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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">Russian Journal of Allergy</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Allergy</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский Аллергологический Журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1810-8830</issn><issn publication-format="electronic">2686-682X</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">17086</article-id><article-id pub-id-type="doi">10.36691/RJA17086</article-id><article-id pub-id-type="edn">NEJXWE</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Case reports</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинические случаи</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">Long-term prevention of hereditary angioedema in young children</article-title><trans-title-group xml:lang="ru"><trans-title>Долгосрочная профилактика наследственного ангиоотека у ребенка раннего возраста</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5039-8473</contrib-id><contrib-id contrib-id-type="spin">9722-7961</contrib-id><name-alternatives><name xml:lang="en"><surname>Pampura</surname><given-names>Alexander N.</given-names></name><name xml:lang="ru"><surname>Пампура</surname><given-names>Александр Николаевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><email>apampura@pedklin.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1606-205X</contrib-id><contrib-id contrib-id-type="spin">2063-7973</contrib-id><name-alternatives><name xml:lang="en"><surname>Latysheva</surname><given-names>Elena A.</given-names></name><name xml:lang="ru"><surname>Латышева</surname><given-names>Елена Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>д-р мед. наук</p></bio><email>ealat@mail.ru</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1697-7425</contrib-id><contrib-id contrib-id-type="spin">5418-4330</contrib-id><name-alternatives><name xml:lang="en"><surname>Tarshina</surname><given-names>Elena A.</given-names></name><name xml:lang="ru"><surname>Таршина</surname><given-names>Елена Алексеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>maiorova.1994@yandex.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</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский клинический институт педиатрии и детской хирургии имени академика Ю.Е. Вельтищева (Институт Вельтищева)</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Morozov Children’s City Clinical Hospital</institution></aff><aff><institution xml:lang="ru">Морозовская детская городская клиническая больница</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Russian Medical Academy of Continuous Professional Education</institution></aff><aff><institution xml:lang="ru">Российская медицинская академия непрерывного профессионального образования</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">National Research Center — Institute of Immunology Federal Medical-Biological Agency</institution></aff><aff><institution xml:lang="ru">Государственный научный центр «Институт иммунологии»</institution></aff></aff-alternatives><aff-alternatives id="aff5"><aff><institution xml:lang="en">The Russian National Research Medical University named after N.I. Pirogov</institution></aff><aff><institution xml:lang="ru">Российский национальный исследовательский медицинский университет имени Н.И. Пирогова</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2026-04-17" publication-format="electronic"><day>17</day><month>04</month><year>2026</year></pub-date><pub-date date-type="pub" iso-8601-date="2026-05-25" publication-format="electronic"><day>25</day><month>05</month><year>2026</year></pub-date><volume>23</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>229</fpage><lpage>237</lpage><history><date date-type="received" iso-8601-date="2025-11-26"><day>26</day><month>11</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2026-04-01"><day>01</day><month>04</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, ABV-press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, АБВ-пресс</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">ABV-press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2028-05-25"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://rusalljournal.ru/raj/about/submissions#copyrightNotice</ali:license_ref></license></permissions><self-uri xlink:href="https://rusalljournal.ru/raj/article/view/17086">https://rusalljournal.ru/raj/article/view/17086</self-uri><abstract xml:lang="en"><p>We present a clinical case of early-onset and severe hereditary angioedema type 1, caused by a pathogenic variant in the <italic>SERPING1</italic> gene, in a two-year-old girl. Hereditary angioedema onset occurred at 18 months, which is extremely early for this disorder. The disease onset was characterized by severe clinical manifestations: frequent, debilitating episodes of angioedema of the face, upper and lower extremities (over 8 months, the child experienced 14 episodes of angioedema: 5 in the face and 9 involving peripheral sites). Due to such an early onset and severe course of hereditary angioedema, long-term prophylaxis with lanadelumab was initiated. After more than 5 months of therapy, the child has not experienced a single episode of angioedema, despite exposure to provoking factors. No side effects were observed.</p> <p>In the literature, only five clinical cases with onset and a definitive diagnosis of hereditary angioedema in children under 24 months of age, with only one of the five requiring long-term prophylaxis. Thus, we present a unique clinical example of the successful use of lanadelumab as long-term prophylaxis in early childhood.