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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="review-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">N.N. Priorov Journal of Traumatology and Orthopedics</journal-id><journal-title-group><journal-title xml:lang="en">N.N. Priorov Journal of Traumatology and Orthopedics</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник травматологии и ортопедии им. Н.Н. Приорова</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-8678</issn><issn publication-format="electronic">2658-6738</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">636196</article-id><article-id pub-id-type="doi">10.17816/vto636196</article-id><article-id pub-id-type="edn">SQRBBE</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Reviews</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Обзоры</subject></subj-group><subj-group subj-group-type="article-type"><subject>Review Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">From acquired flatfoot to progressive collapsing foot deformity: a review of classifications</article-title><trans-title-group xml:lang="ru"><trans-title>От приобретённого плоскостопия до прогрессирующей коллапсирующей деформации стопы: обзор классификаций</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3829-5524</contrib-id><contrib-id contrib-id-type="spin">9035-8198</contrib-id><name-alternatives><name xml:lang="en"><surname>Mursalov</surname><given-names>Anatoly K.</given-names></name><name xml:lang="ru"><surname>Мурсалов</surname><given-names>Анатолий Камалович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>tamerlanmursalov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-1507-0606</contrib-id><contrib-id contrib-id-type="spin">2384-9328</contrib-id><name-alternatives><name xml:lang="en"><surname>Ivanov</surname><given-names>Konstantin S.</given-names></name><name xml:lang="ru"><surname>Иванов</surname><given-names>Константин Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>8orthocito@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7718-1872</contrib-id><name-alternatives><name xml:lang="en"><surname>Dzyuba</surname><given-names>Alexey M.</given-names></name><name xml:lang="ru"><surname>Дзюба</surname><given-names>Алексей Михайлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>minzdrav2008@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-7954-503X</contrib-id><contrib-id contrib-id-type="spin">7472-9278</contrib-id><name-alternatives><name xml:lang="en"><surname>Rogova</surname><given-names>Mariya S.</given-names></name><name xml:lang="ru"><surname>Рогова</surname><given-names>Мария Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>m.rogova24@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Priorov National Medical Research Centre of Traumatology and Orthopedics</institution></aff><aff><institution xml:lang="ru">Национальный медицинский исследовательский центр травматологии и ортопедии им. Н.Н. Приорова</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-08-13" publication-format="electronic"><day>13</day><month>08</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-10-05" publication-format="electronic"><day>05</day><month>10</month><year>2025</year></pub-date><volume>32</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>698</fpage><lpage>706</lpage><history><date date-type="received" iso-8601-date="2024-09-18"><day>18</day><month>09</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2025-07-03"><day>03</day><month>07</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Эко-Вектор</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-10-05"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://eco-vector.com/for_authors.php#07</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/0869-8678/article/view/636196">https://journals.eco-vector.com/0869-8678/article/view/636196</self-uri><abstract xml:lang="en"><p>Flatfoot deformity has historically been a complex problem, characterized by a combination of multiplanar deviations. To date, a wide range of classifications has been proposed, based on various principles—from posterior tibial tendon dysfunction, historically considered the primary cause of deformity, to segmentation by foot regions and specific types of deformities within them. A major challenge lies in the fact that foot deformity, as described below, does not follow a linear pattern, and various deformity combinations frequently occur, complicating its systematization. The work aimed to analyze existing and most widely used classifications of flatfoot deformity that have been proposed at different times and remain relevant in foot and ankle surgery, with emphasis on their features and limitations. A scientific data review was conducted using <italic>PubMed</italic>, <italic>eLIBRARY.RU</italic>, and <italic>CyberLeninka</italic> databases with the search terms <italic>классификация плосковальгусной деформации</italic> / <italic>classification of flatfoot deformity</italic> and <italic>flatfoot deformity</italic>. A total of 12 sources were selected for the review. The analyzed scientific data covered the period from 1988 to 2025. In the course of the review, an evident trend was identified toward more detailed segmentation of the deformity by different regions of the foot and the types of abnormalities within them. We observed a shift from hierarchical to faceted classifications, reflecting attempts to encompass the wide variability of deformities across all foot regions and their combinations encountered in clinical practice. And despite numerous attempts at systematization, there is still no universal classification that fully reflects all aspects of flatfoot deformity and satisfies the needs of clinicians in determining patient management strategies for this condition.</p></abstract><trans-abstract xml:lang="ru"><p>Плосковальгусная деформация стопы исторически является сложной проблемой, характеризующейся сочетанием деформаций во множестве плоскостей. На текущий момент предложено большое количество классификаций, построенных на различных принципах: от дисфункции сухожилия задней большеберцовой мышцы, которая исторически считалась первопричиной деформации, до сегментации по различным отделам и видам деформации в них. Проблемой является тот факт, что деформация стопы, как будет описано ниже, не носит линейный характер и зачастую возможны различные комбинации деформаций, что вызывает трудности при их систематизации. Целью данной статьи был анализ имеющихся и наиболее популярных классификаций плосковальгусной деформации стопы, которые были предложены в различное время и имеют значимость в хирургии стопы и голеностопного сустава, с описанием их особенностей и лимитов. Был произведён обзор статей с использованием для поиска данных PubMed, eLibrary, CyberLeninka по запросам «классификация плосковальгусной деформации», «classification of flat foot deformity», «flatfoot deformity». Для обзора было отобрано 12 источников. Временной интервал анализируемой литературы — 1988–2025 гг. В ходе обзора было выявлено наличие очевидной тенденции к более детальной сегментации деформации по различным отделам стопы и видам нарушений в них. Мы наблюдаем, как происходит смещение от иерархической классификации к фасетной, что обусловлено попыткой охвата широкой вариативности деформаций всех отделов стопы и их сочетаний, которая может встречаться в клинической практике. И несмотря на многочисленные попытки систематизации, до сих пор не существует универсальной классификации, которая полностью отражала бы все аспекты плосковальгусной деформации стопы и удовлетворяла потребности клиницистов, определяя тактику лечения пациентов с данной патологией.</p></trans-abstract><kwd-group xml:lang="en"><kwd>flatfoot deformity</kwd><kwd>progressive collapsing foot deformity</kwd><kwd>posterior tibial tendon</kwd><kwd>classification</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>плосковальгусная деформация стопы</kwd><kwd>прогрессирующая коллапсирующая деформация стопы</kwd><kwd>сухожилие задней большеберцовой мышцы</kwd><kwd>классификация</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Johnson KA, Strom DE. Tibialis posterior tendon dysfunction. Clin Orthop Relat Res. 1989;(239):196–206.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Myerson MS. 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