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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">16919</article-id><article-id pub-id-type="doi">10.36691/RJA16919</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">Diagnostics and treatment of urticarial vasculitis associated with COVID-19</article-title><trans-title-group xml:lang="ru"><trans-title>Диагностика и лечение уртикарного васкулита, ассоциированного с COVID-19</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8755-7482</contrib-id><contrib-id contrib-id-type="spin">9933-0496</contrib-id><name-alternatives><name xml:lang="en"><surname>Ishchanka</surname><given-names>Aksana V.</given-names></name><name xml:lang="ru"><surname>Ищенко</surname><given-names>Оксана Владимировна</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>доктор медицинских наук, профессор</p></bio><email>oksana_is200272@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-5648-7882</contrib-id><contrib-id contrib-id-type="spin">7117-9072</contrib-id><name-alternatives><name xml:lang="en"><surname>Shchurok</surname><given-names>Iryna N.</given-names></name><name xml:lang="ru"><surname>Щурок</surname><given-names>Ирина Николаевна</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine), Assistant Professor</p></bio><bio xml:lang="ru"><p>кандидат медицинских наук, доцент</p></bio><email>shchurok.irina@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3739-1474</contrib-id><contrib-id contrib-id-type="spin">7779-3361</contrib-id><name-alternatives><name xml:lang="en"><surname>Chernokov</surname><given-names>Oleg I.</given-names></name><name xml:lang="ru"><surname>Черноков</surname><given-names>Олег Игоревич</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>MD</p></bio><email>chernokov97@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6696-0704</contrib-id><contrib-id contrib-id-type="spin">8993-3484</contrib-id><name-alternatives><name xml:lang="en"><surname>Zakharova</surname><given-names>Volha V.</given-names></name><name xml:lang="ru"><surname>Захарова</surname><given-names>Ольга Вячеславовна</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>MD</p></bio><email>zakharovkan@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2072-077X</contrib-id><contrib-id contrib-id-type="spin">7486-5317</contrib-id><name-alternatives><name xml:lang="en"><surname>Lesnichaya</surname><given-names>Olesya V.</given-names></name><name xml:lang="ru"><surname>Лесничая</surname><given-names>Олеся Васильевна</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine), Assistant Professor</p></bio><bio xml:lang="ru"><p>кандидат медицинских наук, доцент</p></bio><email>5114528@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-0020-4711</contrib-id><contrib-id contrib-id-type="spin">6170-2307</contrib-id><name-alternatives><name xml:lang="en"><surname>Laporevich</surname><given-names>Vera B.</given-names></name><name xml:lang="ru"><surname>Лапоревич</surname><given-names>Вера Борисовна</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>MD</p></bio><email>veralaporevich@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Vitebsk State Order of Peoples’ Friendship Medical University</institution></aff><aff><institution xml:lang="ru">Витебский государственный ордена Дружбы народов медицинский университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Vitebsk Regional Clinical Hospital</institution></aff><aff><institution xml:lang="ru">Витебская областная клиническая больница</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-09-16" publication-format="electronic"><day>16</day><month>09</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2024-10-24" publication-format="electronic"><day>24</day><month>10</month><year>2024</year></pub-date><volume>21</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>404</fpage><lpage>413</lpage><history><date date-type="received" iso-8601-date="2024-02-02"><day>02</day><month>02</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-07-31"><day>31</day><month>07</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Pharmarus Print Media</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Фармарус Принт Медиа</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Pharmarus Print Media</copyright-holder><copyright-holder xml:lang="ru">Фармарус Принт Медиа</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-10-24"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://rusalljournal.ru/raj/article/view/16919">https://rusalljournal.ru/raj/article/view/16919</self-uri><abstract xml:lang="en"><p>Currently, the issue of COVID-19 infection remains. The potential consequences of acute infection are not yet fully understood. Dermatological manifestations of COVID-19, including urticarial vasculitis, which is poorly responsive to standard therapy, are increasingly reported.