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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">744</article-id><article-id pub-id-type="doi">10.17650/2219-4614-2025-17-2-25-34</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">Use of denosumab in aggressive spinal osteoblastoma</article-title><trans-title-group xml:lang="ru"><trans-title>Использование деносумаба при агрессивных формах остеобластомы позвоночника</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5837-9584</contrib-id><name-alternatives><name xml:lang="en"><surname>Snetkov</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Снетков</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Alexander Andreevich Snetkov</p><p>10 Priorova St., Moscow 127299</p></bio><bio xml:lang="ru"><p>Александр Андреевич Снетков</p><p>127299 Москва, ул. Приорова, 10</p></bio><email>isnetkov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-2228-1405</contrib-id><name-alternatives><name xml:lang="en"><surname>Ishkinyaev</surname><given-names>I. D.</given-names></name><name xml:lang="ru"><surname>Ишкиняев</surname><given-names>И. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>10 Priorova St., Moscow 127299</p></bio><bio xml:lang="ru"><p>127299 Москва, ул. Приорова, 10</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9960-9427</contrib-id><name-alternatives><name xml:lang="en"><surname>Gamayunov</surname><given-names>R. S.</given-names></name><name xml:lang="ru"><surname>Гамаюнов</surname><given-names>Р. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>10 Priorova St., Moscow 127299</p></bio><bio xml:lang="ru"><p>127299 Москва, ул. Приорова, 10</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2310-0106</contrib-id><name-alternatives><name xml:lang="en"><surname>Romantsova</surname><given-names>O. M.</given-names></name><name xml:lang="ru"><surname>Романцова</surname><given-names>О. М.</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="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7838-584X</contrib-id><name-alternatives><name xml:lang="en"><surname>Gavrilov</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Гаврилов</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>build. 12, 1 Leninskie Gory, Moscow 119991</p></bio><bio xml:lang="ru"><p>119991 Москва, Ленинские горы, 1, стр. 12</p></bio><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1222-5066</contrib-id><name-alternatives><name xml:lang="en"><surname>Machak</surname><given-names>G. N.</given-names></name><name xml:lang="ru"><surname>Мачак</surname><given-names>Г. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>10 Priorova St., Moscow 127299</p></bio><bio xml:lang="ru"><p>127299 Москва, ул. Приорова, 10</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N.N. Priorov National Medical Research Center of Traumatology and Orthopedics, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр травматологии и ортопедии им. Н.Н. Приорова» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><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><aff-alternatives id="aff3"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Московский государственный университет им. М.В. Ломоносова»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-07-25" publication-format="electronic"><day>25</day><month>07</month><year>2025</year></pub-date><volume>17</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>25</fpage><lpage>34</lpage><history><date date-type="received" iso-8601-date="2025-07-24"><day>24</day><month>07</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-07-24"><day>24</day><month>07</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Snetkov A.A., Ishkinyaev I.D., Gamayunov R.S., Romantsova O.M., Gavrilov A.V., Machak G.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Снетков А.А., Ишкиняев И.Д., Гамаюнов Р.С., Романцова О.М., Гаврилов А.В., Мачак Г.Н.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Snetkov A.A., Ishkinyaev I.D., Gamayunov R.S., Romantsova O.M., Gavrilov A.V., Machak G.N.</copyright-holder><copyright-holder xml:lang="ru">Снетков А.А., Ишкиняев И.Д., Гамаюнов Р.С., Романцова О.М., Гаврилов А.В., Мачак Г.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/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://sarbon.abvpress.ru/jour/article/view/744">https://sarbon.abvpress.ru/jour/article/view/744</self-uri><abstract xml:lang="en"><p><bold>Introduction</bold>. Osteoblastoma is a locally aggressive benign tumor affecting skeletal bones and most commonly seen in the spine. Most complications arise during treatment of stage III osteoblastoma per the Enneking classification characterized by fast growth and intra- or extracompartmental lesions. Despite the use of modern navigation technologies, intraoperative orientation of a surgeon relative to the soft and bone tissues remains the most important factor of successful and complete resection of the pathological lesion in case of osteoblastoma. The use of denosumab as a neoadjuvant agent promotes sharper differentiation of the tumor from intact bone tissue which makes tumor resection easier. Additionally, this drug can be used in the postoperative period to decrease the risk of recurrence and for unresectable forms of the tumor. <bold>Aim</bold>. To evaluate the effectiveness of denosumab in the treatment of aggressive  spinal osteoblastoma.