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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">Pediatrics. Consilium Medicum</journal-id><journal-title-group><journal-title xml:lang="en">Pediatrics. Consilium Medicum</journal-title><trans-title-group xml:lang="ru"><trans-title>Педиатрия. Consilium Medicum</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-6630</issn><issn publication-format="electronic">2658-6622</issn><publisher><publisher-name xml:lang="en">Consilium Medicum</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">678091</article-id><article-id pub-id-type="doi">10.26442/26586630.2025.1.203093</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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"><italic>LMX1B</italic>-associated steroid-resistant nephrotic syndrome with focal segmental glomerulosclerosis (case report)</article-title><trans-title-group xml:lang="ru"><trans-title><italic>LMX1B</italic>-ассоциированный стероидокторезистентный нефротический синдром c фокально-сегментарным гломерулосклерозом (клиническое наблюдение)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0702-4932</contrib-id><contrib-id contrib-id-type="scopus">57193669037</contrib-id><contrib-id contrib-id-type="spin">5171-4177</contrib-id><name-alternatives><name xml:lang="en"><surname>Prikhodina</surname><given-names>Larisa S.</given-names></name><name xml:lang="ru"><surname>Приходина</surname><given-names>Лариса Серафимовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.)</p> <p> </p></bio><bio xml:lang="ru"><p>доктор медицинских наук, рук. отд. наследственных и приобретенных болезней почек им. проф. М.С. Игнатовой</p> <p> </p></bio><email>Prikhodina@rambler.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Stolyarevich</surname><given-names>Ekaterina S.</given-names></name><name xml:lang="ru"><surname>Столяревич</surname><given-names>Екатерина Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>доктор медицинских наук, проф. кафедры нефрологии, патоморфолог</p></bio><email>Prikhodina@rambler.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Povilaitite</surname><given-names>Patricia E.</given-names></name><name xml:lang="ru"><surname>Повилайтите</surname><given-names>Патриция Эдмундовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), Pathological and Anatomical Bureau</p></bio><bio xml:lang="ru"><p>канд. биол. наук, рук., зав. отделением высокотехнологичных методов диагностики с лабораториями молекулярной биологии, электронной микроскопии, иммуноморфологии, врач клинической и лабораторной диагностики</p></bio><email>Prikhodina@rambler.ru</email><xref ref-type="aff" rid="aff5"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Veltischev Research and Clinical Institute for Pediatrics and Pediatric Surgery of the Pirogov Russian National Research Medical University (Pirogov University)</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский клинический институт педиатрии и детской хирургии им. акад. Ю.Е. Вельтищева – ОСП ФГАОУ ВО «Российский национальный исследовательский медицинский университет им. Н.И. Пирогова» Минздрава России (Пироговский Университет)</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Russian Medical Academy of Continuous Professional Education</institution></aff><aff><institution xml:lang="ru">ФГБОУ ДПО «Российская медицинская академия непрерывного профессионального образования» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Russian University of Medicine</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Российский университет медицины» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">City Clinical Hospital No. 52</institution></aff><aff><institution xml:lang="ru">ГБУЗ «Городская клиническая больница №52» Департамента здравоохранения г. Москвы</institution></aff></aff-alternatives><aff-alternatives id="aff5"><aff><institution xml:lang="en">Pathological and Anatomical Bureau</institution></aff><aff><institution xml:lang="ru">ГБУ РО «Патолого-анатомическое бюро»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-04-04" publication-format="electronic"><day>04</day><month>04</month><year>2025</year></pub-date><volume>1</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>38</fpage><lpage>43</lpage><history><date date-type="received" iso-8601-date="2025-04-03"><day>03</day><month>04</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-04-03"><day>03</day><month>04</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Consilium Medicum</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, ООО "Консилиум Медикум"</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Consilium Medicum</copyright-holder><copyright-holder xml:lang="ru">ООО "Консилиум Медикум"</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-sa/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://pediatria.orscience.ru/2658-6630/article/view/678091">https://pediatria.orscience.ru/2658-6630/article/view/678091</self-uri><abstract xml:lang="en"><p>Pathogenic variants in the <italic>LMX1B</italic> gene cause nail-patella syndrome, characterized by dysplasia of the patella, nails and elbows, and renal damage with focal segmental glomerulosclerosis (FSGS) with specific ultrastructural lesions of the glomerular basal membrane (GBM). We present a clinical observation of a girl with <italic>LMX1B</italic>-associated steroid-resistant nephrotic syndrome without the extrarenal characteristic of nail-patella syndrome with specific ultrastructural changes of the GBM. The presented clinical observation emphasizes the necessity to exclude proteinuria in family members with a child with FSGS and to perform molecular genetic study in all children with FSGS before prescribing immunosuppressive therapy with inclusion of <italic>LMX1B</italic> gene even in case of isolated kidney pathology.</p></abstract><trans-abstract xml:lang="ru"><p>Патогенные варианты в гене <italic>LMX1B</italic> вызывают синдром ногтей-надколенника (nail-patella), характеризующийся дисплазией надколенников, ногтей и локтей, а также поражением почек с развитием фокально-сегментарного гломерулосклероза со специфическими ультраструктурными поражениями гломерулярной базальной мембраны. Представлено клиническое наблюдение за девочкой с <italic>LMX1B</italic>-ассоциированным стероидокторезистентным нефротическим синдромом (СРНС) без характерных для синдрома ногтей-надколенника экстраренальных проявлений со специфическими ультраструктурными изменениями гломерулярной базальной мембраны. Представленное клиническое наблюдение подчеркивает необходимость исключения протеинурии у членов семьи с ребенком со СРНС, а также проведения молекулярно-генетического исследования у всех детей со СРНС до назначения иммуносупрессивной терапии с включением гена <italic>LMX1B</italic> даже при изолированной патологии почек.</p></trans-abstract><kwd-group xml:lang="en"><kwd>steroid-resistant nephrotic syndrome</kwd><kwd>focal segmental glomerulosclerosis</kwd><kwd>LMX1B gene</kwd><kwd>nail-patella syndrome</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>стероидокторезистентный нефротический синдром</kwd><kwd>фокально-сегментарный гломерулосклероз</kwd><kwd>ген LMX1B</kwd><kwd>синдром ногтей-надколенника</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Beals RK, Eckhardt AL. Hereditary onycho-osteodysplasia (Nail-Patella syndrome). A report of nine kindreds. 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