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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">Russian Journal of Pediatric Surgery, Anesthesia and Intensive Care</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Pediatric Surgery, Anesthesia and Intensive Care</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский вестник детской хирургии, анестезиологии и реаниматологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2219-4061</issn><issn publication-format="electronic">2587-6554</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1868</article-id><article-id pub-id-type="doi">10.17816/psaic1868</article-id><article-id pub-id-type="edn">CJCDWJ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Case reports</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинические случаи</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">Abdominal Inflammatory Myofibroblastic Tumor in an Infant: a Case Report</article-title><trans-title-group xml:lang="ru"><trans-title>Воспалительная миофибробластическая опухоль брюшной полости у грудного ребенка: клинический случай</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>婴儿腹腔炎性肌纤维母细胞瘤：临床病例</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4885-123X</contrib-id><contrib-id contrib-id-type="spin">9042-5092</contrib-id><name-alternatives><name xml:lang="en"><surname>Stalmakhovich</surname><given-names>Victor N.</given-names></name><name xml:lang="ru"><surname>Стальмахович</surname><given-names>Виктор Николаевич</given-names></name><name xml:lang="zh"><surname>Stalmakhovich</surname><given-names>Victor N.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><bio xml:lang="zh"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><email>stal.irk@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2332-9285</contrib-id><contrib-id contrib-id-type="spin">3813-8271</contrib-id><name-alternatives><name xml:lang="en"><surname>Kaygorodova</surname><given-names>Irina N.</given-names></name><name xml:lang="ru"><surname>Кайгородова</surname><given-names>Ирина Николаевна</given-names></name><name xml:lang="zh"><surname>Kaygorodova</surname><given-names>Irina N.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><bio xml:lang="zh"><p>MD, Cand. Sci. (Medicine)</p></bio><email>kaygorodova_ir@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0003-8792</contrib-id><contrib-id contrib-id-type="spin">3415-9266</contrib-id><name-alternatives><name xml:lang="en"><surname>Dmitrienko</surname><given-names>Anastasia P.</given-names></name><name xml:lang="ru"><surname>Дмитриенко</surname><given-names>Анастасия Прокопьевна</given-names></name><name xml:lang="zh"><surname>Dmitrienko</surname><given-names>Anastasia P.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><bio xml:lang="zh"><p>MD, Cand. Sci. (Medicine)</p></bio><email>AnDmitr2013@yandex.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1911-4468</contrib-id><contrib-id contrib-id-type="spin">9210-5286</contrib-id><name-alternatives><name xml:lang="en"><surname>Strashinsky</surname><given-names>Alexey S.</given-names></name><name xml:lang="ru"><surname>Страшинский</surname><given-names>Алексей Сергеевич</given-names></name><name xml:lang="zh"><surname>Strashinsky</surname><given-names>Alexey S.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>leksus642@icloud.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1767-811X</contrib-id><contrib-id contrib-id-type="spin">4250-9247</contrib-id><name-alternatives><name xml:lang="en"><surname>Barakin</surname><given-names>Alexander O.</given-names></name><name xml:lang="ru"><surname>Баракин</surname><given-names>Александр Олегович</given-names></name><name xml:lang="zh"><surname>Barakin</surname><given-names>Alexander O.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>pacemaker@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7956-3804</contrib-id><contrib-id contrib-id-type="spin">8546-3392</contrib-id><name-alternatives><name xml:lang="en"><surname>Kostyunin</surname><given-names>Kirill Yu.</given-names></name><name xml:lang="ru"><surname>Костюнин</surname><given-names>Кирилл Юрьевич</given-names></name><name xml:lang="zh"><surname>Kostyunin</surname><given-names>Kirill Yu.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kostjunin@gmail.ru</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Irkutsk State Medical Academy of Postgraduate Education</institution></aff><aff><institution xml:lang="ru">Иркутская государственная медицинская академия последипломного образования</institution></aff><aff><institution xml:lang="zh">Irkutsk State Medical Academy of Postgraduate Education</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Ivano-Matreninskaya Children’s City Clinical Hospital</institution></aff><aff><institution xml:lang="ru">Городская Ивано-Матренинская детская клиническая больница</institution></aff><aff><institution xml:lang="zh">Ivano-Matreninskaya Children’s City Clinical Hospital</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Irkutsk State Regional Children’s Clinical Hospital</institution></aff><aff><institution xml:lang="ru">Иркутская государственная областная детская клиническая больница</institution></aff><aff><institution xml:lang="zh">Irkutsk State Regional Children’s Clinical Hospital</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Irkutsk Regional Clinical Consulting and Diagnostic Center</institution></aff><aff><institution xml:lang="ru">Иркутский областной клинический консультативно-диагностический центр</institution></aff><aff><institution xml:lang="zh">Irkutsk Regional Clinical Consulting and Diagnostic Center</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-07-15" publication-format="electronic"><day>15</day><month>07</month><year>2025</year></pub-date><volume>15</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><issue-title