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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">Head and Neck Tumors</journal-id><journal-title-group><journal-title xml:lang="en">Head and Neck Tumors</journal-title><trans-title-group xml:lang="ru"><trans-title>Опухоли головы и шеи</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2222-1468</issn><issn publication-format="electronic">2411-4634</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">1120</article-id><article-id pub-id-type="doi">10.17650/2222-1468-2026-16-1-12-26</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>DIAGNOSIS AND TREATMENT OF HEAD AND NECK TUMORS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ДИАГНОСТИКА И ЛЕЧЕНИЕ ОПУХОЛЕЙ ГОЛОВЫ И ШЕИ</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">Inverted papilloma of the sphenoid sinus: criteria of operability and algorithm of treatment</article-title><trans-title-group xml:lang="ru"><trans-title>Инвертированная папиллома клиновидной пазухи: критерии резектабельности и алгоритм лечения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2719-5031</contrib-id><name-alternatives><name xml:lang="en"><surname>Nersesyan</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Нерсесян</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nermarina@yahoo.com</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/0009-0003-5924-1634</contrib-id><name-alternatives><name xml:lang="en"><surname>Ghazal</surname><given-names>H.</given-names></name><name xml:lang="ru"><surname>Газаль</surname><given-names>Х.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nermarina@yahoo.com</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/0000-0002-7175-6417</contrib-id><name-alternatives><name xml:lang="en"><surname>Polev</surname><given-names>G. A.</given-names></name><name xml:lang="ru"><surname>Полев</surname><given-names>Г. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nermarina@yahoo.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3309-4683</contrib-id><name-alternatives><name xml:lang="en"><surname>Popadyuk</surname><given-names>V. I.</given-names></name><name xml:lang="ru"><surname>Попадюк</surname><given-names>В. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nermarina@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">RUDN University</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО «Российский университет дружбы народов им. Патриса Лумумбы»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Department of Head &amp; Neck Surgery, Ilyinskaya Hospital</institution></aff><aff><institution xml:lang="ru">Центр хирургии головы и шеи АО «Ильинская больница»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-06-09" publication-format="electronic"><day>09</day><month>06</month><year>2026</year></pub-date><volume>16</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>12</fpage><lpage>26</lpage><history><date date-type="received" iso-8601-date="2026-01-05"><day>05</day><month>01</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-02-04"><day>04</day><month>02</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, ABV-Press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, АБВ-пресс</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">ABV-Press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</copyright-holder><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://ogsh.abvpress.ru/jour/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://ogsh.abvpress.ru/jour/article/view/1120">https://ogsh.abvpress.ru/jour/article/view/1120</self-uri><abstract xml:lang="en"><p><bold>Introduction.</bold> Sphenoid sinus (SS) is a very rare site of inverted papilloma (IP). Surgery of IP located in the SS is complicated due to close proximity of vital structures and high risk of their damage during the operation. Radical surgery involving resection of the primary site of tumor growth and adherence to oncological principles is very complex due to the risk of severe complications. Some authors consider SS IP to be unresectable. Therefore, there are very few publications on this topic in the scientific literature.</p> <p><bold>Aim.</bold> To analyze a case series of treatment of IP located in the SS and resected endoscopically endonasally, as well as compare our data with the results presented in literature.</p> <p><bold>Materials and methods.</bold> Literature data and our experience of treating patients with SS IP which previously were considered unresectable were analyzed. In 7 years, between 2019 and 2025, at the Burdenko National Medical Center of Neurosurgery and Center of Head and Neck Surgery of the Ilinskaya Hospital, 12 patients with this pathology (2 (16.7 %) women and 10 (83.3 %) men) received treatment. Mean patient age was 60 (26–76) years. In 2 (16.7 %) patients with multifocal SS IP growth and recurrence, who underwent multiple previous surgeries, with the initial growth sites in the area of the optic canal and posterior SS wall with its destruction in one case and in the area of lateral SS wall in the other case, squamous cell carcinoma was diagnosed.</p> <p><bold>Results.