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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">797</article-id><article-id pub-id-type="doi">10.17650/1818-8346-2023-18-1-39-47</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>RARE AND COMPLEX CLINICAL SITUATIONS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>РЕДКИЕ И СЛОЖНЫЕ КЛИНИЧЕСКИЕ СИТУАЦИИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Clinical case of a 44-year-old patient with newly diagnosed peripheral T-cell lymphoma unspecified (Lennert’s lymphoma) and Loeffler’s endocarditis</article-title><trans-title-group xml:lang="ru"><trans-title>Клиническое наблюдение пациентки 44 лет с впервые выявленной периферической Т-клеточной лимфомой неспецифицированной (лимфомой Леннерта) и эндокардитом Леффлера</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8443-8816</contrib-id><name-alternatives><name xml:lang="en"><surname>Ryabukhina</surname><given-names>Yu. E.</given-names></name><name xml:lang="ru"><surname>Рябухина</surname><given-names>Ю. Е.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Yuliya Evgen’evna Ryabukhina</bold></p><p><italic>143081, Moscow region, Lapino, 1<sup>st</sup> Uspenskoe Shosse, 111</italic></p></bio><bio xml:lang="ru"><p><bold> Юлия Евгеньевна Рябухина</bold></p><p><italic>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111</italic></p></bio><email>gemonk.yur@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6229-7300</contrib-id><name-alternatives><name xml:lang="en"><surname>Timofeeva</surname><given-names>O. L.</given-names></name><name xml:lang="ru"><surname>Тимофеева</surname><given-names>О. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>143081, Moscow region, Lapino, 1<sup>st</sup> Uspenskoe Shosse, 111</italic></p></bio><bio xml:lang="ru"><p><italic>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6395-5790</contrib-id><name-alternatives><name xml:lang="en"><surname>Akhobekov</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Ахобеков</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>143081, Moscow region, Lapino, 1<sup>st</sup> Uspenskoe Shosse, 111</italic></p></bio><bio xml:lang="ru"><p><italic>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1564-424X</contrib-id><name-alternatives><name xml:lang="en"><surname>Zeynalova</surname><given-names>P. A.</given-names></name><name xml:lang="ru"><surname>Зейналова</surname><given-names>П. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>143081, Moscow region, Lapino, 1<sup>st</sup> Uspenskoe Shosse, 111119991, Moscow, Trubetskaya St., 8, Build. 2</italic></p></bio><bio xml:lang="ru"><p><italic>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111119991 Москва, ул. Трубецкая, 8, стр. 2</italic></p></bio><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2359-0547</contrib-id><name-alternatives><name xml:lang="en"><surname>Abbasbeyli</surname><given-names>F. M.</given-names></name><name xml:lang="ru"><surname>Аббасбейли</surname><given-names>Ф. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>143081, Moscow region, Lapino, 1<sup>st</sup> Uspenskoe Shosse, 111</italic></p></bio><bio xml:lang="ru"><p><italic>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5910-5892</contrib-id><name-alternatives><name xml:lang="en"><surname>Allakhverdieva</surname><given-names>G. F.</given-names></name><name xml:lang="ru"><surname>Аллахвердиева</surname><given-names>Г. Ф.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>143081, Moscow region, Lapino, 1<sup>st</sup> Uspenskoe Shosse, 111</italic></p></bio><bio xml:lang="ru"><p><italic>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zhukov</surname><given-names>A. G.</given-names></name><name xml:lang="ru"><surname>Жуков</surname><given-names>А. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>143081, Moscow region, Lapino, 1<sup>st</sup> Uspenskoe Shosse, 111</italic></p></bio><bio xml:lang="ru"><p><italic>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9447-3292</contrib-id><name-alternatives><name xml:lang="en"><surname>Fedotov</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Федотов</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>143081, Moscow region, Lapino, 1<sup>st</sup> Uspenskoe Shosse, 111121205, Moscow, Skolkovo Innovation Center, Bolshoy Bulvar, 42c1 office 0.049 first core</italic></p></bio><bio xml:lang="ru"><p><italic>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111121205 Москва, Инновационный центр Сколково, Большой бульвар, 42с1 оф. 0.049 первое ядро</italic></p></bio><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5298-8124</contrib-id><name-alternatives><name xml:lang="en"><surname>Shestakova</surname><given-names>L. A.