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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">Cancer Urology</journal-id><journal-title-group><journal-title xml:lang="en">Cancer Urology</journal-title><trans-title-group xml:lang="ru"><trans-title>Онкоурология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1726-9776</issn><issn publication-format="electronic">1996-1812</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">419</article-id><article-id pub-id-type="doi">10.17650/1726-9776-2015-1-64-67</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CLINICAL CASE</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЙ СЛУЧАЙ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Large-sized kidney tumor mimicking an extraorgan retroperitoneal tumor</article-title><trans-title-group xml:lang="ru"><trans-title>Опухоль почки крупных размеров, имитирующая внеорганную опухоль забрюшинного пространства: клинический случай</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Reva</surname><given-names>I. A.</given-names></name><name xml:lang="ru"><surname>Рева</surname><given-names>И. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>rewa-igor@rambler.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bormotin</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Бормотин</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dyakov</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Дьяков</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bernikov</surname><given-names>A. N.</given-names></name><name xml:lang="ru"><surname>Берников</surname><given-names>А. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kovylina</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Ковылина</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Prilepskaya</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Прилепская</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pushkar</surname><given-names>D. Yu.</given-names></name><name xml:lang="ru"><surname>Пушкарь</surname><given-names>Д. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Department of Urology, A.I. Evdokimov Moscow State University of Medicine and Dentistry</institution></aff><aff><institution xml:lang="ru">Кафедра урологии Московского государственного медико-стоматологического университета им. А.И. Евдокимова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">21, Vuchetich St., Moscow 127 206, Russia</institution></aff><aff><institution xml:lang="ru">Россия, 127 206 Москва, ул. Вучетича, 21</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2015-03-30" publication-format="electronic"><day>30</day><month>03</month><year>2015</year></pub-date><volume>11</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>64</fpage><lpage>67</lpage><history><date date-type="received" iso-8601-date="2015-03-30"><day>30</day><month>03</month><year>2015</year></date><date date-type="accepted" iso-8601-date="2015-03-30"><day>30</day><month>03</month><year>2015</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://oncourology.abvpress.ru/oncur/article/view/419">https://oncourology.abvpress.ru/oncur/article/view/419</self-uri><abstract xml:lang="en"><p/><p/><p/><p>The retroperitoneal space may be a site for a broad spectrum of both rare benign and malignant tumors that are in turn a focus of primary or metastatic involvement. Sarcomas, lymphomas, and different epithelial tumors (of the kidney, adrenal, and pancreas) constitute the bulk of retroperitoneal tumors. Detection of a large-sized tumor located at one of the renal poles may raise the question of whether this mass is a kidney tumor or an extraorgan retroperitoneal tumor adjacent to or growing into the kidney. In view of significant differences in treatment procedures for various retroperitoneal tumors, when the origin of the mass is unknown, there is a need for an individual approach to defining the optimal therapeutic and diagnostic tactics, by attracting specialists in allied fields. </p></abstract><trans-abstract xml:lang="ru"><p><italic>Забрюшинное пространство может являться местом локализации широкого спектра как редких доброкачественных, так и злокачественных новообразований, являющихся, в свою очередь, очагом первичного или метастатического поражения. Большую часть опухолей забрюшинного пространства составляют саркомы, лимфомы и различные опухоли эпителиального происхождения (почки, надпочечника, поджелудочной железы). При выявлении крупной опухоли, расположенной у одного из полюсов почки, может встать вопрос о том, является ли данное образование опухолью почки или же внеорганной опухолью забрюшинного пространства, прилегающей к почке или прорастающей в нее. Ввиду значительных различий в методиках лечения разных опухолей забрюшинного пространства в случае неясного генеза образования для определения оптимальной лечебно-диагностической тактики необходим индивидуализированный подход с привлечением специалистов смежных специальностей.</italic></p></trans-abstract><kwd-group xml:lang="en"><kwd>renal cell carcinoma</kwd><kwd>extraorgan retroperitoneal tumor</kwd><kwd>liposarcoma</kwd><kwd>leiomyosarcoma</kwd><kwd>Hodgkin lymphoma</kwd><kwd>non-Hodgkin lymphoma</kwd><kwd>Burkitt lymphoma</kwd><kwd>differential diagnosis</kwd><kwd>multislice spiral computed tomography</kwd><kwd>fine-needle biopsy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>почечно-клеточный рак</kwd><kwd>внеорганная опухоль забрюшинного пространства</kwd><kwd>липосаркома</kwd><kwd>лейомиосаркома</kwd><kwd>лимфома Ходжкина</kwd><kwd>неходжкинская лимфома</kwd><kwd>лимфома Беркитта</kwd><kwd>дифференциальная диагностика</kwd><kwd>мультиспиральная компьютерная томография</kwd><kwd>тонкоигольная биопсия</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">1. 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