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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">medgen</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинская генетика</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Genetics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-7998</issn><publisher><publisher-name>Publishing House «Genius Media» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25557/2073-7998.2026.01.52-59</article-id><article-id custom-type="elpub" pub-id-type="custom">medgen-3377</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>КЛИНИЧЕСКИЙ СЛУЧАЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL CASE</subject></subj-group></article-categories><title-group><article-title>Случай MYH3-ассоциированного синдрома контрактур, птеригий  и спондилокарпотарзального синостоза 1В типа (CPSFS1B):  пример ограничений высокопроизводительного секвенирования</article-title><trans-title-group xml:lang="en"><trans-title>A case of MYH3-associated contractures, pterygias and spondylocarpotarsal fusion syndrome type 1B (CPSFS1B):  an example of the limitations of next-generation sequencing</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абузова</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Abuzova</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Абузова Анастасия Сергеевна</p><p>194100, г. Санкт-Петербург, ул. Литовская, д. 2</p></bio><bio xml:lang="en"><p>Anastasia S. Abuzova</p><p>2, Litovskaya st., St. Petersburg, 194100</p></bio><email xlink:type="simple">abuzova.a.s@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Демчук</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Demchuk</surname><given-names>Y. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194100, г. Санкт-Петербург, ул. Литовская, д. 2</p></bio><bio xml:lang="en"><p>2, Litovskaya st., St. Petersburg, 194100</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лаптиев</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Laptiev</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194100, г. Санкт-Петербург, ул. Литовская, д. 2</p></bio><bio xml:lang="en"><p>2, Litovskaya st., St. Petersburg, 194100</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Корзун</surname><given-names>П. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Korzun</surname><given-names>P. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194100, г. Санкт-Петербург, ул. Литовская, д. 2</p></bio><bio xml:lang="en"><p>2, Litovskaya st., St. Petersburg, 194100</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Биннатова</surname><given-names>Д. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Binnatova</surname><given-names>D. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194100, г. Санкт-Петербург, ул. Литовская, д. 2</p></bio><bio xml:lang="en"><p>2, Litovskaya st., St. Petersburg, 194100</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Харченко</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kharchenko</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>191015, г. Санкт-Петербург, ул. Кирочная, д. 41</p></bio><bio xml:lang="en"><p>41, Kirochnaya st., Saint-Petersburg, 191015</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Стрекалов</surname><given-names>Д. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Strekalov</surname><given-names>D. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194100, г. Санкт-Петербург, ул. Литовская, д. 2</p></bio><bio xml:lang="en"><p>2, Litovskaya st., St. Petersburg, 194100</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малышева</surname><given-names>К. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Malysheva</surname><given-names>C. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194100, г. Санкт-Петербург, ул. Литовская, д. 2</p></bio><bio xml:lang="en"><p>2, Litovskaya st., St. Petersburg, 194100</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Навроцкая</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Navrotskaya</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>680000, г. Хабаровск, ул. Муравьева-Амурского, д. 35</p></bio><bio xml:lang="en"><p>35, Muravieva-Amyrskogo st., Khabarovsk, 680000</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Суспицын</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Suspitsin</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194100, г. Санкт-Петербург, ул. Литовская, д. 2</p></bio><bio xml:lang="en"><p>2, Litovskaya st., St. Petersburg, 194100</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Имянитов</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Imyanitov</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194100, г. Санкт-Петербург, ул. Литовская, д. 2</p></bio><bio xml:lang="en"><p>2, Litovskaya st., St. Petersburg, 194100</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный педиатрический медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St. Petersburg State Pediatric Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Северо-западный государственный медицинский университет имени И.