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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">Bone and soft tissue sarcomas, tumors of the skin</journal-id><journal-title-group><journal-title xml:lang="en">Bone and soft tissue sarcomas, tumors of the skin</journal-title><trans-title-group xml:lang="ru"><trans-title>Саркомы костей, мягких тканей и опухоли кожи</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2219-4614</issn><issn publication-format="electronic">2782-3687</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">763</article-id><article-id pub-id-type="doi">10.17650/2219-4614-2025-17-3-45-56</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>BONE SARCOMAS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>САРКОМЫ КОСТЕЙ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Telangiectatic osteosarcoma in children and adolescents: Experience of the Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology scientific and clinical group on studying sarcomas of the locomotor system</article-title><trans-title-group xml:lang="ru"><trans-title>Телеангиэктатическая остеосаркома у детей и подростков: опыт научно-клинической группы по исследованию сарком опорно-двигательного аппарата НМИЦ ДГОИ им. Дмитрия Рогачева</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6848-8714</contrib-id><name-alternatives><name xml:lang="en"><surname>Konopleva</surname><given-names>E. I.</given-names></name><name xml:lang="ru"><surname>Коноплева</surname><given-names>Е. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Elena Ivanovna Konopleva </bold></p><p>1  Samory  Mashela  St.,  Moscow  117198</p></bio><bio xml:lang="ru"><p><bold>Елена Ивановна Коноплева </bold></p><p>117198  Москва,  ул.  Саморы  Машела, 1</p></bio><email>konoplevadoc@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9300-198X</contrib-id><name-alternatives><name xml:lang="en"><surname>Karachunsky</surname><given-names>A. I. </given-names></name><name xml:lang="ru"><surname>Карачунский</surname><given-names>А. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1  Samory Mashela St.,  Moscow  117198</p></bio><bio xml:lang="ru"><p>117198  Москва,  ул.  Саморы  Машела, 1</p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6313-6712</contrib-id><name-alternatives><name xml:lang="en"><surname> Bolshakov</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Большаков</surname><given-names>Н. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1  Samory  Mashela  St.,  Moscow  117198</p></bio><bio xml:lang="ru"><p>117198  Москва,  ул.  Саморы  Машела, 1</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0777-9152</contrib-id><name-alternatives><name xml:lang="en"><surname>Rogozhin</surname><given-names>D. V.</given-names></name><name xml:lang="ru"><surname>Рогожин</surname><given-names>Д. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>24  Kashirskoe  Shosse,  Moscow  115522</p></bio><bio xml:lang="ru"><p>115522  Москва, Каширское шоссе,  24</p></bio><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9424-1646</contrib-id><name-alternatives><name xml:lang="en"><surname>Uskova</surname><given-names>N.  G. </given-names></name><name xml:lang="ru"><surname>Ускова</surname><given-names>Н. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1  Samory  Mashela  St.,  Moscow  117198</p></bio><bio xml:lang="ru"><p>117198  Москва,  ул.  Саморы  Машела, 1</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8129-0545</contrib-id><name-alternatives><name xml:lang="en"><surname>Shcherbakov</surname><given-names>A. P. </given-names></name><name xml:lang="ru"><surname>Щербаков</surname><given-names>А. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1  Samory  Mashela  St.,  Moscow  117198</p></bio><bio xml:lang="ru"><p>117198  Москва,  ул.  Саморы  Машела, 1</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8578-6572</contrib-id><name-alternatives><name xml:lang="en"><surname>Sidorov</surname><given-names>I.  V.</given-names></name><name xml:lang="ru"><surname>Сидоров</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1  Samory  Mashela  St.,  Moscow  117198</p></bio><bio xml:lang="ru"><p>117198  Москва,  ул.  Саморы  Машела, 1</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3232-2322</contrib-id><name-alternatives><name xml:lang="en"><surname>Bydanov</surname><given-names>O.  I. </given-names></name><name xml:lang="ru"><surname>Быданов</surname><given-names>О. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1  Samory  Mashela  St.,  Moscow  117198</p></bio><bio xml:lang="ru"><p>117198  Москва,  ул.  Саморы  Машела, 1</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4911-0553</contrib-id><name-alternatives><name xml:lang="en"><surname> Novichkova</surname><given-names>G.  A.</given-names></name><name xml:lang="ru"><surname>Новичкова</surname><given-names>Г. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>1  Samory  Mashela  St.,  Moscow  117198</p></bio><bio xml:lang="ru"><p>117198  Москва,  ул.  Саморы  Машела, 1</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Dmitry  Rogachev  National  Medical  Research  Center  of  Pediatric  Hematology,  Oncology  and  Immunology,  Ministry  of  Health  of  Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ  «Национальный  медицинский  исследовательский центр  детской  гематологии,  онкологии  и  иммунологии   &#13;
им.  Дмитрия  Рогачева»  Минздрава  России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Dmitry  Rogachev  National  Medical  Research  Center  of  Pediatric  Hematology,   Oncology  and  Immunology,  Ministry  of  Health  of  Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ  «Национальный  медицинский  исследовательский центр  детской  гематологии,  онкологии  и  иммунологии   &#13;