</bold> All patients underwent endoscopic IP resection. In 9 (75 %) cases, extended sphenoidotomy with resection of the initial IP growth site was performed, in 3 (25 %) of the cases, surgery was performed in 2 stages. Follow-up of 11 patients was 40.2 (26–68) months; 1 patient was lost to follow-up. Recurrence developed in 2 (18.2 %) patients with multicentric IP growth (with diagnosed squamous cell carcinoma). Both patients died (5 and 1.5 years after the surgery). No recurrences were observed in other patients.</p> <p><bold>Conclusion.</bold> Inverted papilloma of the SS is a very rare pathology. Its surgical treatment is complicated and associated with high risk of severe intraoperative complications. These surgeries should be performed by experienced surgeons using intraoperative navigation. The risk of recurrence after SS IP resection is significantly higher (18.2 %) than for IP in other sites. Conversely, high probability of malignant transformation of SS-located IP is present due to impossibility of its radical resection in some cases. For best results, we recommend extended endoscopic access to the SS using intraoperative navigation and multiple-stage surgical intervention in cases when IP cannot be resected in one step. Additionally, regular life-long follow-up of patients after surgery is necessary with frequency of once every 6 months for early detection of recurrence which can be resected endoscopically.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Клиновидная пазуха (КП) – очень редкая локализация инвертированной папилломы (ИП). Хирургия ИП, расположенной в КП, сложна в связи с близким к ней расположением жизненно важных структур и высоким риском их повреждения во время операции. Радикальная операция, предполагающая удаление места исходного роста опухоли и соблюдение онкологических принципов, при данной локализации крайне затруднительна из-за риска развития тяжелых осложнений. Некоторые авторы считают ИП КП нерезектабельными. Поэтому в мировой литературе крайне мало публикаций на эту тему.</p> <p><bold>Цель исследования</bold> – проанализировать серию клинических случаев лечения ИП, расположенных в КП и удаленных эндоскопически эндоназально, а также сопоставить наши данные с результатами, представленными в мировой литературе.</p> <p><bold>Материалы и методы.</bold> Проанализированы данные литературы и наш опыт лечения пациентов с ИП КП, которые раньше считались неоперабельными. За 7 лет, с 2019 по 2025 г., в Национальном медицинском исследовательском центре нейророхирургии им. акад. Н. Н. Бурденко и Центре хирургии головы и шеи Ильинской больницы лечение получили 12 пациентов с данной патологией (2 (16,7 %) женщины и 10 (83,3 %) мужчин). Средний возраст больных составил 60 (26–76) лет. У 2 (16,7 %) пациентов с мультифокальным ростом ИП КП и рецидивом, местом исходного роста в области канала зрительного нерва и задней стенки КП с ее деструкцией в одном случае и в области латеральной стенки КП в другом случае, неоднократно оперированных ранее, диагностирована плоскоклеточная карцинома.</p> <p><bold>Результаты.</bold> Всем больным проведено эндоскопическое удаление ИП. В 9 (75 %) случаях выполнена расширенная сфенотомия с удалением места исходного роста ИП, в 3 (25 %) из них операция проведена в 2 этапа. Период наблюдения 11 пациентов составил 40,2 (26–68) мес; 1 пациент выбыл из-под наблюдения. Рецидив возник у 2 (18,2 %) больных с мультицентрическим ростом ИП (с диагностированной плоскоклеточной карциномой). Оба пациента умерли (через 5 и 1,5 года после операции соответственно). У остальных больных рецидива ИП не наблюдалось.</p> <p><bold>Заключение.</bold> Инвертированная папиллома КП – крайне редкая патология. Ее хирургическое лечение сложно и сопряжено с высоким риском развития тяжелых интраоперационных осложнений. Такие операции должны проводиться опытными хирургами под интраоперационной навигацией. Риск возникновения рецидива после удаления ИП КП существенно выше (18,2 %), чем ИП другой локализации. Вместе с тем существует высокая вероятность злокачественной трансформации ИП, расположенной в КП, в связи с невозможностью в ряде случаев ее радикального удаления. Для достижения лучших результатов мы рекомендуем использовать расширенный эндоскопический доступ к КП под интраоперационной навигацией и проводить хирургическое вмешательство в несколько этапов при невозможности радикального удаления ИП за одну операцию. Также необходимо регулярное, пожизненное наблюдение пациентов после операции с частотой 1 раз в 6 мес для максимально раннего выявления рецидива, который можно удалить эндоскопически.</p></trans-abstract><kwd-group xml:lang="en"><kwd>inverted papilloma</kwd><kwd>sphenoid sinus</kwd><kwd>skull base defect</kwd><kwd>sinonasal inverted papilloma</kwd><kwd>skull base tumor</kwd><kwd>squamous cell carcinoma</kwd><kwd>squamous cell cancer</kwd><kwd>endoscopic resection</kwd><kwd>intraoperative navigation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>инвертированная папиллома</kwd><kwd>клиновидная пазуха</kwd><kwd>дефект основания черепа</kwd><kwd>синоназальная инвертированная папиллома</kwd><kwd>опухоль основания черепа</kwd><kwd>плоскоклеточная карцинома</kwd><kwd>плоскоклеточный рак</kwd><kwd>эндоскопическое удаление</kwd><kwd>интраоперационная навигация</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Som P.M., Curtin H.D. 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