold><bold>.</bold> To assess the influence of the extent of sclerosing component in the retroperitoneal well-differentiated liposarcoma (WDLPS) on the survival.</p> <p><bold>Material and methods.</bold> The retrospective study included 111 patients with primary retroperitoneal WLPS who underwent radical surgical treatment in Federal State Budgetary Institution «N.N. Blokhin National Medical Research Center of Oncology». Histological slides of all surgical specimens were reviewed by experienced pathologist and reclassified according to criteria of WHO (2013). Patients were divided into groups depending on the extent of the sclerosing component in the tumor and enrolled in intergroup analysis. We analyzed relationship between extent of the sclerosing component in the tumor and frequency of the pathologically confirmed visceral invasion. Also, we have analyzed the influence of the visceral invasion of WDLPS on the long-term results – overall (OS) and recurrence-free (RFS) survival.</p> <p><bold>Results.</bold> Pathologically confirmed visceral invasion was revealed in 17% of cases with the sclerosing component less 20%, and in 31% of cases with the sclerosing component more 20%. OS was significantly worse in the group of patients who suffered from WDLPS with visceral invasion than in the group of patients without visceral invasion (p = 0.009; logarithmic criterion). The median OS in the compared groups was 85 (95% CI, 84, 87) and 142 (95% CI, 109, 175) months, the 5-year OS rate was 41% and 86%, respectively. RFS was significantly worse in the group of patients with histologically confirmed visceral invasion than in the group without organ invasion (p = 0.001; logarithmic criterion). Median RFS in the compared groups was 26 (95% CI, 20, 32) and 57 (95% CI, 38, 76) months, 2-year RFS 33% and 85%, respectively.</p> <p><bold>Conclusion.</bold> Results of the study demonstrate more aggressive behavior of WDLPS with increasing extent of the sclerosing component. We believe that semi-quantitative counting of sclerosing component in retroperitoneal WDLPS can serve as an effective morphological marker of a less favorable prognosis of the disease.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель исследования.</bold> Оценка влияния доли склерозирующего компонента в забрюшинных высокодифференцированных липосаркомах (ВДЛПС) на течение и прогноз заболевания.</p> <p><bold>Материал и методы.</bold> В ретроспективное исследование было включено 111 пациентов с первичными забрюшинными ВДЛПС, которым было выполнено радикальное хирургическое лечение в ФГБУ «НМИЦ онкологии им. Н.Н. Блохина» Министерства здравоохранения Российской Федерации. Сделаны пересмотр и реклассификация гистологических препаратов операционного материала всех случаев ВДЛПС. В зависимости от доли склерозирующего компонента в опухоли больные были поделены на группы сравнения. Проведён анализ взаимосвязи доли склерозирующего компонента в опухоли и частоты врастания ВДЛПС в прилежащие органы. Также проанализировано влияние врастания ВДЛПС в прилежащие органы на общую (ОВ) и безрецидивную (БРВ) выживаемость.</p> <p><bold>Результаты.</bold> Морфологически подтверждённое врастание в прилежащие органы ВДЛПС с долей склерозирующего компонента менее 20% было отмечено в 17% случаев, при ВДЛПС с долей склерозирующего компонента более 20% – в 31% случаев. Показатель ОВ был достоверно хуже в группе больных с гистологически подтверждённым врастанием опухоли в прилежащие органы, чем у пациентов с ВДЛПС без органной инвазии (p = 0,009; log-rank test). Медиана ОВ в сравниваемых группах составила 85 (95% ДИ (84,0; 87,0)) и 142 (95% ДИ (109,0; 175,0)) мес, показатель 5-летней ОВ равнялся 41 и 86% соответственно. БРВ была так же достоверно хуже в группе больных с гистологически подтверждённым врастанием ВДЛПС в органы, чем в группе без органной инвазии (p = 0,001; log-rank test). Медиана БРВ в сравниваемых группах составила 26 (95% ДИ (20,0; 32,0)) и 57 (95% ДИ (38,0; 76,0)) мес, показатели 2-летней БРВ – 33 и 85% соответственно.</p> <p><bold>Заключение.</bold> Результаты исследования демонстрируют более агрессивное течение ВДЛПС с увеличением частоты врастания опухоли в прилежащие органы и уменьшением ОВ и БРВ при нарастании доли склерозирующего компонента в опухоли. Мы полагаем, что полуколичественная оценка доли склерозирующего компонента в ВДЛПС способна служить простым и эффективным морфологическим маркером течения заболевания и прогноза при забрюшинных ВДЛПС.</p></trans-abstract><kwd-group xml:lang="en"><kwd>liposarcoma</kwd><kwd>well-differentiated liposarcoma</kwd><kwd>retroperitoneal tumor</kwd><kwd>prognosis</kwd><kwd>sclerosing</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>липосаркома</kwd><kwd>высокодифференцированная липосаркома</kwd><kwd>забрюшинная опухоль</kwd><kwd>прогноз</kwd><kwd>склерозирующий</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Raut C.P., Miceli R., Strauss D.C., Swallow C.J. et al. External validation of a multi-institutional retroperitoneal sarcoma nomogram. 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