им.  Дмитрия  Рогачева»  Минздрава  России</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">N.N.  Blokhin  National  Medical  Research  Center  of  Oncology,  Ministry  of  Health  of  Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ  «Национальный  медицинский  исследовательский центр  онкологии  им.  Н. Н.  Блохина»  Минздрава  России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-10-14" publication-format="electronic"><day>14</day><month>10</month><year>2025</year></pub-date><volume>17</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>45</fpage><lpage>56</lpage><history><date date-type="received" iso-8601-date="2025-10-14"><day>14</day><month>10</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-10-14"><day>14</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Konopleva E.I., Karachunsky A.I.,  Bolshakov N.A., Rogozhin D.V., Uskova N.G., Shcherbakov A.P., Sidorov I.V., Bydanov O.I.,  Novichkova G.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Коноплева Е.И., Карачунский А.И., Большаков Н.А., Рогожин Д.В., Ускова Н.Г., Щербаков А.П., Сидоров И.В., Быданов О.И., Новичкова Г.А.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Konopleva E.I., Karachunsky A.I.,  Bolshakov N.A., Rogozhin D.V., Uskova N.G., Shcherbakov A.P., Sidorov I.V., Bydanov O.I.,  Novichkova G.A.</copyright-holder><copyright-holder xml:lang="ru">Коноплева Е.И., Карачунский А.И., Большаков Н.А., Рогожин Д.В., Ускова Н.Г., Щербаков А.П., Сидоров И.В., Быданов О.И., Новичкова Г.А.</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://sarbon.abvpress.ru/jour/article/view/763">https://sarbon.abvpress.ru/jour/article/view/763</self-uri><abstract xml:lang="en"><p><bold>Introduction.</bold> Telangiectatic osteosarcoma is a rare histological subtype of osteosarcoma, accounting for 2–12 % of all cases. Although telangiectatic osteosarcoma is characterized by unique morphological and radiological features, its diagnosis might be challenging due to its similarity to aneurysmal bone cysts and giant cell tumors.<bold> </bold></p><p><bold>Aim.</bold> To evaluate oncologic outcomes in a large homogeneous series of children and adolescents with telangiectatic osteosarcoma.</p><p><bold> Materials and methods</bold>. The study included treatment-naive patients under the age of 18 with a diagnosis of telangiectatic osteosarcoma confirmed between January 1, 2012, and December 31, 2023, and prospectively registered at the Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology. All patients received MAP-based chemotherapy (according to the EURAMOS-1 protocol). Treatment outcomes were assessed</p><p>using event-free survival and overall survival rates, calculated by the Kaplan–Meier method.<bold> Results</bold>. Among 368 primary osteosarcoma patients, the telangiectatic subtype was diagnosed in 40 cases (10.8 %). At initial diagnosis, 48.7 % of patients had pulmonary metastases, and pathological fractures were identified in 33.4 % of cases. Histological examination showed good response to preoperative chemotherapy in 76.3 % of patients. The median follow-up was 3.65 years. 5-year overall survival and event-free survival rates for all patients were 73.4 % and 57.3 %, respectively.</p><p><bold> Conclusion</bold>. Due to combination treatment including surgical tumor resection and neo- and adjuvant polychemotherapy, treatment outcomes for patients with telangiectatic osteosarcoma are similar to outcomes in patients with conventional osteosarcoma.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Телеангиэктатическая остеосаркома представляет собой один из редких гистологических подтипов остеосарком, на долю которого приходится от 2 до 12 % всех ее случаев. Диагностика телеангиэктатической остеосаркомы зачастую вызывает затруднения ввиду схожести морфологической и радиологической картин с аневризмальной костной кистой и гигантоклеточной опухолью.</p><p><bold> Цель исследования</bold> – оценить результаты лечения детей и подростков с ТОС.</p><p><bold> Материалы и методы</bold>. В исследование включены первичные пациенты с установленным диагнозом «телеангиэктатическая остеосаркома» в возрасте до 18 лет, проспективно зарегистрированные в Национальном медицинском исследовательском центре детской гематологии, онкологии и иммунологии им. Дмитрия Рогачева в период с 01.01.2012 по 31.12.2023. Все пациенты получали специфическую терапию по схеме MAP (на основе протокола EURAMOS-1).<bold> </bold>Результаты лечения оценивались по показателям бессобытийной и общей выживаемости, рассчитанным по методу Каплана–Майера.</p><p><bold> Результаты.</bold> У 40 (10,8 %) из 368 первичных пациентов с остеосаркомой диагностирован ее телеангиэктатический вариант. На момент инициальной диагностики 48,7 % больных имели метастатическое поражение легких, патологический перелом диагностирован в 33,4 % случаев. По результатам гистологического исследования хороший ответ на предоперационную полихимиотерапию (III и IV степени терапевтического патоморфоза) выявлен у 76,3 % пациентов. Медиана наблюдения составила 3,65 года. Показатели 5-летней общей и бессобытийной выживаемости всех больных составили 73,4 и 57,3 % соответственно.</p><p><bold>Заключение</bold>. Результаты лечения пациентов с телеангиэктатической остеосаркомой благодаря комбинированному лечению, включающему хирургическую резекцию опухоли и полихимиотерапию в нео- и адъювантном режимах, сопоставимы с результатами лечения больных с конвенциональной остеосаркомой.</p></trans-abstract><kwd-group xml:lang="en"><kwd>telangiectatic osteosarcoma</kwd><kwd>bone sarcoma</kwd><kwd>children</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>телеангиэктатическая остеосаркома</kwd><kwd>саркома костей</kwd><kwd>дети</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>WHO Classification of tumours editorial board. WHO Classification of tumours. soft tissue and bone tumours, 5th edn. Vol. 3. Lyon: IARC, 2020.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Stiller C.A., Bielack S.S., Jundt G. et al. Bone tumours in European children and adolescents, 1978–1997. 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