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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">1916</article-id><article-id pub-id-type="doi">10.17816/psaic1916</article-id><article-id pub-id-type="edn">SDHTDM</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">Fibro-adipose vascular anomaly in an adolescent: a case report</article-title><trans-title-group xml:lang="ru"><trans-title>Фиброзно-жировая сосудистая аномалия у подростка: клинический случай</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>青少年纤维脂肪性血管异常：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/0000-0002-5287-7889</contrib-id><contrib-id contrib-id-type="spin">7590-2400</contrib-id><name-alternatives><name xml:lang="en"><surname>Garbuzov</surname><given-names>Roman V.</given-names></name><name xml:lang="ru"><surname>Гарбузов</surname><given-names>Роман Вячеславович</given-names></name><name xml:lang="zh"><surname>Garbuzov</surname><given-names>Roman V.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>д-р мед. наук</p></bio><bio xml:lang="zh"><p>MD, Dr. Sci. (Medicine)</p></bio><email>9369025@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2348-221X</contrib-id><contrib-id contrib-id-type="spin">4700-3655</contrib-id><name-alternatives><name xml:lang="en"><surname>Feoktistova</surname><given-names>Elena V.</given-names></name><name xml:lang="ru"><surname>Феоктистова</surname><given-names>Елена Владимировна</given-names></name><name xml:lang="zh"><surname>Feoktistova</surname><given-names>Elena V.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine), Assistant Professor</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доцент</p></bio><bio xml:lang="zh"><p>MD, Cand. Sci. (Medicine), Assistant Professor</p></bio><email>9433672@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/0000-0003-3317-3058</contrib-id><contrib-id contrib-id-type="spin">2225-1987</contrib-id><name-alternatives><name xml:lang="en"><surname>Mylnikov</surname><given-names>Andrei A.</given-names></name><name xml:lang="ru"><surname>Мыльников</surname><given-names>Андрей Анатольевич</given-names></name><name xml:lang="zh"><surname>Mylnikov</surname><given-names>Andrei A.</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>angio.doctor@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-5675-8353</contrib-id><contrib-id contrib-id-type="spin">5391-7175</contrib-id><name-alternatives><name xml:lang="en"><surname>Stakhova</surname><given-names>Marina B.</given-names></name><name xml:lang="ru"><surname>Стахова</surname><given-names>Марина Борисовна</given-names></name><name xml:lang="zh"><surname>Stakhova</surname><given-names>Marina B.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>marin-stakhov@ya.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9497-4070</contrib-id><contrib-id contrib-id-type="spin">3600-4701</contrib-id><name-alternatives><name xml:lang="en"><surname>Razumovskiy</surname><given-names>Aleksander Yu.</given-names></name><name xml:lang="ru"><surname>Разумовский</surname><given-names>Александр Юрьевич</given-names></name><name xml:lang="zh"><surname>Razumovskiy</surname><given-names>Aleksander Yu.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor, Corresponding Member of the Russian Academy of Sciences</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор, чл.-корр. РАН</p></bio><bio xml:lang="zh"><p>MD, Dr. Sci. (Medicine), Professor, Corresponding Member of the Russian Academy of Sciences</p></bio><email>1595105@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Russian Children’s Clinical Hospital — branch of the N.I. Pirogov Russian National Research Medical University</institution></aff><aff><institution xml:lang="ru">Российская детская клиническая больница — филиал Российского национального медицинского университета им. Н.И. Пирогова</institution></aff><aff><institution xml:lang="zh">Russian Children’s Clinical Hospital — branch of the N.I. Pirogov Russian National Research Medical University</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Pirogov Russian National Research Medical University</institution></aff><aff><institution xml:lang="ru">Российский национальный медицинский университет им. Н.И. Пирогова</institution></aff><aff><institution xml:lang="zh">Pirogov Russian National Research Medical University</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-08-17" publication-format="electronic"><day>17</day><month>08</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-10-16" publication-format="electronic"><day>16</day><month>10</month><year>2025</year></pub-date><volume>15</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><issue-title xml:lang="zh"/><fpage>379</fpage><lpage>388</lpage><history><date date-type="received" iso-8601-date="2025-03-31"><day>31</day><month>03</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-08-17"><day>17</day><month>08</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, Eco-Vector</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><copyright-holder xml:lang="zh">Eco-Vector</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/1916">https://rps-journal.ru/jour/article/view/1916</self-uri><abstract xml:lang="en"><p>Fibro-adipose vascular anomaly is a relatively rare and only recently described disorder with distinctive clinical, radiological, and pathomorphological features. It is crucial for physicians to be fully aware of this condition to ensure timely diagnosis and early initiation of treatment. This article presents the clinical case of a 17-year-old female with fibro-adipose vascular anomaly of the right leg. At