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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">uzspbgmu</journal-id><journal-title-group><journal-title xml:lang="ru">Учёные записки Первого Санкт-Петербургского государственного медицинского университета имени академика И. П. Павлова</journal-title><trans-title-group xml:lang="en"><trans-title>The Scientific Notes of the Pavlov University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1607-4181</issn><issn pub-type="epub">2541-8807</issn><publisher><publisher-name>Academician I.P. Pavlov First St. Petersburg State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24884/1607-4181-2025-32-2-113-118</article-id><article-id custom-type="elpub" pub-id-type="custom">uzspbgmu-1150</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>НАБЛЮДЕНИЯ ИЗ ПРАКТИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>OBSERVATION FROM PRACTICE</subject></subj-group></article-categories><title-group><article-title>Сложности морфологической диагностики врожденных меланоцитарных невусов</article-title><trans-title-group xml:lang="en"><trans-title>Difficulties of morphologic diagnosis of congenital melanocytic nevi</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4368-7810</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузнецова</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuznetsova</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кузнецова Ирина Анатольевна, кандидат медицинских наук, доцент кафедры патологической анатомии с патологоанатомическим отделением</p><p>197022, Санкт-Петербург, ул. Льва Толстого, д. 6-8 </p></bio><bio xml:lang="en"><p>Kuznetsova Irina A., Cand. Sci. (Med.), Associate Professor of the Department of Pathological Anatomy with Pathology Unit</p><p>6-8, L’va Tolstogo str., Saint Petersburg, 197022 </p></bio><email xlink:type="simple">iak1970@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-1846-5323</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яременко</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Yaremenko</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Яременко София Андреевна, студентка 5 курса лечебного факультета</p><p>197022, Санкт-Петербург, ул. Льва Толстого, д. 6-8 </p></bio><bio xml:lang="en"><p>Yaremenko Sofiia A., 5th year Student, Faculty of Medicine </p><p>6-8, L’va Tolstogo str., Saint Petersburg, 197022 </p></bio><email xlink:type="simple">yaremenko.sonya1710@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-4346-3943</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калинина</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalinina</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Калинина Алла Владимировна, студентка 5 курса стоматологического факультета</p><p>197022, Санкт-Петербург, ул. Льва Толстого, д. 6-8 </p></bio><bio xml:lang="en"><p>Kalinina Alla V., 5th year Student, Faculty of Dentistry </p><p>6-8, L’va Tolstogo str., Saint Petersburg, 197022 </p></bio><email xlink:type="simple">allochka.kalinina@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Первый Санкт-Петербургский государственный медицинский университет имени академика И. П. Павлова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pavlov University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>16</day><month>09</month><year>2025</year></pub-date><volume>32</volume><issue>2</issue><fpage>113</fpage><lpage>118</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кузнецова И.А., Яременко С.А., Калинина А.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кузнецова И.А., Яременко С.А., Калинина А.В.</copyright-holder><copyright-holder xml:lang="en">Kuznetsova I.A., Yaremenko S.A., Kalinina A.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://www.sci-notes.ru/jour/article/view/1150">https://www.sci-notes.ru/jour/article/view/1150</self-uri><abstract><p>Морфологическая диагностика меланоцитарных новообразований может вызвать значительные трудности. Абсолютных критериев, позволяющих определить потенциал злокачественности в спорных случаях, не существует. Представлено клинико-морфологическое наблюдение внутридермального невуса с гистологическими признаками врожденного. Выявлены особенности врожденного невуса – вовлечение эпителия придатков кожи, рост вокруг придатков и сосудов, инвагинация невоидных клеток в просвет лимфатических сосудов. При дифференциальной диагностике меланоцитарных новообразований кожи морфологу необходимо оценить не только наличие/отсутствие признаков атипизма и полиморфизма невомеланоцитов, но и признаки, характерные для врожденных невусов – рост вокруг придатков кожи с возможным вовлечением эпителия, а также скопления невомеланоцитов вокруг сосудов с возможным наличием невомеланоцитов в просвете лимфатических сосудов. Экспрессия НМВ-45 и CyclinD1 в немногочисленных поверхностных меланоцитах, низкая пролиферативная активность (по Ki67) наряду с гистологическими особенностями позволяют диагностировать меланоцитарный невус с признаками врожденного.</p></abstract><trans-abstract xml:lang="en"><p>Morphologic diagnostics of melanocytic neoplasms can cause considerable difficulties. There are no absolute criteria to determine the malignancy potential in controversial cases. A clinical and morphologic observation of an intradermal nevus with histologic features of congenital nevus is presented. The features of congenital nevus – involvement of epithelium of skin appendages, growth around appendages and vessels, invagination of nevoid cells in the lumen of lymphatic vessels – are revealed. In differential diagnosis of melanocytic neoplasms of the skin, a morphologist should evaluate not only the presence/absence of signs of atypism and polymorphism of nevomelanocytes, but also signs characteristic of congenital nevi – growth around skin appendages with possible involvement of epithelium, as well as accumulations of nevomelanocytes around vessels with possible presence of nevomelanocytes in the lumen of lymphatic vessels. Expression of HMB-45 and CyclinD1 in few superficial melanocytes, low proliferative activity (as measured by Ki67) along with histologic features allow diagnosing melanocytic nevus with congenital features.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>врожденный меланоцитарный невус</kwd><kwd>морфология</kwd><kwd>HMB-45</kwd><kwd>Ki-67</kwd><kwd>CyclinD1</kwd></kwd-group><kwd-group xml:lang="en"><kwd>congenital melanocytic nevus</kwd><kwd>morphology</kwd><kwd>HMB-45</kwd><kwd>Ki-67</kwd><kwd>CyclinD1</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">Collie C. J., Ho J. D. WHO classification // PathologyOutlines.com website. URL: https://www.pathologyoutlines.com/topic/skintumormelanocyticWHO.html (accessed 19.05.2025).</mixed-citation><mixed-citation xml:lang="en">Collie C. J., Ho J. D. WHO classification // PathologyOutlines.com website. 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