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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Oncohematology</journal-id><journal-title-group><journal-title xml:lang="en">Oncohematology</journal-title><trans-title-group xml:lang="ru"><trans-title>Онкогематология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1818-8346</issn><issn publication-format="electronic">2413-4023</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">432</article-id><article-id pub-id-type="doi">10.17650/1818-8346-2020-15-3-63-66</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>DIAGNOSIS AND TREATMENT OF HEMOBLASTOSES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ДИАГНОСТИКА И ЛЕЧЕНИЕ ГЕМОБЛАСТОЗОВ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Unspecified skin peripheral T-cell lymphoma: diagnostic difficulties</article-title><trans-title-group xml:lang="ru"><trans-title>Периферическая Т-клеточная лимфома кожи неуточненная: трудности диагностики</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2482-1754</contrib-id><name-alternatives><name xml:lang="en"><surname>Olisova</surname><given-names>O. Yu.</given-names></name><name xml:lang="ru"><surname>Олисова</surname><given-names>О. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>4, Build. 1 Bol’shaya Pirogovskaya St., Moscow 119991, Russia</italic></p></bio><bio xml:lang="ru"><p><italic>Россия, 119991 Москва, ул. Большая Пироговская, 4. стр. 1</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1088-2911</contrib-id><name-alternatives><name xml:lang="en"><surname>Vertieva</surname><given-names>E. Yu.</given-names></name><name xml:lang="ru"><surname>Вертиева</surname><given-names>Е. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>4, Build. 1 Bol’shaya Pirogovskaya St., Moscow 119991, Russia</italic></p></bio><bio xml:lang="ru"><p><italic>Россия, 119991 Москва, ул. Большая Пироговская, 4. стр. 1</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3907-2189</contrib-id><name-alternatives><name xml:lang="en"><surname>Amshinskaya</surname><given-names>D. R.</given-names></name><name xml:lang="ru"><surname>Амшинская</surname><given-names>Д. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>4, Build. 1 Bol’shaya Pirogovskaya St., Moscow 119991, Russia</italic></p></bio><bio xml:lang="ru"><p><bold>Джессика Рафаиловна Амшинская</bold></p><p><italic>Россия, 119991 Москва, ул. Большая Пироговская, 4. стр. 1</italic></p></bio><email>dr.jessika@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4767-3002</contrib-id><name-alternatives><name xml:lang="en"><surname>Lecaillon</surname><given-names>M. G.</given-names></name><name xml:lang="ru"><surname>Лекайон</surname><given-names>М. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>4, Build. 1 Bol’shaya Pirogovskaya St., Moscow 119991, Russia</italic></p></bio><bio xml:lang="ru"><p><italic>Россия, 119991 Москва, ул. Большая Пироговская, 4. стр. 1</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7968-9829</contrib-id><name-alternatives><name xml:lang="en"><surname>Grekova</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Грекова</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>4, Build. 1 Bol’shaya Pirogovskaya St., Moscow 119991, Russia</italic></p></bio><bio xml:lang="ru"><p><italic>Россия, 119991 Москва, ул. Большая Пироговская, 4. стр. 1</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Department Skin and Venereal Diseases named after V. A. Rakhmanov, Institute of Clinical Medicine, I. M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)</institution></aff><aff><institution xml:lang="ru">Кафедра кожных и венерических болезней им. В. А. Рахманова Института клинической медицины ФГАОУ ВО Первый Московский государственный медицинский университет им. И. М. Сеченова Минздрава России (Сеченовский университет)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-10-16" publication-format="electronic"><day>16</day><month>10</month><year>2020</year></pub-date><volume>15</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>63</fpage><lpage>66</lpage><history><date date-type="received" iso-8601-date="2020-10-15"><day>15</day><month>10</month><year>2020</year></date><date date-type="accepted" iso-8601-date="2020-10-15"><day>15</day><month>10</month><year>2020</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://oncohematology.abvpress.ru/ongm/article/view/432">https://oncohematology.abvpress.ru/ongm/article/view/432</self-uri><abstract xml:lang="en"><p>Peripheral T-cell lymphoma, not otherwise specified (PTCL-NOS) have an aggressive, life-threatening course. 5‑year survival rate is less than 20 %, which may be due to not timely diagnosis. PTCL-NOS can histologically and immunophenotypically mimic other T-cell lymphomas of the skin, including mycosis fungoides. In this connection, the correct diagnosis is most often established in the late stages of the disease. We present a clinical case of PTCL-NOS misdiagnosed as mycosis fungoides.</p></abstract><trans-abstract xml:lang="ru"><p>Периферические Т-клеточные лимфомы кожи неуточненные (ПТКЛн) имеют агрессивное, угрожающее жизни течение. Пяти- летняя выживаемость составляет менее 20 %, что может быть связано с несвоевременной диагностикой. ПТКЛн могут гистологически и иммунофенотипически имитировать другие Т-клеточные лимфомы кожи, в том числе грибовидный микоз, в связи с чем правильный диагноз устанавливается чаще всего на поздних стадиях заболевания. Представляем клинический случай ПТКЛн, ошибочно диагностируемой как грибовидный микоз.</p></trans-abstract><kwd-group xml:lang="en"><kwd>lymphoma</kwd><kwd>T-cell lymphoma</kwd><kwd>cutaneous peripheral T-cell lymphomas</kwd><kwd>not otherwise specified</kwd><kwd>mycosis fungoides</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лимфома</kwd><kwd>Т-клеточная лимфома</kwd><kwd>периферическая Т-клеточная лимфома кожи неуточненная</kwd><kwd>грибовидный микоз</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">Doronin V.A. T-cell lymphomas: therapeutic possibilities for a limited choice. Klinicheskaya onkogematologiya. Fundamental’nye issledovaniya i klinicheskaya praktika = Clinical Hematology Oncology. Basic Research and Clinical Practice 2013;6(2):127–38. (In Russ.).</mixed-citation><mixed-citation xml:lang="ru">Доронин В.А. 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