</p></abstract><trans-abstract xml:lang="ru"><p>Рассмотрен клинический случай ранней манифестации и тяжелого течения наследственного ангиоотека I типа, обусловленного патогенным вариантом в гене <italic>SERPING1</italic>, у девочки 2-летнего возраста. Дебют наследственного ангиоотека произошел в 1,5 года, что чрезвычайно рано для данной патологии. Манифестация с выраженными клиническими проявлениями: частыми, изнуряющими эпизодами ангиоотеков лица, верхних и нижних конечностей (за 8 мес у ребенка зарегистрировано 14 эпизодов ангиоотеков: 5 в области лица и 9 периферических). В связи с ранней манифестацией и тяжелым течением наследственного ангиоотека инициирована долгосрочная профилактика препаратом ланаделумаб. По прошествии более 5 мес терапии у ребенка не отмечалось ни одного эпизода ангиоотека, несмотря на воздействие провоцирующих факторов. Побочных эффектов также не наблюдалось.</p> <p>В литературе найдено описание 5 клинических случаев с дебютом и достоверно установленным диагнозом наследственного ангиоотека у детей младше 24 мес, при этом долгосрочная профилактика потребовалась только 1 ребенку. Таким образом, в статье представлен уникальный клинический пример успешного использования ланаделумаба в качестве долгосрочной профилактики у ребенка раннего возраста.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hereditary angioedema</kwd><kwd>lanadelumab</kwd><kwd>long-term prophylaxis</kwd><kwd>early childhood</kwd><kwd>early manifestation</kwd><kwd>case report</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>наследственный ангиоотек</kwd><kwd>ланаделумаб</kwd><kwd>долгосрочная профилактика</kwd><kwd>дети раннего возраста</kwd><kwd>ранняя манифестация</kwd><kwd>клинический случай</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Sinnathamby ES, Issa PP, Roberts L, et al. Hereditary angioedema: diagnosis, clinical implications, and pathophysiology. Adv Ther. 2023;40(3):814–827. doi: 10.1007/s12325-022-02401-0 EDN: RKZMPM</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Nygren A, Nordenfelt P, Lindfors A, et al. Swedish children with hereditary angioedema report good overall health and quality of life despite symptoms. Acta Paediatr. 2016;105(5):529–534. doi: 10.1111/apa.13345</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Savarese L, Bova M, De Falco R, et al. Emotional processes and stress in children affected by hereditary angioedema with C1-inhibitor deficiency: a multicenter, prospective study. Orphanet J Rare Dis. 2018;13(1):115. doi: 10.1186/s13023-018-0871-x EDN: LSZFOY</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Farkas H, Martinez-Saguer I, Bork K, et al. International consensus on the diagnosis and management of pediatric patients with hereditary angioedema with C1 inhibitor deficiency. Allergy. 2017;72(2):300–313. doi: 10.1111/all.13001</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Staikuniene-Kozonis J, Staikunaite J, Gasiuniene E, Sematonyte J. Case report: early presentation of hereditary angioedema symptoms in a 2-year-old boy. Front Pediatr. 2024;12:1408110. doi: 10.3389/fped.2024.1408110 EDN: DOETDF</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Martinez-Saguer I, Farkas H. Erythema marginatum as an early symptom of hereditary angioedema: case report of 2 newborns. Pediatrics. 2016;137(2):e20152411. doi: 10.1542/peds.2015-2411</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Giardino F, Cicardi M, Neri S. Use of subcutaneous-C1 INH for acute therapy and prophylaxis of a child with HAE. Pediatr Allergy Immunol. 2015;26(3):296–297. doi: 10.1111/pai.12364</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Chagas K de N, Arruk VG, Andrade ME, et al. Angioedema hereditário: considerações sobre terapia. Rev Assoc Med Bras. 2004;50(3):314–319. (In Portuguese) doi: 10.1590/s0104-42302004000300041</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Guarino S, Perricone C, Guarino MD, et al. Gonadal mosaicism in hereditary angioedema. Clin Genet. 2006;70(1):83–85. doi: 10.1111/j.1399-0004.2006.00643.x</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Pagnier A, Dermesropian A, Kevorkian-Verguet C, et al. Hereditary angioedema in children: review and practical perspective for clinical management. Pediatr Allergy Immunol. 2024;35(12):e14268. doi: 10.1111/pai.14268 EDN: ILFRZL</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Maurer M, Magerl M, Betschel S, et al. The international WAO/EAACI guideline for the management of hereditary angioedema — the 2021 revision and update. Allergy. 2022;77(7):1961–1990. doi: 10.1111/all.15214 EDN: FOPZTW</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Henao MP, Kraschnewski JL, Kelbel T, Craig TJ. Diagnosis and screening of patients with hereditary angioedema in primary care. Ther Clin Risk Manag. 2016;12(2):701–711. doi: 10.2147/TCRM.S86293</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Наследственный ангиоотек. Клинические рекомендации. Российская ассоциация аллергологов и клинических иммунологов, Союз педиатров России, Ассоциация медицинских генетиков, Национальная ассоциация экспертов в области первичных иммунодефицитов. 2024. Режим доступа: https://cr.minzdrav.gov.ru/view-cr/267_2 (дата обращения: 17.09.2025)</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Maurer M, Lumry WR, Li HH, et al. Lanadelumab in patients 2 to less than 12 years old with hereditary angioedema: results from the phase 3 SPRING study. J Allergy Clin Immunol Pract. 2024;12(1):201–211.e6. doi: 10.1016/j.jaip.2023.09.009 EDN: TAZGBF</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Lanadelumab. Available from: https://www.drugs.com/lanadelumab.html (accessed 17.09.2025)</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Mendivil J, Malmenäs M, Haeussler K., et al. Indirect comparison of lanadelumab and intravenous C1-INH using data from the HELP and CHANGE studies: bayesian and frequentist analyses. Drugs RD. 2021;21(1):113–121. doi: 10.1007/s40268-021-00337-4 EDN: AGLSJX</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Watt M, Goldgrub R, Malmenäs M, Haeussler K. Indirect treatment comparison of lanadelumab and a C1-esterase inhibitor in pediatric patients with hereditary angioedema. J Comp Eff Res. 2025;14(2):e240110. doi: 10.57264/cer-2024-0110 EDN: GTVJIJ</mixed-citation></ref></ref-list></back></article>
