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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">Journal of Clinical Practice</journal-id><journal-title-group><journal-title xml:lang="en">Journal of Clinical Practice</journal-title><trans-title-group xml:lang="ru"><trans-title>Клиническая практика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2220-3095</issn><issn publication-format="electronic">2618-8627</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">704885</article-id><article-id pub-id-type="doi">10.17816/clinpract704885</article-id><article-id pub-id-type="edn">HEQUZJ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original Study Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные исследования</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">Computed tomography as a method for diagnosing true vascular invasion in pancreatic cancer</article-title><trans-title-group xml:lang="ru"><trans-title>Диагностическая ценность компьютерной томографии в оценке истинной венозной инвазии рака поджелудочной железы после неоадъювантной полихимиотерапии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4148-2953</contrib-id><contrib-id contrib-id-type="spin">6815-9959</contrib-id><name-alternatives><name xml:lang="en"><surname>Kuchin</surname><given-names>Denis M.</given-names></name><name xml:lang="ru"><surname>Кучин</surname><given-names>Денис Михайлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>pomc.kuchin@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6824-6379</contrib-id><contrib-id contrib-id-type="spin">2806-8721</contrib-id><name-alternatives><name xml:lang="en"><surname>Yarikhovich</surname><given-names>Grigory A.</given-names></name><name xml:lang="ru"><surname>Ярихович</surname><given-names>Григорий Андреевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>yandr24@gmail.com</email><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/0000-0003-3897-8306</contrib-id><contrib-id contrib-id-type="spin">5619-1151</contrib-id><name-alternatives><name xml:lang="en"><surname>Smirnov</surname><given-names>Alexander V.</given-names></name><name xml:lang="ru"><surname>Смирнов</surname><given-names>Александр Вячеславович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Assistant Professor</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доцент</p></bio><email>smirnov.av@fnkc-fmba.ru</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7959-1813</contrib-id><contrib-id contrib-id-type="spin">9540-8042</contrib-id><name-alternatives><name xml:lang="en"><surname>Kolesnik</surname><given-names>Yan I.</given-names></name><name xml:lang="ru"><surname>Колесник</surname><given-names>Ян Игоревич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>kolesnik-y-i@yandex.ru</email><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/0000-0002-5769-0378</contrib-id><contrib-id contrib-id-type="spin">6477-0291</contrib-id><name-alternatives><name xml:lang="en"><surname>Zagainov</surname><given-names>Vladimir E.</given-names></name><name xml:lang="ru"><surname>Загайнов</surname><given-names>Владимир Евгеньевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Assistant Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, доцент</p></bio><email>zagainov@xmail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Research Institute of Clinical Oncology «Nizhny Novgorod Regional Clinical Oncological Dispensary»</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт клинической онкологии «Нижегородский областной клинический онкологический диспансер»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Privolzhsky Research Medical University</institution></aff><aff><institution xml:lang="ru">Приволжский исследовательский медицинский университет</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Nizhny Novgorod Regional Clinical Hospital named after N.A. Semashko</institution></aff><aff><institution xml:lang="ru">Нижегородская областная клиническая больница имени Н.А. Семашко</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Federal Research and Clinical Center of Specialized Medical Care and Medical Technologies</institution></aff><aff><institution xml:lang="ru">Федеральный научно-клинический центр специализированных видов медицинской помощи и медицинских технологий</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2026-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2026</year></pub-date><pub-date date-type="pub" iso-8601-date="2026-08-06" publication-format="electronic"><day>06</day><month>08</month><year>2026</year></pub-date><volume>17</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>35</fpage><lpage>43</lpage><history><date date-type="received" iso-8601-date="2026-03-24"><day>24</day><month>03</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-04-06"><day>06</day><month>04</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Эко-Вектор</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</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-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://clinpractice.ru/clinpractice/article/view/704885">https://clinpractice.ru/clinpractice/article/view/704885</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND:</bold> Evaluation of true venous invasion in pancreatic cancer using preoperative computed tomography data plays a key role in determining tumor resectability, choosing treatment strategies, and planning the extent of surgical intervention. With the widespread use of neoadjuvant chemotherapy, traditional computed tomography criteria for venous involvement developed for chemotherapy-naive patients may lose diagnostic reliability due to significant post-therapy fibrotic changes. <bold>AIM:</bold> To analyze