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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">ldt</journal-id><journal-title-group><journal-title xml:lang="ru">Лучевая диагностика и терапия</journal-title><trans-title-group xml:lang="en"><trans-title>Diagnostic radiology and radiotherapy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-5343</issn><publisher><publisher-name>Baltic Medical Education Center</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22328/2079-5343-2024-15-3-39-47</article-id><article-id custom-type="elpub" pub-id-type="custom">ldt-1020</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL RESEARCH</subject></subj-group></article-categories><title-group><article-title>Адаптивная стереотаксическая радиохирургия при церебральных метастазах немелкоклеточного рака легкого: ретроспективное исследование</article-title><trans-title-group xml:lang="en"><trans-title>Adaptive stereotactic radiosurgery for cerebral metastases of non-small cell lung cancer: a retrospective study</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гиземова</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Hizemava</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гиземова Ольга Анатольевна — кандидат медицинских наук, врач — радиационный онколог </p><p>223040, Минская область, Минский район, аг. Лесной </p></bio><bio xml:lang="en"><p>Volha A. Hizemava — Cand. of Sci. (Med.), radiation oncologist </p><p>223040, Minsk region, Lesnoy </p></bio><email xlink:type="simple">gizemova@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1324-3656</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Демешко</surname><given-names>П. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Dziameshka</surname><given-names>P. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Демешко Павел Дмитриевич — доктор медицинских наук, профессор, главный научный сотрудник лаборатории лучевой терапии </p><p>223040, Минская область, Минский район, аг. Лесной </p></bio><bio xml:lang="en"><p>Pavel D. Dziameshka — Dr. of Sci. (Med.), professor, chief researcher, Laboratory of radiation therapy </p><p>223040, Minsk region, Lesnoy </p></bio><email xlink:type="simple">pdemeshko@me.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Республиканский научно-практический центр онкологии и медицинской радиологии имени Н.Н.Александрова</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>N. N. Alexandrov National Cancer Centre of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>11</day><month>10</month><year>2024</year></pub-date><volume>15</volume><issue>3</issue><fpage>39</fpage><lpage>47</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гиземова О.А., Демешко П.Д., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Гиземова О.А., Демешко П.Д.</copyright-holder><copyright-holder xml:lang="en">Hizemava V.A., Dziameshka P.D.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://radiag.bmoc-spb.ru/jour/article/view/1020">https://radiag.bmoc-spb.ru/jour/article/view/1020</self-uri><abstract><sec><title>ВВЕДЕНИЕ</title><p>ВВЕДЕНИЕ: Немелкоклеточный рак легкого (НМРЛ) является частой причиной развития метастатического поражения головного мозга (МПГМ). Адаптивная стереотаксическая радиохирургия (АСРХ) может быть полезной опцией в лечении пациентов с крупными нерезектабельными метастазами в головном мозге (МГМ), однако на сегодняшний день имеется лишь ограниченное число исследований, позволяющих оценить эффективность данного метода.</p></sec><sec><title>ЦЕЛЬ</title><p>ЦЕЛЬ: Анализ эффективности АСРХ у пациентов с крупными МГМ НМРЛ, не подлежащими хирургической резекции.</p></sec><sec><title>МАТЕРИАЛЫ И МЕТОДЫ</title><p>МАТЕРИАЛЫ И МЕТОДЫ: Ретроспективно проанализированы данные 37 пациентов, страдающих НМРЛ, с 45 крупными (&gt;2 см в диаметре, объемом &gt;4 см3) нерезектабельными МГМ, пролеченными на Гамма-ноже модели Perfexion c использованием двух- и трехфракционной АСРХ. Из них метастазами плоскоклеточного рака легкого были 14 очагов (31,1%), метастазами аденокарциномы — 31 (68,9%). Медиана объема очагов, подвергнутых АСРХ, составила 9,8 (разброс значений 4,6–30,6 см3). Изучены динамика изменения объема между фракциями и кумулятивная инцидентность локальных рецидивов (КИЛР), выполнен ROC-анализ для параметра объема опухоли. Оценены выживаемость без интракраниального прогрессирования (иВБП) и общая выживаемость (ОВ). Статистика: Для установления статистической значимости различий для связанных переменных использованы критерий Вилкоксона для попарных сравнений, критерий Фридмана для трех и более групп. Для расчета показателей локального контроля, иВБП и ОВ использован метод Каплана–Мейера. Для сравнения данных по выживаемости в двух группах использован критерий log-rank.</p></sec><sec><title>РЕЗУЛЬТАТЫ</title><p>РЕЗУЛЬТАТЫ: Медиана периода наблюдения составила 19,4 мес. При двухфракционной АСРХ медиана объема метастаза уменьшилась на 28,6% ко второму сеансу, при трехфракционной — на 40,0% к третьему сеансу. Показатели 1-годичной и 2-летней КИЛР составили соответственно 8,6±6,1%; 26,1±12,3%. При ROC-анализе площадь под кривой (AUC) для параметра объема опухоли составила 0,80 (95% ДИ 0,6–1,0) c оптимальным порогом разделения значений 18,5 см3. Различия в КИЛР между группами с объемом метастаза &lt;18,5 см3 и ≥18,5 см3 были статистически значимыми (р&lt;0,001). Медиана иВБП составила 8,3 (95% ДИ 5,9–10,7) месяца, 1-годичная иВБП — 33,5±8,1%; 2-летняя — 7,8±5,2%. Медиана ОВ составила 13,2 (95% ДИ 9,0–17,4) месяца; 1-годичная ОВ — 52,9±8,7%, 2-летняя — 22,4±8,8%.