<bold>Materials and methods.</bold> The results of treatment of 6 patients (5 men, 1 woman) with aggressive stage III osteoblastoma per the Enneking classification who received treatment at the 11th Division of the National Medical Research Center of Traumatology and Orthopedics named after N.N. Priorov between 2021 2025 were analyzed. In all cases, diagnosis was histologically confirmed at the biopsy stage. Tumors were located at different levels of the spine: in 2 cases, in the cervical spine; in 3 cases, in the thoracic spine; and in 1 case, in the sacrum. All patients were prescribed denosumab (off-label). Density and volume of the tumor was evaluated using computed tomography and Gamma Multivox software.<bold>Results</bold>. Analysis of the main effectiveness endpoints showed that the use of denosumab is associated with increased tumor density and significant decrease of pain in all patients. Additionally, a trend towards increased tumor volume per computed tomography was observed which can be explained by improved visualization of the tumor margins due to sclerotization of the soft-tissue component.<bold>Conclusion</bold>. Neoadjuvant therapy with denosumab showed its effectiveness in aggressive osteoblastomas which opens new options for treatment of unresectable and recurrent tumors.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение</bold>. Остеобластома – локально агрессивная доброкачественная опухоль, поражающая кости скелета и чаще всего развивающаяся в позвоночнике. Наибольшие сложности возникают при лечении остеобластомы III стадии по классификации Enneking, характеризующейся быстрым ростом и интра- или экстракомпартментным поражением. Несмотря на применение современных навигационных технологий, интраоперационная ориентация хирурга относительно мягких и костных тканей остается важнейшим фактором успешной абластичной резекции патологического очага в случае остеобластомы. Использование деносумаба как неоадъювантного средства способствует более четкой дифференциации опухоли от интактной костной ткани, что упрощает абластичное удаление новообразования. Кроме того, данный препарат может применяться в послеоперационном периоде для снижения риска возникновения рецидива и в случаях нерезектабельных форм опухоли. <bold>Цель исследования</bold> – оценить эффективность деносумаба при лечении агресивной формы остеобластомы позвоночника. <bold>Материалы и методы</bold>. Проанализированы результаты лечения 6 пациентов (5 мужчин, 1 женщина) с агрессивной остеобластомой III стадии по классификации Enneking, получивших лечение на базе 11-го отделения Национального медицинского центра травматологии и ортопедии им. Н.Н. Приорова в период с 2021 по 2025 г. Во всех случаях диагноз гистологически подтвержден на этапе биопсии. Опухоль локализовалась на различных уровнях позвоночника: в 2 случаях – в шейном отделе, в 3 – в грудном, в 1 – в крестце. Всем пациентам назначен деносумаб (off-label). Плотность и объем опухоли оценивали по данным компьютерной томографии с использованием программы «Гамма Мультивокс».<bold>Результаты</bold>. Анализ основных показателей эффективности лечения показал, что применение деносумаба ассоциируется с увеличением плотности опухоли и заметным снижением болевых ощущений у всех пациентов. Также наблюдается тенденция к незначительному увеличению объема опухоли по данным компьютерной томографии, что может быть связано с улучшением визуализации границ образования из-за склерозирования мягкотканного компонента.<bold>Заключение</bold>. Неоадъювантная терапия деносумабом при агрессивных формах остеобластомы показала свою эффективность, что открывает новые перспективы для лечения нерезектабельных и рецидивирующих опухолей.</p></trans-abstract><kwd-group xml:lang="en"><kwd>osteoblastoma</kwd><kwd>aggressive osteoblastoma</kwd><kwd>neoadjuvant therapy</kwd><kwd>denosumab</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>остеобластома</kwd><kwd>агрессивные формы остеобластомы</kwd><kwd>неоадъювантная терапия</kwd><kwd>деносумаб</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Berry M., Mankin H., Gebhardt M. et al. Osteoblastoma: a 30-year study of 99 cases. J Surg Oncol 2008;98(3):179–83. 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