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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">Cancer Urology</journal-id><journal-title-group><journal-title xml:lang="en">Cancer Urology</journal-title><trans-title-group xml:lang="ru"><trans-title>Онкоурология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1726-9776</issn><issn publication-format="electronic">1996-1812</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">1851</article-id><article-id pub-id-type="doi">10.17650/1726-9776-2025-21-1-35-49</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>DIAGNOSIS AND TREATMENT OF URINARY SYSTEM TUMORS. PROSTATE CANCER</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ДИАГНОСТИКА И ЛЕЧЕНИЕ ОПУХОЛЕЙ МОЧЕПОЛОВОЙ СИСТЕМЫ. Рак предстательной железы</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Immediate results of perineal implantation of a prostate-rectum biodegradable spacer</article-title><trans-title-group xml:lang="ru"><trans-title>Непосредственные результаты промежностной имплантации парапростатического биодеградируемого спейсера</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1873-1293</contrib-id><name-alternatives><name xml:lang="en"><surname>Novikov</surname><given-names>R. V.</given-names></name><name xml:lang="ru"><surname>Новиков</surname><given-names>Р. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Roman Vladimirovich Novikov</p><p>68 Leningradskaya St., Pesochnyy, Saint Petersburg 197758; 6 Akademika Lebedeva St., Saint Petersburg 194044</p></bio><bio xml:lang="ru"><p>197758 Санкт-Петербург, п. Песочный, ул. Ленинградская, 68; 194044 Санкт-Петербург, ул. Академика Лебедева, 6</p></bio><email>novikov-spb@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-5155-9491</contrib-id><name-alternatives><name xml:lang="en"><surname>Karandashov</surname><given-names>V. K.</given-names></name><name xml:lang="ru"><surname>Карандашов</surname><given-names>В. К.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>6 Akademika Lebedeva St., Saint Petersburg 194044</p></bio><bio xml:lang="ru"><p>194044 Санкт-Петербург, ул. Академика Лебедева, 6</p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zhivulina</surname><given-names>T. V.</given-names></name><name xml:lang="ru"><surname>Живулина</surname><given-names>Т. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>225/1 Kommunarov St., 350000 Krasnodar</p></bio><bio xml:lang="ru"><p>350000 Краснодар, ул. Коммунаров, 225/1</p></bio><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8314-3722</contrib-id><name-alternatives><name xml:lang="en"><surname>Ponomareva</surname><given-names>O. I.</given-names></name><name xml:lang="ru"><surname>Пономарева</surname><given-names>О. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>68 Leningradskaya St., Pesochnyy, Saint Petersburg 197758</p></bio><bio xml:lang="ru"><p>197758 Санкт-Петербург, п. Песочный, ул. Ленинградская, 68</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4714-1228</contrib-id><name-alternatives><name xml:lang="en"><surname>Burovik</surname><given-names>I. A.</given-names></name><name xml:lang="ru"><surname>Буровик</surname><given-names>И. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>6 Akademika Lebedeva St., Saint Petersburg 194044</p></bio><bio xml:lang="ru"><p>194044 Санкт-Петербург, ул. Академика Лебедева, 6</p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1877-8852</contrib-id><name-alternatives><name xml:lang="en"><surname>Tyatkov</surname><given-names>S. A.</given-names></name><name xml:lang="ru"><surname>Тятьков</surname><given-names>С. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>6 Akademika Lebedeva St., Saint Petersburg 194044</p></bio><bio xml:lang="ru"><p>194044 Санкт-Петербург, ул. Академика Лебедева, 6</p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8274-4967</contrib-id><name-alternatives><name xml:lang="en"><surname>Kulish</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Кулиш</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>6 Akademika Lebedeva St., Saint Petersburg 194044</p></bio><bio xml:lang="ru"><p>194044 Санкт-Петербург, ул. Академика Лебедева, 6</p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4996-2927</contrib-id><name-alternatives><name xml:lang="en"><surname>Protoshchak</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Протощак</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>6 Akademika Lebedeva St., Saint Petersburg 194044</p></bio><bio xml:lang="ru"><p>194044 Санкт-Петербург, ул. Академика Лебедева, 6</p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Lyasovich</surname><given-names>G. A.</given-names></name><name xml:lang="ru"><surname>Лясович</surname><given-names>Г. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>2 Kultury Prospekt, Saint Petersburg 194291</p></bio><bio xml:lang="ru"><p>194291 Санкт-Петербург, пр-кт Культуры, 2</p></bio><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7185-1967</contrib-id><name-alternatives><name xml:lang="en"><surname>Novikov</surname><given-names>S. N.</given-names></name><name xml:lang="ru"><surname>Новиков</surname><given-names>С. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>68 Leningradskaya St., Pesochnyy, Saint Petersburg 197758</p></bio><bio xml:lang="ru"><p>197758 Санкт-Петербург, п. Песочный, ул. Ленинградская, 68</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N.N. Petrov 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. Петрова» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">S.M. Kirov Military Medical Academy, Ministry of Defense of Russia</institution></aff><aff><institution xml:lang="ru">ФГБВОУ ВО «Военно-медицинская академия им. С.