xml:lang="zh"/><fpage>253</fpage><lpage>260</lpage><history><date date-type="received" iso-8601-date="2024-12-04"><day>04</day><month>12</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2025-05-30"><day>30</day><month>05</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Эко-Вектор</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; 2025,</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://eco-vector.com/for_authors.php#07</ali:license_ref></license></permissions><self-uri xlink:href="https://rps-journal.ru/jour/article/view/1868">https://rps-journal.ru/jour/article/view/1868</self-uri><abstract xml:lang="en"><p>Inflammatory myofibroblastic tumor is a rare neoplasm of childhood with uncertain biological potential. In more than half of the cases, inflammatory myofibroblastic tumor pathogenesis is associated with <italic>ALK</italic> gene translocations. The standard treatment is radical surgical treatment. In patients with inoperable, recurrent, or metastatic forms of the disease—which are extremely rare—therapeutic options remain very limited. This article presents a case report of an 8-month-old patient diagnosed with an abdominal inflammatory myofibroblastic tumor. The abdominal mass was initially noticed by the parents. No specific clinical symptoms were observed. Upon examination at the clinic, a multinodular mass was localized to the omentum, ascending colon, and parietal peritoneum. Magnetic resonance imaging and abdominal ultrasound were used as the primary diagnostic modalities during the preoperative stage. Blood tests, including clinical and biochemical parameters, showed no significant abnormalities, and tumor markers were negative. Surgical treatment was indicated due to the presence of a large abdominal mass, with its topography confirmed by contrast-enhanced magnetic resonance imaging angiography. A median laparotomy was performed, followed by tumor excision, subtotal omentectomy, resection of the ascending colon, and colo-colonic anastomosis. The postoperative course was uneventful. The outcome was full recovery. The presented case of an abdominal inflammatory myofibroblastic tumor highlights the need to include this tumor type in the differential diagnosis of abdominal masses in young children. A notable feature of this case is the asymptomatic course and the radical excision of multiple nodules with varying locations, which serves as a predictor of favorable prognosis. No additional therapy was required due to the completeness of surgical treatment.</p></abstract><trans-abstract xml:lang="ru"><p>Воспалительная миофибробластическая опухоль — редкий вид новообразований детского возраста, имеющих неопределенный биологический потенциал. В более половины случаев в основе патогенеза воспалительной миофибробластической опухоли лежат транслокации гена <italic>ALK</italic>. Стандартом терапии является радикальное хирургическое лечение. У пациентов с неоперабельными/рецидивирующими или метастатическими формами, что встречается крайне редко, терапевтические опции весьма ограничены. В статье представлен клинический случай лечения пациента в возрасте 8 мес. с воспалительной миофибробластической опухолью брюшной полости. Образование в животе ребенка родители выявили самостоятельно. Специфических клинических симптомов заболевания не отмечалось. При обследовании в клинике многоузловое образование локализовалось в сальнике, восходящем отделе толстой кишки, париетальной брюшине. В качестве основного метода диагностики на дооперационном этапе выполняли магнитно-резонансную томографию и ультразвуковое исследование органов брюшной полости. Значимых отклонений в клинических и биохимических анализах крови не зафиксировано, онкомаркеры отрицательные. Показанием к оперативному лечению было наличие объемного образования, топография которого была подтверждена магнитно-резонансной томографией с контрастированием сосудов. Выполнена операция: срединная лапаротомия, удаление опухоли, субтотальная резекция сальника, резекция восходящего отдела толстой кишки, коло-колоанастомоз. Послеоперационный период протекал без осложнений. Исход лечения — выздоровление. Представленный случай развития воспалительной миофибробластической опухоли брюшной полости показывает необходимость включения данного вида опухоли в дифференциально-диагностический ряд у детей раннего возраста с объемными образованиями брюшной полости. Особенность данного случая — бессимптомное развитие заболевания и радикальное удаление множественных узлов различной локализации, что является предиктором хорошего прогноза. Поэтому дополнительные опции терапии не предпринимались ввиду радикального хирургического лечения.</p></trans-abstract><trans-abstract xml:lang="zh"><p>炎性肌纤维母细胞瘤是一种罕见的儿童期肿瘤，具有未明确界定的生物学潜能。在超过一半的病例中，炎性肌纤维母细胞瘤的发病机制与ALK基因易位有关。治疗标准为根治性手术切除。对于极为罕见的不可切除、复发或转移性病例，治疗手段十分有限。本文报告一例8个月大婴儿腹腔炎性肌纤维母细胞瘤的临床病例。患儿腹部包块由父母自行发现。未表现出该病的特异性临床症状。在临床检查中发现多结节性肿瘤，局限于网膜、升结肠和壁层腹膜。术前主要采用腹部磁共振成像和超声作为诊断方法。血液临床与生化指标无明显异常，肿瘤标志物为阴性。手术指征为存在占位性病灶，其部位经血管对比增强磁共振成像明确。实施了正中开腹手术，切除肿瘤，行次全网膜切除、升结肠切除及结肠-结肠吻合术。术后过程顺利，无并发症。治疗结果为痊愈。该病例显示，对于腹腔内出现占位性病变的婴幼儿，应将腹腔炎性肌纤维母细胞瘤纳入鉴别诊断范围。该病例的特点是疾病过程无症状，多个结节分布于不同部位，且实现了根治性切除，这为良好预后提供了重要依据。因此， 因已实施根治性手术治疗，未采用其他治疗手段。</p></trans-abstract><kwd-group xml:lang="en"><kwd>inflammatory multinodular myofibroblastic tumor</kwd><kwd>children</kwd><kwd>abdominal cavity</kwd><kwd>surgical treatment</kwd><kwd>case report</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>воспалительная многоузловая миофибробластическая опухоль</kwd><kwd>дети</kwd><kwd>брюшная полость</kwd><kwd>хирургическое лечение</kwd><kwd>клинический случай</kwd></kwd-group><kwd-group xml:lang="zh"><kwd>炎性肌纤维母细胞瘤</kwd><kwd>儿童</kwd><kwd>腹腔</kwd><kwd>手术治疗</kwd><kwd>临床病例</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Suleymanova AM, Kachanov DYu, Imyanitov EN, et al. 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