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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">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">1937</article-id><article-id pub-id-type="doi">10.17650/1726-9776-2026-22-1-71-75</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CLINICAL NOTES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЕ СЛУЧАИ</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">Low-grade oncocytic renal tumor: a clinical case</article-title><trans-title-group xml:lang="ru"><trans-title>Онкоцитарная опухоль почки низкой степени злокачественности: клинический случай</trans-title></trans-title-group></title-group><contrib-group><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><email>galiukurolog@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7464-5926</contrib-id><name-alternatives><name xml:lang="en"><surname>Karpushchenko</surname><given-names>E. G.</given-names></name><name xml:lang="ru"><surname>Карпущенко</surname><given-names>Е. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>galiukurolog@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Peremyshlenko</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Перемышленко</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>galiukurolog@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0221-5681</contrib-id><name-alternatives><name xml:lang="en"><surname>Izmukhanov</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Измуханов</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>galiukurolog@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-8986-999X</contrib-id><name-alternatives><name xml:lang="en"><surname>Galiuk</surname><given-names>Dmitriy A.</given-names></name><name xml:lang="ru"><surname>Галюк</surname><given-names>Дмитрий Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>galiukurolog@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><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="aff2"><aff><institution xml:lang="en">St. Luka’s Clinical Hospital, City Center for Endoscopic Urology and New Technologies</institution></aff><aff><institution xml:lang="ru">СПбГБУЗ «Клиническая больница святителя Луки», Городской центр эндоскопической урологии и новых технологий</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-07-10" publication-format="electronic"><day>10</day><month>07</month><year>2026</year></pub-date><volume>22</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>71</fpage><lpage>75</lpage><history><date date-type="received" iso-8601-date="2025-05-07"><day>07</day><month>05</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2026-02-27"><day>27</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://creativecommons.org/licenses/by/4.0/</ali:license_ref></license></permissions><self-uri xlink:href="https://oncourology.abvpress.ru/oncur/article/view/1937">https://oncourology.abvpress.ru/oncur/article/view/1937</self-uri><abstract xml:lang="en"><p>Low-grade oncocytic renal tumor is an extremely rare and new type of neoplasm. Its distinctive feature is a combination of benign and malignant signs, and the first description of the morphological species dates back to 2019. Since this period, 75 cases have been analyzed in 9 publications, one of which is domestic. Systematic reviews and randomized clinical trials are lacking. Currently, there are no recommendations, protocols for the management and treatment of patients with this rare pathology due to the small amount of data. The article presents a clinical observation of the diagnosis and treatment of a patient with a low-grade oncocytic tumor of the kidney.</p></abstract><trans-abstract xml:lang="ru"><p>Онкоцитарная опухоль почки низкой степени злокачественности – крайне редкая и новая разновидность новообразования. Ее отличительной чертой является сочетание доброкачественных и злокачественных признаков, а первое описание морфологического вида датировано 2019 г. С этого периода в 9 публикациях, из которых одна отечественная, проанализировано 75 случаев заболевания. Систематические обзоры и рандомизированные клинические исследования отсутствуют. В настоящее время нет рекомендаций, протоколов ведения и лечения пациентов с этой редкой патологией ввиду малого количества данных. В статье представлено клиническое наблюдение диагностики и лечения больного с онкоцитарной опухолью почки низкой степени злокачественности.</p></trans-abstract><kwd-group xml:lang="en"><kwd>low-grade oncocytic renal tumor</kwd><kwd>tumor</kwd><kwd>cancer</kwd><kwd>oncocytoma</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>онкоцитарная опухоль почки низкой степени злокачественности</kwd><kwd>опухоль</kwd><kwd>рак</kwd><kwd>онкоцитома</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена без спонсорской поддержки.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Trpkov K., Hes O. New and emerging renal entities: a perspective post-WHO 2016 classification. Histopathology 2019;74(1):31–59. DOI: 10.1111/HIS.13727</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Kravtsov O., Gupta S., Cheville J.C. et al. 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