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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">Surgery and Oncology</journal-id><journal-title-group><journal-title xml:lang="en">Surgery and Oncology</journal-title><trans-title-group xml:lang="ru"><trans-title>Хирургия и онкология</trans-title></trans-title-group></journal-title-group><issn publication-format="electronic">2949-5857</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">870</article-id><article-id pub-id-type="doi">10.17650/2949-5857-2026-16-1-116-122</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CASE REPORT</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КЛИНИЧЕСКОЕ НАБЛЮДЕНИЕ</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">Liver resection (bisegmentectomy II + III) in metastatic leiomyosarcoma of the cecum: clinical observation</article-title><trans-title-group xml:lang="ru"><trans-title>Резекция (бисегментэктомия II + III) печени при метастатической лейомиосаркоме слепой кишки: клиническое наблюдение</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3418-5034</contrib-id><name-alternatives><name xml:lang="en"><surname>Muratov</surname><given-names>Andrey A.</given-names></name><name xml:lang="ru"><surname>Муратов</surname><given-names>Андрей Анатольевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>murat.irk@mail.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/0000-0002-3671-1459</contrib-id><name-alternatives><name xml:lang="en"><surname>Rasulov</surname><given-names>R. I.</given-names></name><name xml:lang="ru"><surname>Расулов</surname><given-names>Р. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>murat.irk@mail.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/0000-0003-2933-1981</contrib-id><name-alternatives><name xml:lang="en"><surname>Ponomarenko</surname><given-names>A. P.</given-names></name><name xml:lang="ru"><surname>Пономаренко</surname><given-names>А. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>murat.irk@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-9923-1751</contrib-id><name-alternatives><name xml:lang="en"><surname>Bulytov</surname><given-names>A. M.</given-names></name><name xml:lang="ru"><surname>Булытов</surname><given-names>А. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>murat.irk@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-6382-1969</contrib-id><name-alternatives><name xml:lang="en"><surname>Malykh</surname><given-names>D. O.</given-names></name><name xml:lang="ru"><surname>Малых</surname><given-names>Д. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>murat.irk@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-4009-8088</contrib-id><name-alternatives><name xml:lang="en"><surname>Tsydenzhapov</surname><given-names>B. D.</given-names></name><name xml:lang="ru"><surname>Цыденжапов</surname><given-names>Б. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>murat.irk@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Irkutsk State Medical Academy of Postgraduate Education – Branch of the Russian Medical Academy of Continuing Professional Education, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">Иркутская государственная медицинская академия последипломного образования – филиал ФГБОУ ДПО «Российская медицинская академия непрерывного профессионального образования» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Irkutsk Regional Cancer Center</institution></aff><aff><institution xml:lang="ru">ГБУЗ «Областной онкологический диспансер»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2026</year></pub-date><volume>16</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>116</fpage><lpage>122</lpage><history><date date-type="received" iso-8601-date="2025-11-20"><day>20</day><month>11</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, ABV-press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, АБВ-пресс</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">ABV-press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</copyright-holder><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://onco-surgery.info/jour/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://onco-surgery.info/jour/article/view/870">https://onco-surgery.info/jour/article/view/870</self-uri><abstract xml:lang="en"><p><bold>Background.</bold> Leiomyosarcoma of the colon is a rare tumor of the gastrointestinal tract, the main treatment for which is radical surgical removal. Leiomyosarcomas are characterized by high malignant potential and a tendency to metastasize through the bloodstream to the lungs and liver. Surgical removal of metastatic foci in this group of patients is the only treatment option that can increase long-term survival.</p> <p><bold>Case report.</bold> The article presents a clinical case of surgical treatment of a 45-year-old female patient with metachronous metastasis of cecal leiomyosarcoma to the left lobe of the liver. The patient had previously undergone right-sided hemicolectomy, with a medical history of 19 months. During the next follow-up examination, a metastasis in the left lateral section of the liver was found. The multidisciplinary oncology team decided to perform liver resection followed by chemotherapy as the first step. The patient underwent left-sided bisegmentectomy (II + III) using the Arantius-first approach. The postoperative period was smooth. The patient is receiving drug antitumor therapy.</p> <p><bold>Conclusion. </bold>The treatment of patients with distant metastases of leiomyosarcoma is a complex oncological task requiring the participation of a multidisciplinary team of specialists. Combined treatment of metachronous metastatic disease in leiomyosarcoma can increase long-term survival and improve the patient’s quality of life.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Лейомиосаркома толстой кишки – редкая опухоль желудочно-кишечного тракта, основным методом лечения которой является радикальное хирургическое удаление. Лейомиосаркомы отличаются высоким потенциалом злокачественности и склонностью к гематогенному метастазированию в легкие и печень. Хирургическое удаление метастатических очагов у данной группы пациентов – единственный вариант лечения, позволяющий увеличить отдаленную выживаемость.</p> <p><bold>Клинический случай.</bold> В статье представлено клиническое наблюдение хирургического лечения женщины 45 лет с метахронным метастазом лейомиосаркомы слепой кишки в левую долю печени. Ранее пациентке выполнена правосторонняя гемиколэктомия, анамнез заболевания составил 19 мес. Во время очередного контрольного обследования выявлен метастаз, занимающий левую латеральную секцию печени. Онкологическим междисциплинарным консилиумом решено выполнить резекцию печени с последующей химиотерапией. Пациентка оперирована в объеме левосторонней бисегментэктомии (II + III) с использованием доступа Arantius-first. Послеоперационный период протекал нормально. Пациентка получает лекарственную противоопухолевую терапию.</p> <p><bold>Заключение.</bold> Лечение пациентов с отдаленными метастазами лейомиосаркомы – сложная онкологическая задача, требующая участия мультидисциплинарной команды специалистов. Комбинированное лечение метахронной метастатической болезни при лейомиосаркоме позволяет увеличить отдаленную выживаемость и улучшить качество жизни пациента.</p></trans-abstract><kwd-group xml:lang="en"><kwd>leiomyosarcoma</kwd><kwd>liver resection</kwd><kwd>liver metastasis</kwd><kwd>mesenchymal colon tumors</kwd><kwd>Arantius duct</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лейомиосаркома</kwd><kwd>резекция печени</kwd><kwd>метастаз в печень</kwd><kwd>мезенхимальная опухоль толстой кишки</kwd><kwd>Аранциев проток</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Øines M.N., Smith H.G., Preisler L. et al. 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