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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">vestim</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия медицинских наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Medical series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1814-6023</issn><issn pub-type="epub">2524-2350</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1814-6023-2026-23-1-39-48</article-id><article-id custom-type="elpub" pub-id-type="custom">vestim-1072</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>КЛИНИЧЕСКАЯ И ЭКСПЕРИМЕНТАЛЬНАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL AND EXPERIMENTAL MEDICINE</subject></subj-group></article-categories><title-group><article-title>Диагностика феохромоцитомы, первичного гиперпаратиреоза и медуллярного рака щитовидной железы как компонентов синдрома множественной эндокринной неоплазии 2А типа</article-title><trans-title-group xml:lang="en"><trans-title>Diagnostics of pheochromocytoma, primary hyperparathyroidism, and medullary thyroid cancer as components of multiple endocrine neoplasia syndrome type 2A</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>Шепелькевич</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Shepelkevich</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шепелькевич Алла Петровна – д-р мед. наук, профессор</p><p>пр. Дзержинского, 83, 220083, г. Минск</p></bio><bio xml:lang="en"><p>Alla P. Shepelkevich – D. Sc. (Med.), Professor</p><p>83, Dzerzhinsky Ave., 220083, Minsk</p></bio><email xlink:type="simple">alla.shepelkevich@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>Дыдышко</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Dydyshko</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дыдышко Юлия Васильевна – канд. мед. наук, доцент</p><p>пр. Дзержинского, 83, 220083, г. Минск</p></bio><bio xml:lang="en"><p>Yulia V. Dydyshko – Ph. D. (Med.), Associate Professor</p><p>83, Dzerzhinsky Ave., 220083, Minsk</p></bio><email xlink:type="simple">yuliadydyshko@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>Юреня</surname><given-names>Е. B.</given-names></name><name name-style="western" xml:lang="en"><surname>Yurenya</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юреня Елена Васильевна – главный врач</p><p>ул. Маяковского, 31, 220006, г. Минск</p></bio><bio xml:lang="en"><p>Elena V. Yurenya – Chief Medical Officer</p><p>31, Mayakovsky Str., 220006, Minsk</p></bio><email xlink:type="simple">yureniaalena@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный медицинский университет</institution></aff><aff xml:lang="en"><institution>Belarusian State Medical University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Минский городской клинический эндокринологический цент</institution></aff><aff xml:lang="en"><institution>Minsk City Clinical Endocrinology Center</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>03</day><month>03</month><year>2026</year></pub-date><volume>23</volume><issue>1</issue><fpage>38</fpage><lpage>48</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шепелькевич А.П., Дыдышко Ю.В., Юреня Е.B., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Шепелькевич А.П., Дыдышко Ю.В., Юреня Е.B.</copyright-holder><copyright-holder xml:lang="en">Shepelkevich A.P., Dydyshko Y.V., Yurenya E.V.</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://vestimed.belnauka.by/jour/article/view/1072">https://vestimed.belnauka.by/jour/article/view/1072</self-uri><abstract><p>Цель исследования – разработка и внедрение в клиническую практику эффективного алгоритма диагностики наследственного медуллярного рака щитовидной железы (МРЩЖ) и его ассоциаций в рамках синдрома множественной эндокринной неоплазии 2А типа (МЭН 2А). Проведен ретроспективный анализ данных 658 пациентов с МРЩЖ из Белорусского канцер-регистра с детализацией клинико-лабораторных и инструментальных параметров. Сформирована и проанализирована база данных 23 пациентов с установленным клиническим диагнозом МЭН 2А. На основе сравнительного анализа популяционных и клинических данных разработан диагностический алгоритм для выявления феохромоцитомы, первичного гиперпаратиреоза и МРЩЖ как компонентов МЭН 2А. Ключевым элементом алгоритма является метод молекулярно-генетического исследования патогенных мутаций в протоонкогене RET. Метод оформлен в виде инструкции по применению и предназначен для диагностики наследственных форм патологии у пробандов и их родственников первой степени родства. Метод внедрен в комплекс медицинских услуг и позволяет оптимизировать раннюю диагностику синдрома МЭН 2А в клинической практике.</p></abstract><trans-abstract xml:lang="en"><p>The article presents the results of a population study conducted by the Oncoendocrinology research group based on the research unit of the Belarusian State Medical University on the task of “Developing and implementing a method for diagnosing medullary thyroid cancer and multiple endocrine neoplasia syndrome type 2A”. Initially, data from 658 patients with medullary thyroid cancer (MTC) from the Belarusian Cancer Registry (BCR) were analyzed, a database of patients with MTC with a detailed description and analysis of clinical, laboratory, and instrumental parameters was formed. A database of patients with a clinical diagnosis of multiple endocrine neoplasia syndrome type 2A (MEN 2A) was also created, including 23 people. An algorithm for diagnosing pheochromocytoma (PHC), primary hyperparathyroidism (PHPT) and MTC as components of MEN 2A has been developed, and instructions for use have been approved for the “Method for Determining Pathogenic Mutations of the RET Proto-Oncogene for Diagnosing Hereditary Medullary Thyroid Cancer, Pheochromocytoma, and Primary Hyperparathyroidism” (Reg. No. 017-0424 dated 13.12.2024), which sets out a method for diagnosing the hereditary form of MTC and MEN 2A syndrome in first-degree relatives of patients with MTC and the presence of pathogenic RET mutations. The method can be used in a complex of medical services aimed at diagnosing the familial form of medullary cancer and MEN 2A syndrome.</p></trans-abstract><kwd-group xml:lang="en"><kwd>pheochromocytoma</kwd><kwd>primary hyperparathyroidism</kwd><kwd>medullary thyroid cancer</kwd><kwd>multiple endocrine neoplasia syndrome type 2A</kwd><kwd>calcitonin</kwd><kwd>RET Proto-Oncogene</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках ГНТП «Научно-техническое обеспечение качества и доступности медицинских услуг», подпрограммы «Злокачественные опухоли» на период 2019–2023 гг. по заданию 03.12 «Разработать и внедрить метод диагностики медуллярного рака щитовидной железы и синдрома множественной эндокринной неоплазии 2А типа».</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of the state scientific and technical program “Scientific and technical support for the quality and availability of medical services”, subprogram “Malignant tumors” for the period 2019–2023 under task 03.12 “Develop and implement a method for diagnosing medullary thyroid cancer and multiple endocrine neoplasia syndrome type 2A”.</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">Thyroid Carcinoma, Version 2.2022, NCCN Clinical Practice Guidelines in Oncology / R. 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