</p> <p>Urticarial vasculitis is a rare dermatological manifestation of COVID-19, characterized by long-lasting welts with angioedema or without it, and histopathological features of leukocytoclastic vasculitis. Leukocytoclastic vasculitis, in turn, is a common form of small vessel vasculitis, with an inflammatory infiltrate consisting of neutrophils, fibrinoid necrosis, and nuclear debris fragmentation (leukocytoclasis). Proper nosology and classification of urticarial vasculitis based on clinical presentation and histological data are crucial.</p> <p>We described a clinical case of a 54-year-old woman with urticarial vasculitis, who had no systemic diseases. The lack of response to treatment with antihistamines in combination with corticosteroids led to the initiation of colchicine as an alternative therapy. Colchicine suppresses granulocyte mitotic activity, inhibits the formation of leukotriene B4, and reduces leukocyte migration to the site of inflammation, preventing neutrophil degranulation. After treatment with colchicine at a dose of 0.5 mg twice a day for 2 months, remission and improvement of clinical symptoms were achieved.</p> <p>Post-COVID syndrome with dermatological manifestations is a common issue today. Skin biopsy serves as an important tool in the differential diagnosis of chronic urticaria and urticarial vasculitis after a COVID-19 infection. This highlights the importance of studying dermatological manifestations of COVID-19 for more effective diagnosis and treatment of this disease.</p></abstract><trans-abstract xml:lang="ru"><p>В настоящее время сохраняется проблема распространения COVID-19-инфекции. Возможные последствия острой инфекции не до конца ясны. Всё чаще сообщается о различных дерматологических проявлениях COVID-19, включая уртикарный васкулит, плохо поддающийся лечению стандартными схемами терапии.</p> <p>Уртикарный васкулит ― редкое дерматологическое проявление COVID-19. Это состояние проявляется возникновением долговременных волдырей с ангионевротическим отёком или без него, характеризуется гистопатологическими признаками лейкоцитокластического васкулита. Лейкоцитокластический васкулит, в свою очередь, является распространённой формой васкулита мелких сосудов с воспалительным инфильтратом, который состоит из нейтрофилов, фибриноидного некроза, и распадом ядер на фрагменты (лейкоцитоклазия). Решающим значением является согласование правильной нозологии и классификации уртикарного васкулита на основе клинической картины и данных гистологии.</p> <p>Представляем описание клинического случая 54-летней женщины с уртикарным васкулитом, у которой не было системных заболеваний в анамнезе. Отсутствие эффекта от проводимой терапии антигистаминными препаратами в комбинации с глюкокортикоидами послужило основанием к назначению альтернативного препарата ― колхицина, который подавляет митотическую активность гранулоцитов, угнетает образование лейкотриена B4, а также снижает миграцию лейкоцитов в очаг воспаления, предотвращая дегрануляцию нейтрофилов. После лечения колхицином в дозе 0,5 мг 2 раза в день в течение 2 месяцев удалось добиться ремиссии и улучшения клинических симптомов.</p> <p>Постковидный синдром с дерматологическими проявлениями представляет на сегодняшний день распространённую проблему. Биопсия кожи служит важным инструментом дифференциальной диагностики хронической крапивницы и уртикарного васкулита после перенесённого COVID-19, что подчёркивает важность изучения дерматологических проявлений для более эффективной диагностики и лечения данной инфекции.</p></trans-abstract><kwd-group xml:lang="en"><kwd>leukocytoclastic vasculitis</kwd><kwd>COVID-19</kwd><kwd>post-acute COVID-19 syndrome</kwd><kwd>case report</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лейкоцитокластический васкулит</kwd><kwd>COVID-19</kwd><kwd>постковидный синдром</kwd><kwd>клинический случай</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Krause K, Bonnekoh H, Jelden-Thurm J, et al. Differential diagnosis between urticarial vasculitis and chronic spontaneous urticaria: An international Delphi survey. 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