</p></sec><sec><title>ОБСУЖДЕНИЕ</title><p>ОБСУЖДЕНИЕ: Используя двух и трехфракционную АСРХ, мы подвели к крупным МГМ дозы, достаточные для высокого уровня локального контроля при приемлемом риске развития нейротоксичности: 1-годичный локальный контроль составил 91,4%; 2-летний — 73,9%; частота развития радионекроза — 8,5%. Было выявлено статистически значимое влияние объема очага ≥18,5 см3 на риск развития локальных рецидивов. Показатели иВБП и ОВ после проведения АСРХ можно считать удовлетворительными для данной группы пациентов.</p></sec><sec><title>ЗАКЛЮЧЕНИЕ</title><p>ЗАКЛЮЧЕНИЕ: АСРХ является эффективной и, возможно, оптимальной стратегией в лечении крупных нерезектабельных МГМ у пациентов с НМРЛ, однако необходимо сравнение с другими современными методами лучевого лечения, такими как стереотаксическая гипофракционированная лучевая терапия и ОВГМ с симультанным интегрированным бустом.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>INTRODUCTION</title><p>INTRODUCTION: Non-small cell lung cancer (NSCLC) is a common cause of brain metastases (BM). Adaptive stereotactic radiosurgery (ASRS) may be a useful option in the treatment of patients with large unresectable brain metastases (BM), but to date there are only a limited number of studies evaluating the effectiveness of this method.</p></sec><sec><title>OBJECTIVE</title><p>OBJECTIVE: To analyze the effectiveness of ASRS in patients with large BM NSCLC not subject to surgical resection.</p></sec><sec><title>MATERIAL AND METHODS</title><p>MATERIAL AND METHODS: We retrospectively analyzed data from 37 patients suffering from NSCLC with 45 large (&gt;2 cm in diameter, volume &gt;4 cm3) unresectable BM treated with the Gamma Knife Perfexion model using two- and three-fraction ASRS. Of these, 14 foci (31.1%) were metastases of squamous cell lung cancer, 31 (68.9%) were metastases of adenocarcinoma. The median volume of lesions treated with ASRS was 9.8 (range 4.6–30.6 cm3). The dynamics of volume changes between fractions and the cumulative incidence of local relapses (CILR) were studied, and ROC analysis was performed for the tumor volume parameter. Intracranial progression-free survival (iPFS) and overall survival (OS) were assessed. Statistics: To establish statistical significance of differences for related variables, the Wilcoxon test for pairwise comparisons and the Friedman test for three or more groups were used. The Kaplan-Meier method was used to calculate local control, PFS, and OS rates. The log-rank test was used to compare survival data in two groups.</p></sec><sec><title>RESULTS</title><p>RESULTS: The median follow-up period was 19.4 months. With two-fraction ASRS, the median volume of metastasis decreased by 28.6% by the second session, with three-fraction — by 40.0% by the third session. The 1-year and 2-year CILR rates were 8.6±6.1%, respectively; 26.1±12.3%. In ROC analysis, the area under the curve (AUC) for tumor volume was 0.80 (95% CI 0.6– 1.0) with an optimal cutoff of 18.5 cm3. The differences in CILR between the groups with metastasis volume &lt;18.5 cm3 and ≥18.5 cm3 were statistically significant (p&lt;0.001). Median iPFS was 8.3 (95% CI 5.9–10.7) months, 1-year iPFS was 33.5±8.1%;2-year — 7.8±5.2%. Median OS was 13.2 (95% CI 9.0–17.4) months; 1-year OS — 52.9±8.7%, 2-year — 22.4±8.8%.</p></sec><sec><title>DISCUSSION</title><p>DISCUSSION: Using two- and three-fraction ASRS, we delivered doses to large BM sufficient for a high level of local control with an acceptable risk of neurotoxicity: 1-year local control was 91.4%; 2-year — 73.9%; the incidence of radionecrosis is 8.5%. A statistically significant effect of lesion volume ≥18.5 cm3 on the risk of local recurrence was found. The iPFS and OS indicators after ASRS can be considered satisfactory for this group of patients.</p></sec><sec><title>CONCLUSION</title><p>CONCLUSION: ASRS is an effective and perhaps optimal strategy for the treatment of large unresectable BM in patients with NSCLC, but comparison with other modern radiotherapy modalities such as stereotactic hypofractionated radiotherapy and WBRT with simultaneous integrated boost is needed.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>гамма-нож</kwd><kwd>метастатическое поражение головного мозга</kwd><kwd>адаптивная стереотаксическая радиохирургия</kwd><kwd>немелкоклеточный рак легкого</kwd><kwd>локальный рецидив</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Gamma Knife</kwd><kwd>metastatic brain damage</kwd><kwd>adaptive stereotactic radiosurgery</kwd><kwd>non-small cell lung cancer</kwd><kwd>local relapse</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Waqar S.N., Samson P.P., Robinson C.G. et al. 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