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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">Pharmateca</journal-id><journal-title-group><journal-title xml:lang="en">Pharmateca</journal-title><trans-title-group xml:lang="ru"><trans-title>Фарматека</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2073-4034</issn><issn publication-format="electronic">2414-9128</issn><publisher><publisher-name xml:lang="en">Bionika Media</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">312878</article-id><article-id pub-id-type="doi">10.18565/pharmateca.2020.11.59-62</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">Observation of primary duodenal cancer. Case report</article-title><trans-title-group xml:lang="ru"><trans-title>Наблюдение первичного рака двенадцатиперстной кишки. Случай из практики</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khakimov</surname><given-names>Gulnoz G.</given-names></name><name xml:lang="ru"><surname>Хакимов</surname><given-names>Г. А</given-names></name></name-alternatives><bio xml:lang="en"><p>Postgraduate Student at the Oncology Department of Medicinal Methods of Treatment (Chemotherapy) № 3</p></bio><bio xml:lang="ru"><p>аспирант онкологического отделения лекарственных методов лечения (химиотерапевтическое) № 3</p></bio><email>hgg_doc@mail.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>Dzhumaniyozov</surname><given-names>Kh. I</given-names></name><name xml:lang="ru"><surname>Джуманиезов</surname><given-names>Х. И</given-names></name></name-alternatives><bio xml:lang="en"><p>Pediatric Oncology</p></bio><bio xml:lang="ru"><p>кафедра онкологии, детской онкологии</p></bio><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khakimova</surname><given-names>G. G</given-names></name><name xml:lang="ru"><surname>Хакимова</surname><given-names>Г. Г</given-names></name></name-alternatives><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Tashkent Pediatric Medical Institute, Department of Oncology</institution></aff><aff><institution xml:lang="ru">Ташкентский педиатрический медицинский институт</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Tashkent City Branch of the Republican Specialized Scientific and Practical Center of Oncology and Radiology</institution></aff><aff><institution xml:lang="ru">Ташкентский городской филиал Республиканского специализированного научно-практического центра онкологии и радиологии</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">N.N. Blokhin National Medical Research Center of Oncology</institution></aff><aff><institution xml:lang="ru">Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-10-20" publication-format="electronic"><day>20</day><month>10</month><year>2020</year></pub-date><volume>27</volume><issue>11</issue><issue-title xml:lang="en">VOL 27, NO11 (2020)</issue-title><issue-title xml:lang="ru">ТОМ 27, №11 (2020)</issue-title><fpage>59</fpage><lpage>63</lpage><history><date date-type="received" iso-8601-date="2023-03-03"><day>03</day><month>03</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Bionika Media</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, ООО «Бионика Медиа»</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Bionika Media</copyright-holder><copyright-holder xml:lang="ru">ООО «Бионика Медиа»</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2073-4034/article/view/312878">https://journals.eco-vector.com/2073-4034/article/view/312878</self-uri><abstract xml:lang="en"><p>Background. Until now, there is no single concept in the complex treatment of malignant tumors of the duodenum due to the low incidence of morbidity. Description of the clinical case. The article describes the case of a 27-year-old female patient with a history of gastrointestinal bleeding of unknown etiology. A tumor with a complicated course in the form of profuse bleeding was not visualized during diagnostic procedures. It was associated with the feature of the histostructure, the origin of the tumor from the muscular structure of the duodenal wall and extraorganic growth without damage to the mucous membrane. Conclusion. The case described is a vivid example of the complexity of diagnosis of tumors of the hepatopancreatoduodenal zone, demonstrating a high percentage of diagnostic errors in the complicated course of the tumor process in the form of profuse bleeding.</p></abstract><trans-abstract xml:lang="ru"><p>Обоснование. До настоящего времени в связи с малой численностью заболеваемости не существует единой концепции в комплексном лечении злокачественных опухолей двенадцатиперстной кишки. Описание клинического случая. В статье описывается случай пациентки 27 лет с желудочно-кишечным кровотечением неясной этиологии в анамнезе. При выполнении диагностических процедур опухоль с осложненным течением в виде профузного кровотечения не визуализирована. Это обусловлено особенностью гистоструктуры, происхождением опухоли из мышечной структуры стенки двенадцатиперстной кишки и экстраорганным ростом без поражения слизистой оболочки. Заключение. Описываемый нами случай служит ярким примером сложности диагностики при опухолях гепатопанкреато-дуоденальной зоны, демонстрируя высокий процент диагностических погрешностей при осложненном течении опухолевого процесса в виде профузного кровотечения.</p></trans-abstract><kwd-group xml:lang="en"><kwd>duodenal cancer</kwd><kwd>gastropancreatoduodenal resection</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рак двенадцатиперстной кишки</kwd><kwd>гастропанкреатодуоденальная резекция</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Chiotasso P.J., Fazio VW. Prognostic factors of 28 leiomyosarcomas of the small intestine. Surg Gynecol Obstet. 1982;155:197e202.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>North J.H., Pack M.S. Malignant tumors of the small intestine: a review of 144 cases. Am Surg. 2000;66:46-51.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Martin R.G. 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