М. Кирова» Минобороны России</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Terlazurra LLC</institution></aff><aff><institution xml:lang="ru">ООО «Терлазурра»</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Clinical Hospital of the Medical Unit of the Ministry of Internal Affairs of Russia for the City of St. Petersburg and the Leningrad Region</institution></aff><aff><institution xml:lang="ru">Клинический госпиталь ФКУЗ «Медико-санитарная часть МВД России по г. Санкт-Петербургу и Ленинградской области»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-05-09" publication-format="electronic"><day>09</day><month>05</month><year>2025</year></pub-date><volume>21</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>35</fpage><lpage>49</lpage><history><date date-type="received" iso-8601-date="2024-10-08"><day>08</day><month>10</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2025-03-25"><day>25</day><month>03</month><year>2025</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://oncourology.abvpress.ru/oncur/article/view/1851">https://oncourology.abvpress.ru/oncur/article/view/1851</self-uri><abstract xml:lang="en"><p><bold>Aim.</bold> To evaluate the immediate results of perineal implantation of a biodegradable spacer based on stabilized hyaluronic acid (SНA) of non-animal origin as a way to optimize radiation treatment of prostate cancer.</p><p><bold>Materials and methods</bold>. The study included 48 patients with verified low and intermediate risk prostate cancer per NCCN (National Comprehensive Cancer Network) who received five-fraction stereotactic radiotherapy as radical treatment. Prior to radiotherapy, all patients underwent insertion of a prostate-rectum biodegradable spacer (PRBS) based on synthetic SHA in the volume of 4–8 mL.</p><p><bold>Results.</bold> There were no allergic and inflammatory reactions of tissues to the chemical composition of the implanted PRBS. Despite the invasive nature of the procedure, we did not observe any cases of infectious complications.</p><p>SНA used in the study demonstrated high levels of hydration (swelling) equal to 24.4 ± 1.5 (20.7–27.3) %, as well as temporal and spatial stability, which determined its optimal characteristics for use as a radiotherapeutic spacer. In all 48 patients, the projected distance (≥1 cm) between the prostate gland and the anterior wall of the rectum was achieved before the start of irradiation. The administration of 4 mL of SНA made it possible to achieve optimal symmetry of the formed space only in one (16.7 %) patient. An increase in the implant volume of the polymer to 6 mL increased the number of such cases to 28.6 %, and after injection of 8 mL it increased to 57 %.</p><p>The use of PRBS made it possible to reduce radiation dose to the rectum from 21.5 % (D<sub>0.1cc</sub> (dose per 0.1 cm<sup>3 </sup>of rectum)) (р &lt;0.0001) to 92.8 % (V<sub>75 %</sub> (volume receiving 75 % or more of the prescribed dose)) (р &lt;0.0001). Dose reduction for one of the most clinically validated parameters – D<sub>2cc</sub> (dose to 2 cm<sup>3</sup> of rectum)) was 31.5 % (р &lt;0.0001) on average.</p><p><bold>Conclusion.</bold> Perineal implantation of a non-animal SНA (Russia) as a radiotherapy spacer in patients with prostate cancer demonstrates excellent safety and efficacy profiles.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель исследования</bold> – оценить непосредственные результаты промежностной имплантации биодеградируемого спейсера на основе стабилизированной гиалуроновой кислоты (СГК) неживотного происхождения как способа оптимизации лучевого лечения рака предстательной железы.</p><p><bold>Материалы и методы</bold>. В исследование вошли 48 пациентов с верифицированным раком предстательной железы групп низкого и промежуточного риска по NCCN (National Comprehensive Cancer Network, Национальная сеть по борьбе с раком), которым в качестве радикального лечения проводилась 5-фракционная стереотаксическая лучевая терапия. На этапе предлучевой подготовки выполнено промежностное введение отечественного парапростатического биодеградируемого спейсера (ПБС) на основе СГК неживотного происхождения в объеме 4–8 мл.</p><p><bold>Результаты</bold>. Не отмечено аллергических и воспалительных реакций тканей на химический состав имплантируемого ПБС, а также не зарегистрировано каких-либо инфекционно-воспалительных процессов, обусловленных инвазивностью процедуры.</p><p>Применяемая в исследовании СГК продемонстрировала высокие показатели гидратации (набухания), равные 24,4 ± 1,5 (20,7–27,3) %, а также временно́й и пространственной стабильности, что обусловило ее оптимальные характеристики для использования в качестве радиотерапевтического спейсера. У всех 48 больных удалось достигнуть расстояния между предстательной железой и передней стенкой прямой кишки ≥1 см по меньшей мере в одной из точек измерения. Введение 4 мл СГК позволило получить оптимальную симметричность формируемого пространства лишь у 1 (16,7 %) пациента. Увеличение имплантируемого объема полимера до 6 мл повысило число таких наблюдений до 28,6 %, а 8 мл – до 57 %.</p><p>Использование ПБС позволило снизить величину радиационной нагрузки на область прямой кишки от 21,5 % (D<sub>0,1cc</sub> (доза, подводимая к 0,1 см<sup>3</sup> прямой кишки)) (р &lt;0,0001) до 92,8 % (V<sub>75 %</sub> (объем, получающий 75 % и более предписанной дозы)) (р &lt;0,0001). Редукция дозы по одному из наиболее клинически валидизированных показателей D<sub>2cc</sub> (доза, подводимая к 2 см<sup>3</sup> прямой кишки) составила в среднем 31,5 % (р &lt;0,0001).</p><p><bold>Заключение.</bold> Промежностная имплантация отечественного изделия медицинского назначения на основе СГК неживотного происхождения в качестве радиотерапевтического спейсера у больных раком предстательной железы демонстрирует превосходные профили безопасности и эффективности.</p></trans-abstract><kwd-group xml:lang="en"><kwd>prostate cancer</kwd><kwd>radiation therapy</kwd><kwd>spacer</kwd><kwd>hyaluronic acid</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рак предстательной железы</kwd><kwd>лучевая терапия</kwd><kwd>спейсер</kwd><kwd>гиалуроновая кислота</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The study was performed without external funding</funding-statement><funding-statement xml:lang="ru">Исследование проведено без спонсорской поддержки</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Mariados N., Sylvester J., Shah D. et al. 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