the age of 7, she developed a painful lesion in the leg. Over time, the lesion progressively increased in size, accompanied by limb hypotrophy and restricted ankle joint mobility. At the healthcare facility of her place of residence, multiple ultrasound examinations and computed tomography angiography were performed, which led to the diagnosis of mixed angiodysplasia of the right leg. Conservative measures, including physical therapy, compression garments, and orthopedic footwear, were ineffective. Disability was established at the age of 13. At 17, the patient was admitted to the Russian Children’s Clinical Hospital (Moscow). Examination revealed shortening of the right leg and foot, a firm painful mass in the upper third of the leg, hypotrophy of the thigh and calf muscles, and ankle contracture. Ultrasound examination revealed a hyperechoic lesion with indistinct outer margins in the muscles of the upper third of the leg, containing abnormally formed venous vessels with multiple phleboliths. Magnetic resonance imaging of this area confirmed the presence of vascular malformation. Angiography was additionally performed to clarify the angioarchitecture of the lesion and determine the possible extent of resection, leading to the diagnosis Q27.8—fibro-adipose vascular anomaly of the right leg. Given the impossibility of radical surgery due to subtotal involvement of the posterior muscle group of leg, the high risk of progression, pain, and impaired function, anti-proliferative therapy with sirolimus was initiated. Rehospitalization was scheduled after one year to assess treatment efficacy and reconsider surgical options. This case illustrates the challenges of delayed diagnosis, where long-term unrecognized disease progression resulted in disability and precluded one-stage radical treatment.</p></abstract><trans-abstract xml:lang="ru"><p>Фиброзно-жировая сосудистая аномалия — относительно редкое и только сравнительно недавно описанное заболевание с отличительными клиническими, радиологическими и патоморфологическими характеристиками. Крайне важно, чтобы врачи имели полное представление об этом заболевании для обеспечения своевременной диагностики и раннего начала лечения. В статье представлен клинический случай 17-летней девушки с фиброзно-адипозной васкулярной аномалией правой голени. В 7 лет у ребенка появилось болезненное образование на голени. В динамике образование увеличивалось в объеме, прогрессировала гипотрофия конечности наряду с ограничением движений в голеностопном суставе. По месту жительства неоднократно выполняли ультразвуковое исследование и компьютерную ангиографию, установлен диагноз: «Смешанная ангиодисплазия правой голени». Лечение в виде занятий лечебной физкультурой, ношения компрессионного трикотажа и ортопедической обуви эффекта не приносило. В 13 лет установлена инвалидность. В Российскую детскую клиническую больницу (Москва) пациентка поступила в возрасте 17 лет. При осмотре отмечено укорочение правой нижней конечности и стопы, плотное болезненное образование в верхней трети голени, гипотрофия мышц бедра и голени, контрактура правого голеностопного сустава. При ультразвуковом исследовании выявлено гиперэхогенное, с нечеткими наружными контурами образование в мышцах верхней трети голени с расположением в нем аномально сформированных венозных сосудов со множественными флеболитами. По данным магнитно-резонансной томографии этой области подтверждены признаки сосудистой мальформации. С целью уточнения ангиоархитектоники поражения и определения возможного объема резекции дополнительно проведена ангиография, позволившая установить диагноз: «Q27.8 — фиброзно-жировая сосудистая аномалия правой голени». Учитывая невозможность радикального хирургического лечения ввиду субтотального поражения задней группы мышц голени, высокий риск прогрессии заболевания, болевой синдром с нарушением функции конечности, начата антипролиферативная терапия препаратом сиролимус. Повторная госпитализация для оценки эффективности препарата и решения вопроса об оперативном лечении назначена через 1 год. В приведенном случае затрудненная поздняя диагностика заболевания, когда его длительное нераспознанное течение привело к инвалидизации пациента, сделало невозможным одномоментное радикальное лечение.</p></trans-abstract><trans-abstract xml:lang="zh"><p>纤维脂肪性血管异常是一种相对少见且仅在近年才被描述的疾病，具有独特的临床、影像学和病理学特征。医生对该疾病有全面的了解，对于确保及时诊断和早期治疗极为重要。本文报道一例17岁女性患者，确诊为右小腿纤维脂肪性血管异常。患者7岁时右小腿出现疼痛性肿块。随访过程中肿块逐渐增大，同时伴有患肢营养不良及踝关节活动受限。在居住地多次行超声及计算机血管造影检查，诊断为“右小腿混合型血管畸形”。治疗方式包括康复训练、穿戴弹力袜和矫形鞋， 但未见疗效。13岁时被确认为残疾。17岁时入院于Russian Children’s Clinical Hospital（莫斯科）。查体发现右下肢及足缩短，上三分之一小腿有致密疼痛性肿块，伴大腿及小腿肌肉萎缩及踝关节挛缩。 在超声检查中发现小腿上三分之一肌肉内存在一个高回声、外缘不清的病灶，其内部可见异常形成的静脉血管，并伴有多发静脉石。根据该区域的磁共振成像结果，进一步确认了血管畸形的表现。 为明确病灶血管结构及切除范围，行血管造影，最终确诊为“Q27.8 — 右小腿纤维脂肪性血管异常”。由于病变累及小腿后群肌肉广泛，无法根治性切除，加之疾病有进展风险、疼痛明显并影响功能，遂开始应用西罗莫司进行抗增殖治疗。计划一年后复诊以评估疗效并决定手术可行性。在本病例中，因诊断延迟且病程长期未被识别，导致患者致残，从而使根治性一期手术无法实施。</p></trans-abstract><kwd-group xml:lang="en"><kwd>fibro-adipose vascular anomaly</kwd><kwd>vascular anomalies</kwd><kwd>pediatric vascular surgery</kwd><kwd>sirolimus</kwd><kwd>children</kwd><kwd>case report</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>фиброзно-жировая сосудистая аномалия</kwd><kwd>сосудистые аномалии</kwd><kwd>детская сосудистая хирургия</kwd><kwd>сиролимус</kwd><kwd>дети</kwd><kwd>клинический случай</kwd></kwd-group><kwd-group xml:lang="zh"><kwd>纤维脂肪性血管异常</kwd><kwd>血管异常</kwd><kwd>小儿血管外科</kwd><kwd>西罗莫司</kwd><kwd>儿童</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>Alomari AI, Spencer SA, Arnold RW, et al. 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