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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">Vestnik dermatologii i venerologii</journal-id><journal-title-group><journal-title xml:lang="en">Vestnik dermatologii i venerologii</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник дерматологии и венерологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0042-4609</issn><issn publication-format="electronic">2313-6294</issn><publisher><publisher-name xml:lang="en">Rossijskoe Obschestvo Dermatovenerologov i Kosmetologov</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1239</article-id><article-id pub-id-type="doi">10.25208/vdv1239</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>GUIDELINES FOR PRACTITIONERS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>В ПОМОЩЬ ПРАКТИЧЕСКОМУ ВРАЧУ</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">Pagetoid reticulosis</article-title><trans-title-group xml:lang="ru"><trans-title>Педжетоидный ретикулез</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2089-6022</contrib-id><name-alternatives><name xml:lang="en"><surname>Sergeeva</surname><given-names>Ekaterina Yu.</given-names></name><name xml:lang="ru"><surname>Сергеева</surname><given-names>Екатерина Юрьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>к.м.н.</p></bio><bio xml:lang="ru"><p>д.б.н., профессор</p></bio><email>e.ya.sergeeva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9196-7246</contrib-id><name-alternatives><name xml:lang="en"><surname>Khorzhevskii</surname><given-names>Vladimir A.</given-names></name><name xml:lang="ru"><surname>Хоржевский</surname><given-names>Владимир Алексеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>к.м.н.</p></bio><email>vladpatholog@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8142-4283</contrib-id><name-alternatives><name xml:lang="en"><surname>Ruksha</surname><given-names>Tatiana G.</given-names></name><name xml:lang="ru"><surname>Рукша</surname><given-names>Татьяна Геннадьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Med.), Professor</p></bio><bio xml:lang="ru"><p>д.м.н., профессор</p></bio><email>tatyana_ruksha@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Krasnoyarsk State Medical University</institution></aff><aff><institution xml:lang="ru">Красноярский государственный медицинский университет им. профессора В.Ф. Войно-Ясенецкого</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-12-24" publication-format="electronic"><day>24</day><month>12</month><year>2021</year></pub-date><volume>97</volume><issue>6</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>81</fpage><lpage>86</lpage><history><date date-type="received" iso-8601-date="2021-04-30"><day>30</day><month>04</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-07-07"><day>07</day><month>07</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Sergeeva E.Y., Khorzhevskii V.A., Ruksha T.G.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Сергеева Е.Ю., Хоржевский В.А., Рукша Т.Г.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Sergeeva E.Y., Khorzhevskii V.A., Ruksha T.G.</copyright-holder><copyright-holder xml:lang="ru">Сергеева Е.Ю., Хоржевский В.А., Рукша Т.Г.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://vestnikdv.ru/jour/article/view/1239">https://vestnikdv.ru/jour/article/view/1239</self-uri><abstract xml:lang="en"><p>Pagetoid reticulosis (PR) is a rare type of mycosis fungoides. Clinical symptoms of PR can mimic other skin diseases of papulosquamous, neoplastic, and infectious origin that hampers PR diagnostics. The main histopathologic feature of PR is dense intraepidermal infiltration by medium to large-size lymphocytes through the epidermis leading to pagetoid plaque formation. There are three common immunophenotypes of PR: CD4-positive T-helper phenotype (CD3<sup>+</sup>, CD4<sup>+</sup>, CD8<sup>–</sup>); T-cytotoxic/suppressor (CD3<sup>+</sup>, CD4<sup>–</sup>, CD8<sup>+</sup>); and double negative phenotype (CD3<sup>+</sup>, CD4<sup>–</sup>, CD8<sup>–</sup>). The clinical case of PR with rare immunophenotype (CD2<sup>+</sup>, CD3<sup>+</sup>, CD8<sup>+</sup> lymphoid infiltrate) is presented. The careful analysis of the symptoms, pathomorphological and immunohistochemical data is necessary for accurate PR diagnostics.</p></abstract><trans-abstract xml:lang="ru"><p>Педжетоидный ретикулез (ПР) — редкий вид грибовидного микоза. Диагностика ПР затруднена, так как клинические проявления ПР могут совпадать с симптомами целого ряда других заболеваний, к числу которых относятся заболевания папулосквамозного, неопластического и инфекционного характера. Главная гистопатологическая особенность ПР — выраженная интраэпидермальная инфильтрация лимфоцитами среднего и большого размеров, распространение инфильтрата на всю глубину эпидермиса и формирование педжетоидной бляшки. Выделяют три распространенных иммуноморфологических подтипа ПР: CD4-позитивный T-хелперный фенотип (CD3<sup>+</sup>, CD4<sup>+</sup>, CD8<sup>–</sup>); T-цитотоксический/супрессорный фенотип (CD3<sup>+</sup>, CD4<sup>–</sup>, CD8<sup>+</sup>); двойной негативный фенотип (CD3<sup>+</sup>, CD4<sup>–</sup>, CD8<sup>–</sup>). В представленной работе рассматривается клинический случай ПР с нестандартным иммунофенотипом, при котором в лимфоидном инфильтрате преобладают CD2-, CD3-, CD8-позитивные Т-клетки. Тщательный анализ симптомов, патоморфологических, иммуногистохимических данных позволяет поставить точный диагноз ПР.</p></trans-abstract><kwd-group xml:lang="en"><kwd>mycosis fungoides</kwd><kwd>pagetoid reticulosis</kwd><kwd>lymphoma of the skin</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>грибовидный микоз</kwd><kwd>педжетоидный ретикулез</kwd><kwd>лимфома кожи</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Cerroni L, Hodak E, Kempf W, Pincus LB, Smoller BR, Willemze R. Variants of mycosis fungoides. In: Elder DE, Massi D, Scolyer RA, Willemze R, editors. WHO classification of skin tumours. Lyon; 2018. P. 231–233.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Torre-Castro J, Carrasco Santos L, Rodríguez-Pinilla SM, Requena L. Pagetoid reticulosis in a 13-year old female. A unique immunohistochemical profile. 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