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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">medbio</journal-id><journal-title-group><journal-title xml:lang="ru">Медико-биологические проблемы жизнедеятельности</journal-title><trans-title-group xml:lang="en"><trans-title>Medical and Biological Problems of Life Activity</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2074-2088</issn><publisher><publisher-name>Республиканский научно-практический центр радиационной медицины и экологии человека</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.58708/2074-2088.2025-4(36)-103-108</article-id><article-id custom-type="elpub" pub-id-type="custom">medbio-485</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>ОБМЕН ОПЫТОМ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>EXPERIENCE EXCHANGE</subject></subj-group></article-categories><title-group><article-title>Случай селективного дефицита иммуноглобулина А, ассоциированного с болезнью Крона</article-title><trans-title-group xml:lang="en"><trans-title>A case of selective immunoglobulin A deficiency associated with Crohn's disease</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>Тихонова</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Tikhonova</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Гомель</p></bio><email xlink:type="simple">stusha25@yandex.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>Гавриленко</surname><given-names>Т. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Gavrilenko</surname><given-names>T. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Гомель</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>Родина</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Rodina</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Гомель</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>ГУ «РНПЦ радиационной медицины и экологии человека»</institution><country>Belarus</country></aff><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>10</day><month>12</month><year>2025</year></pub-date><volume>0</volume><issue>4</issue><fpage>103</fpage><lpage>108</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тихонова Е.С., Гавриленко Т.Е., Родина Е.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Тихонова Е.С., Гавриленко Т.Е., Родина Е.В.</copyright-holder><copyright-holder xml:lang="en">Tikhonova E.S., Gavrilenko T.E., Rodina 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://medbio.ejournal.by/jour/article/view/485">https://medbio.ejournal.by/jour/article/view/485</self-uri><abstract><p>Сегодня селективный дефицит иммуноглобулина А (IgA) является распространённым первичным иммунодефицитом, при этом до настоящего времени не установлено какой генетический дефект приводит к данной патологии. Не удаётся достоверно оценить частоту встречаемости селективного дефицита IgA в популяции, так как в большинстве случаев он протекает бессимптомно и является случайной лабораторной находкой. Данный иммунодефицит может манифестировать различными инфекциями респираторного тракта, желудочно-кишечного тракта, аллергическими и аутоиммунными заболеваниями. Ряд литературных данных показывает, что у пациентов с аутоиммунной патологией в случае наличия селективного дефицита IgA заболевание протекает более агрессивно и имеет худший прогноз. В статье представлен случай манифестации болезни Крона у пациента во взрослом возрасте с селективным дефицитом иммуноглобулина А, выявленном в раннем детстве. Данный пример демонстрирует, что пациенты с первичными иммунодефицитами могут долго не знать о своём заболевании.</p></abstract><trans-abstract xml:lang="en"><p>Selective immunoglobulin A (IgA) deficiency is considered the most common primary immunodeficiency. A specific genetic defect leading to this disease has not yet been identified. The true frequency of selective IgA deficiency in the population is unknown, as it is often asymptomatic and is a random laboratory finding. This immunodeficiency can manifest as respiratory tract infections, gastrointestinal tract infections, allergic disorders, and autoimmune diseases. According to the literature, patients with autoimmune disorders who have selective IgA deficiency have more severe and aggressive disease courses with a poorer prognosis. The clinical example of a combination of selective IgA deficiency and Crohn's disease demonstrates that patients with primary immunodeficiencies may not be aware of their condition for a long time. The article presents a case of Crohn's disease in a patient with selective immunoglobulin A deficiency, which was detected in early childhood.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>первичный иммунодефицит</kwd><kwd>селективный дефицит иммуноглобулина А</kwd><kwd>болезнь Крона</kwd></kwd-group><kwd-group xml:lang="en"><kwd>primary immunodeficiency</kwd><kwd>selective immunoglobulin A deficiency</kwd><kwd>Crohn's disease</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Increasing incidence and prevalence of the inflammatory bowel diseases with time, based on systematic review. / N.A. Molodecky [et al.] // Gastroenterology. – 2012. – № 142. – P. 46–54.</mixed-citation><mixed-citation xml:lang="en">Increasing incidence and prevalence of the inflammatory bowel diseases with time, based on systematic review. / N.A. 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