</given-names></name><name xml:lang="ru"><surname>Шестакова</surname><given-names>Л. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>143081, Moscow region, Lapino, 1<sup>st</sup> Uspenskoe Shosse, 111</italic></p></bio><bio xml:lang="ru"><p><italic>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Clinical Hospital “Lapino” of the “Mother and Child” Group of companies</institution></aff><aff><institution xml:lang="ru">Клинический госпиталь «Лапино» группы компаний «Мать и дитя»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО Первый Московский государственный медицинский университет им. И.М. Сеченова Минздрава России (Сеченовский Университет)</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">UNIM LLC</institution></aff><aff><institution xml:lang="ru">ООО «ЮНИМ»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2023</year></pub-date><volume>18</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>39</fpage><lpage>47</lpage><history><date date-type="received" iso-8601-date="2023-03-14"><day>14</day><month>03</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-03-14"><day>14</day><month>03</month><year>2023</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/797">https://oncohematology.abvpress.ru/ongm/article/view/797</self-uri><abstract xml:lang="en"><p>Peripheral T-cell lymphoma unspecified (PTCLu) in most cases has an aggressive clinical course and is characterized by a high frequency of extranodal lesions. One of the manifestations of PTCLu, in particular Lennert’s lymphoma, is eosinophilia. Regardless of the development mechanism, eosinophilia can be accompanied by heart damage, leading to endomyocardial fibrosis, ventricular thrombosis and, in the final stage, to restrictive cardiomyopathies, which are manifestations of Loeffler’s endocarditis (LE). The presence of LE aggravates the course and prognosis of PTCLu, primarily limiting the possibilities of antitumor drug therapy. A multidisciplinary approach to managing a patient with PTCLu and concomitant LE makes it possible to diagnose and start both specific and cardiotropic therapy in a timely manner, ultimately improving the prognosis. A clinical case of a 44‑year-old patient with newly diagnosed PTCLu (Lennert’s lymphoma) and LE is presented.</p></abstract><trans-abstract xml:lang="ru"><p>Периферическая Т-клеточная лимфома неспецифицированная (ПТКЛн) в большинстве наблюдений имеет агрессивное клиническое течение и характеризуется высокой частотой экстранодального поражения. Одним из признаков ПТКЛн, в частности лимфомы Леннерта, является эозинофилия. Независимо от механизма развития эозинофилии могут протекать с поражением сердца, приводя к эндомиокардиальному фиброзу, тромбообразованию желудочков и в конечной стадии – к рестриктивной кардиомиопатии, являющихся признаками эндокардита Леффлера (ЭЛ). Наличие ЭЛ усугубляет течение и прогноз ПТКЛн, ограничивая в первую очередь возможности противоопухолевой лекарственной терапии. Благодаря применению мультидисциплинарного подхода к ведению пациента с ПТКЛн и сопутствующим ЭЛ возможно диагностировать и своевременно начать проведение как специфической, так и кардиотропной терапии, улучшив в конечном итоге прогноз.Представлено клиническое наблюдение пациентки 44 лет с впервые выявленной ПТКЛн (лимфомой Леннерта) и ЭЛ.</p></trans-abstract><kwd-group xml:lang="en"><kwd>peripheral T-cell lymphoma unspecified</kwd><kwd>Loeffler’s endocarditis</kwd><kwd>multidisciplinary approach</kwd><kwd>anticancer drug therapy</kwd><kwd>cardiotropic therapy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>периферическая Т-клеточная лимфома неспецифицированная</kwd><kwd>эндокардит Леффлера</kwd><kwd>мультидисциплинарный подход</kwd><kwd>лекарственная противоопухолевая терапия</kwd><kwd>кардиотропная терапия</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Swerdlow S.H., Campo E., Harris N.L. et al. 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