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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">r-n-j</journal-id><journal-title-group><journal-title xml:lang="ru">Российский неврологический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Russian neurological journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2658-7947</issn><issn pub-type="epub">2686-7192</issn><publisher><publisher-name>МИА</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30629/2658-7947-2024-29-5-31-36</article-id><article-id custom-type="elpub" pub-id-type="custom">r-n-j-620</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>ИССЛЕДОВАНИЯ И КЛИНИЧЕСКИЕ НАБЛЮДЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL RESEARCHES AND CASE REPORTS</subject></subj-group></article-categories><title-group><article-title>Фенотипическое разнообразие и трудности диагностики синдрома CANVAS</article-title><trans-title-group xml:lang="en"><trans-title>Phenotypic diversity and difficulties in CANVAS diagnosis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3179-7668</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нужный</surname><given-names>Е. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Nuzhnyi</surname><given-names>E. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">enuzhny@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/0000-0002-2339-8483</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белякова-Бодина</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Belyakova-Bodina</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9419-1159</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абрамычева</surname><given-names>Н. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Abramycheva</surname><given-names>N. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5706-6997</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Филатов</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Filatov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2704-6282</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иллариошкин</surname><given-names>С. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Illarioshkin</surname><given-names>S. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научный центр неврологии</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Center of Neurology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>07</day><month>01</month><year>2025</year></pub-date><volume>29</volume><issue>5</issue><fpage>31</fpage><lpage>36</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Нужный Е.П., Белякова-Бодина А.И., Абрамычева Н.Ю., Филатов А.С., Иллариошкин С.Н., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Нужный Е.П., Белякова-Бодина А.И., Абрамычева Н.Ю., Филатов А.С., Иллариошкин С.Н.</copyright-holder><copyright-holder xml:lang="en">Nuzhnyi E.P., Belyakova-Bodina A.I., Abramycheva N.Y., Filatov A.S., Illarioshkin S.N.</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://www.r-n-j.com/jour/article/view/620">https://www.r-n-j.com/jour/article/view/620</self-uri><abstract><p>Синдром CANVAS (от англ. Cerebellar Ataxia, Neuropathy, Vestibular Areflexia Syndrome) — наследственное медленно прогрессирующее заболевание взрослого возраста, для которого характерно сочетание сенситивной и мозжечковой атаксии, сенсорной полиневропатии и двусторонней вестибулопатии. Причиной данного заболевания в большинстве случаев является биаллельная экспансия AAGGG-повторов в гене RFC1, кодирущем субъединицу 1 фактора репликации С. На сегодняшний день CANVAS является одной из наиболее распространенных в мире форм среди наследственных атаксий с поздним началом. Дифференциальный диагноз данного синдрома проводится с широким кругом наследственных и приобретенных заболеваний, для которых характерно сочетание мозжечково-сенситивной атаксии, полиневропатии и вестибулопатии. В статье приводится описание двух клинических случаев, у которых диагностика синдрома CANVAS вызвало ряд трудностей. Обсуждается фенотипическое разнообразие данного заболевания и роль видеоокулографии в алгоритме обследования данных пациентов и верификации диагноза.</p></abstract><trans-abstract xml:lang="en"><p>Cerebellar ataxia, neuropathy, vestibular areflexia syndrome (CANVAS) is a hereditary slowly progressive adultonset disorder characterized by sersory and cerebellar ataxia, sensory polyneuropathy and bilateral vestibulopathy. In most cases the cause of this disease is biallelic AAGGG-repeat expansion in the RFC1 gene, encoding eplication factor C subunit 1. Today, CANVAS is one of the most common forms among late-onset hereditary ataxias in the world. The differential diagnosis of this syndrome is carried out with a wide range of hereditary and acquired disorders, which are characterized by a combination of cerebellar and sensory ataxia, polyneuropathy and vestibulopathy. The article describes two clinical cases in which the diagnosis of CANVAS caused several diffculties. The phenotypic diversity of this syndrome and the role of videooculography in the diagnostic algorithm and diagnosis verification are discussed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>атаксия</kwd><kwd>полиневропатия</kwd><kwd>вестибулопатия</kwd><kwd>CANVAS</kwd><kwd>ген RFC1</kwd><kwd>фенотип</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ataxia</kwd><kwd>polyneuropathy</kwd><kwd>vestibulopathy</kwd><kwd>CANVAS</kwd><kwd>RFC1 gene</kwd><kwd>phenotype</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке Российского научного фонда (грант РНФ № 24-15-00209).</funding-statement><funding-statement xml:lang="en">The study is supported by grant of the Russian Science Foundation (project № 24-15-00209).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Arteche-López A., Avila-Fernandez A., Damian A., Soengas-Gonda E., de la Fuente R.P. et al. 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