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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">ssmu</journal-id><journal-title-group><journal-title xml:lang="ru">Бюллетень сибирской медицины</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Siberian Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-0363</issn><issn pub-type="epub">1819-3684</issn><publisher><publisher-name>Siberian State Medical University, the Ministry of Healthcare of the Russian Federation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20538/1682-0363-2025-3-179-186</article-id><article-id custom-type="elpub" pub-id-type="custom">ssmu-6176</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>СЛУЧАЙ ИЗ КЛИНИЧЕСКОЙ ПРАКТИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL CASES</subject></subj-group></article-categories><title-group><article-title>Диагностические сложности первичного диффузного меланоцитоза ЦНС: клиническое наблюдение</article-title><trans-title-group xml:lang="en"><trans-title>Diagnostic difficulties of primary diffuse leptomeningeal melanocytosis of the central nervous system: clinical case</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1195-4008</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вторушин</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vtorushin</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вторушин Сергей Владимирович – д-р мед. наук, профессор, зам. директора по научной работе и трансляционной медицине, руководитель отделения общей и молекулярной патологии, НИИ онкологии, Томский НИМЦ; профессор кафедры патологической анатомии, СибГМУ.</p><p>634050, Томск, Московский тракт, 2; 634009, Томск, пер. Кооперативный, 5</p></bio><bio xml:lang="en"><p>2 Moskovsky trakt, 634050 Tomsk; 5 Kooperativny St., 634009 Tomsk</p></bio><email xlink:type="simple">wtorushin@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/0000-0002-9780-0770</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Васильченко</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vasilchenko</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Васильченко Дмитрий Владимирович – канд. мед. наук, вед. науч. сотрудник, Центральная научно-исследовательская лаборатория, СибГМУ; врач-патологоанатом, патологоанатомическое отделение, СибГМУ.</p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2 Moskovsky trakt, 634050 Tomsk</p></bio><email xlink:type="simple">vasilchenkodmitry1991@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0589-0260</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тонких</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Tonkikh</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тонких Ольга Сергеевна – канд. мед. наук, ассистент, кафедра педиатрии с курсом эндокринологии, СибГМУ; зав. отделением томографических методов исследования, клиники СибГМУ.</p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2 Moskovsky trakt, 634050 Tomsk</p></bio><email xlink:type="simple">tonkih.os@ssmu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-4085-3612</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вторушин</surname><given-names>К. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Vtorushin</surname><given-names>K. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вторушин Константин Сергеевич – студент, лечебный факультет, СибГМУ.</p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2 Moskovsky trakt, 634050 Tomsk</p></bio><email xlink:type="simple">konstantinvtorushin.doctor@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дегтяренко</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Degtyarenko</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дегтяренко Наталья Викторовна – зав. неврологической клиникой, врач-невролог, клиники СибГМУ.</p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2 Moskovsky trakt, 634050 Tomsk</p></bio><email xlink:type="simple">degtyarenko.nv@ssmu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1909-1681</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Крахмаль</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Krakhmal</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Крахмаль Надежда Валерьевна – канд. мед. наук, доцент, ст. науч. сотрудник, отделение общей и молекулярной патологии, НИИ онкологии, Томский НИМЦ; доцент кафедры патологической анатомии, СибГМУ; врач-патологоанатом, патологоанатомическое отделение, клиники СибГМУ.</p><p>634050, Томск, Московский тракт, 2; 634009, Томск, пер. Кооперативный, 5</p></bio><bio xml:lang="en"><p>2 Moskovsky trakt, 634050 Tomsk; 5 Kooperativny St., 634009 Tomsk</p></bio><email xlink:type="simple">krakhmal@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский государственный медицинский университет (СибГМУ); Научно-исследовательский институт онкологии (НИИ онкологии) Томского национального исследовательского медицинского центра (НИМЦ) Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian State Medical University (SibSMU); Cancer Research Institute, Tomsk National Research Medical Center (NRMC), Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Сибирский государственный медицинский университет (СибГМУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian State Medical University (SibSMU)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>15</day><month>10</month><year>2025</year></pub-date><volume>24</volume><issue>3</issue><fpage>179</fpage><lpage>186</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Вторушин С.В., Васильченко Д.В., Тонких О.С., Вторушин К.С., Дегтяренко Н.В., Крахмаль Н.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Вторушин С.В., Васильченко Д.В., Тонких О.С., Вторушин К.С., Дегтяренко Н.В., Крахмаль Н.В.</copyright-holder><copyright-holder xml:lang="en">Vtorushin S.V., Vasilchenko D.V., Tonkikh O.S., Vtorushin K.S., Degtyarenko N.V., Krakhmal N.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://bulletin.ssmu.ru/jour/article/view/6176">https://bulletin.ssmu.ru/jour/article/view/6176</self-uri><abstract><p>Первичный диффузный лептоменингеальный меланоцитоз (ПДЛМ) – редкое опухолевое поражение центральной нервной системы, характеризующееся диффузной инфильтрацией мягких мозговых оболочек меланоцитарными клетками без явной инвазии в паренхиму головного мозга. Диагностика заболевания представляет сложность в связи с неспецифичностью клинической картины и отсутствием четких нейровизуализационных критериев, что требует проведения морфологического и иммуногистохимического исследований для окончательной верификации диагноза.</p><p>В статье представлен клинический случай пациента с прогрессирующими неврологическими нарушениями, диагностическими сложностями и постмортальной верификацией ПДЛМ. Описаны ключевые дифференциально-диагностические аспекты, особенности морфологического строения опухоли и ее иммуногистохимический профиль. Также представлены данные нейровизуализационных исследований, демонстрирующие характерные изменения, сопровождающие ПДЛМ. Описанный случай демонстрирует необходимость междисциплинарного подхода при ведении пациентов с хроническими менингеальными поражениями неустановленной этиологии и подчеркивает значимость дальнейших исследований в области молекулярной диагностики и потенциальных терапевтических стратегий.</p></abstract><trans-abstract xml:lang="en"><p>Primary diffuse leptomeningeal melanocytosis (PDLM) is a rare neoplastic lesion of the central nervous system, characterized by diffuse infiltration of the leptomeninges by melanocytes without apparent invasion into the brain parenchyma. Diagnosing the disease is challenging due to its nonspecific clinical presentation and the lack of clear neuroimaging criteria, necessitating morphological and immunohistochemical studies for definitive verification.</p><p>This article presents a clinical case of a patient with progressive neurological impairments, diagnostic challenges, and postmortem verification of PDLM. The key differential diagnostic aspects, the morphological structure of the tumor, and its immunohistochemical profile are described. Additionally, neuroimaging data are provided, demonstrating characteristic changes associated with PDLM. The presented clinical case highlights the necessity of a multidisciplinary approach to managing patients with chronic meningeal lesions of unknown etiology and underscores the importance of further research in molecular diagnostics and potential treatment strategies.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>первичный диффузный менингеальный меланоцитоз</kwd><kwd>нейровизуализация</kwd><kwd>иммуногистохимия</kwd><kwd>патоморфология</kwd></kwd-group><kwd-group xml:lang="en"><kwd>primary diffuse meningeal melanocytosis</kwd><kwd>neuroimaging</kwd><kwd>immunohistochemistry</kwd><kwd>pathology</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы заявляют об отсутствии финансирования при проведении исследования</funding-statement><funding-statement xml:lang="en">The authors state that they received no funding for the study</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">Pellerino A., Verdijk R.M., Nichelli L., Andratschke N.H., Idbaih A., Goldbrunner R. 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