И. Мечникова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>North-Western State Medical University named after I.I. Mechnikov</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Дальневосточный государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Far Eastern State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>09</day><month>02</month><year>2026</year></pub-date><volume>25</volume><issue>1</issue><fpage>52</fpage><lpage>59</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Абузова А.С., Демчук Ю.А., Лаптиев С.А., Корзун П.Р., Биннатова Д.О., Харченко Т.В., Стрекалов Д.Л., Малышева К.С., Навроцкая П.В., Суспицын Е.Н., Имянитов Е.Н., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Абузова А.С., Демчук Ю.А., Лаптиев С.А., Корзун П.Р., Биннатова Д.О., Харченко Т.В., Стрекалов Д.Л., Малышева К.С., Навроцкая П.В., Суспицын Е.Н., Имянитов Е.Н.</copyright-holder><copyright-holder xml:lang="en">Abuzova A.S., Demchuk Y.A., Laptiev S.A., Korzun P.R., Binnatova D.O., Kharchenko T.V., Strekalov D.L., Malysheva C.S., Navrotskaya P.V., Suspitsin E.N., Imyanitov E.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.medgen-journal.ru/jour/article/view/3377">https://www.medgen-journal.ru/jour/article/view/3377</self-uri><abstract><p>Дефекты тяжелых цепей миозина (MyHC) являются причинами целого ряда наследственных заболеваний. Фенотипические различия между разными нозологиями этой группы ассоциированы с особенностями экспрессии генов MyHC (MYH1, MYH2, MYH3, MYH7, MYH8) в мышечных клетках в разные периоды онтогенеза. Патогенные варианты в гене MYH3 приводят к более тяжелой синдромальной патологии, характеризующейся низким ростом, формированием сколиоза и контрактур суставов. При этом выделяют 4 фенотипа, имеющие свои отличительные признаки.</p><p>В данной работе представлен пациент с низкорослостью, аномалиями позвоночника и контрактурами крупных суставов, у которого в результате клинического секвенирования экзома выявлен гетерозиготный вариант с.4956+1G&gt;A в гене MYH3. Поскольку тяжесть заболевания клинически более соответствовала аутосомно-рецессивной форме, был проведен дополнительный анализ некодирующих участков гена MYH3, который выявил патогенный вариант с.–9+1G&gt;A. Этот пример иллюстрирует необходимость включения ряда некодирующих участков генома, содержащих известные патогенные варианты, в диагностические панели. Кроме того, особенностью описанного нами пациента является наличие дополнительной причины низкорослости – соматотропной недостаточности. </p></abstract><trans-abstract xml:lang="en"><p>Myosin heavy chain (MyHC) defects cause a variety of hereditary diseases. Phenotypic differences between various entities in this group are associated with patterns of MyHC gene expression (MYH1, MYH2, MYH3, MYH7, MYH8) in muscle cells at different stages of development. Pathogenic variants in the MYH3 gene lead to a more severe syndromic pathology characterized by short stature, scoliosis and joint contractures phenotypes. There are 4 distinctive phenotypes with their own features.</p><p>This work presents a patient with short stature, spinal anomalies, large joint contractures and clinical exome sequencing revealed a heterozygous variant c.4956+1G&gt;A in the MYH3 gene. Because the clinical severity of the disease was more consistent with the autosomal recessive form, additional analysis of the noncoding regions of the MYH3 gene was performed, the pathogenic variant c.-9+1G&gt;A was revealed. This example illustrates the importance to include several noncoding regions of the genome with known pathogenic variants in diagnostic panels. Furthermore, a unique feature of the patient we described is the presence of an additional cause of short stature as somatotropic deficiency.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>MYH3</kwd><kwd>миозинопатии</kwd><kwd>контрактуры суставов</kwd><kwd>птеригии</kwd><kwd>сращение позвонков</kwd><kwd>низкорослость</kwd><kwd>молекулярногенетическая диагностика</kwd></kwd-group><kwd-group xml:lang="en"><kwd>MYH3</kwd><kwd>myosinopathies</kwd><kwd>joint contractures</kwd><kwd>pterygias</kwd><kwd>vertebral fusion</kwd><kwd>short stature</kwd><kwd>molecular genetics diagnostics</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке гранта РНФ 24-45-00067.</funding-statement><funding-statement xml:lang="en">The research was financially supported by the Russian Science Foundation grant 24-45-00067.</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">Tajsharghi H., Oldfors A. 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