the diagnostic capabilities of preoperative computed tomography in detecting true venous invasion of the portal system in patients with pancreatic cancer after neoadjuvant chemotherapy. <bold>METHODS:</bold> A retrospective analysis of 61 patients with pancreatic head cancer who underwent radical surgery was conducted. Patients were divided into two groups: 37 patients without preoperative drug therapy and 24 patients who received neoadjuvant polychemotherapy. Preoperative computed tomography data were used to assess the angle of circumferential tumor contact with the portal veins, the length of contact, and the nature of the vascular wall contour (the presence or absence of erosion). Histological examination of resected venous wall sections served as the reference method. <bold>RESULTS:</bold> Irregularity of the venous wall contour or tumor coverage of more than 180° of the main venous vessels were associated with a high rate of true venous invasion. However, the absence of erosion and contact of less than 180° did not exclude tumor growth into the venous wall. A significant proportion (24.3%) of patients classified as resectable ultimately had morphologically confirmed invasion. In patients after neoadjuvant chemotherapy, none of the pre- or post-treatment computed tomography findings reliably predicted the presence or absence of true venous invasion. Increasing the number of courses of neoadjuvant chemotherapy to more than five was associated with a significant reduction in the incidence of true venous invasion. <bold>CONCLUSION:</bold><bold> </bold>After neoadjuvant chemotherapy, the diagnostic value of preoperative computed tomography in assessing true venous invasion in pancreatic cancer is significantly reduced. Even in the absence of vein contour irregularities and limited tumor-vessel contact, a clinically significant probability of tumor growth into the venous wall remains. On the other hand, in the presence of extensive contact and vascular wall irregularities, true vascular invasion may be absent. Computed tomography findings in the post-neoadjuvant group cannot be considered a reliable basis for refusing a patient surgical treatment.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование.</bold> Оценка истинной венозной инвазии при раке поджелудочной железы по данным предоперационной компьютерной томографии играет ключевую роль в определении резектабельности опухоли, выборе тактики лечения и планировании объёма хирургического вмешательства. В условиях широкого внедрения неоадъювантной полихимиотерапии традиционные компьютерно-томографические критерии венозного вовлечения, разработанные для химионаивных пациентов, могут утрачивать диагностическую надёжность вследствие выраженных посттерапевтических фиброзных изменений. <bold>Цель исследования</bold> — проанализировать диагностические возможности предоперационной компьютерной томографии в выявлении истинной инвазии вен портальной системы у пациентов с раком поджелудочной железы после неоадъювантной полихимиотерапии. <bold>Методы.</bold> Проведён ретроспективный анализ данных 61 больного раком головки поджелудочной железы после радикального хирургического лечения. Пациенты разделены на 2 группы: 37 больных без предоперационного лекарственного лечения и 24 пациента, получившие неоадъювантную полихимиотерапию. Угол циркулярного контакта опухоли с венами портальной системы, протяжённость контакта и характер контура сосудистой стенки (наличие или отсутствие узурации) оценивали по данным предоперационной компьютерной томографии. Референтным методом являлось гистологическое исследование резецированных участков венозной стенки. <bold>Результаты.</bold> Неровность контура венозной стенки или охват магистрального венозного сосуда опухолью более 180° ассоциировались с высокой частотой истинной венозной инвазии, в то же время отсутствие узурации и контакт менее 180° не исключали роста опухоли в венозную стенку. Значительная часть (24,3%) пациентов, классифицированных как резектабельные, в итоге имели морфологически подтверждённую инвазию. У пациентов после неоадъювантной полихимиотерапии ни один из признаков компьютерной томографии до лечения и после него достоверно не предсказывал наличие или отсутствие истинной венозной инвазии. Увеличение числа курсов неоадъювантной полихимиотерапии более 5 сопровождалось значимым снижением частоты истинной венозной инвазии. <bold>Заключение.</bold> После неоадъювантной полихимиотерапии диагностическая ценность предоперационной компьютерной томографии в оценке истинной венозной инвазии рака поджелудочной железы существенно снижается. Даже при отсутствии неровности контура вены и ограниченном объёме контакта опухоли с сосудом сохраняется клинически значимая вероятность опухолевого роста в венозную стенку. С другой стороны, при наличии протяжённого контакта и неровности сосудистой стенки возможно отсутствие истинной сосудистой инвазии. Данные компьютерной томографии у пациентов после неоадъювантной полихимиотерапии не могут рассматриваться надёжным основанием для отказа пациенту в хирургическом лечении.</p></trans-abstract><kwd-group xml:lang="en"><kwd>pancreatic cancer</kwd><kwd>computed tomography</kwd><kwd>venous invasion</kwd><kwd>neoadjuvant chemotherapy</kwd><kwd>venous resection</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рак поджелудочной железы</kwd><kwd>компьютерная томография</kwd><kwd>венозная инвазия</kwd><kwd>неоадъювантная химиотерапия</kwd><kwd>венозная резекция</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Buchs NC, Chilcott M, Poletti PA, et al. Vascular invasion in pancreatic cancer: imaging modalities, preoperative diagnosis and surgical management. 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