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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Child Neurology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Child Neurology</journal-title><trans-title-group xml:lang="ru"><trans-title>Русский журнал детской неврологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2073-8803</issn><issn publication-format="electronic">2412-9178</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">461</article-id><article-id pub-id-type="doi">10.17650/2073-8803-2024-19-1-54-60</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CLINICAL OBSERVATIONS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЕ НАБЛЮДЕНИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Wernicke encephalopathy in combination with acute polyneuropathy under the guise of a demyelinating disease in a teenager with an eating disorder</article-title><trans-title-group xml:lang="ru"><trans-title>Энцефалопатия Вернике в сочетании с острой полиневропатией под маской демиелинизирующего заболевания у подростка с расстройством пищевого поведения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-1864-2381</contrib-id><name-alternatives><name xml:lang="en"><surname>Ovchinnikova</surname><given-names>E. O.</given-names></name><name xml:lang="ru"><surname>Овчинникова</surname><given-names>Е. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Evgenia Olegovna Ovchinnikova</p><p>61/2 Shchepkina St., Moscow 129110</p></bio><bio xml:lang="ru"><p>Евгения Олеговна Овчинникова</p><p>129110 Москва, ул. Щепкина, 61/2</p></bio><email>ovjane@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2988-5706</contrib-id><name-alternatives><name xml:lang="en"><surname>Kotov</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Котов</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>61/2 Shchepkina St., Moscow 129110</p></bio><bio xml:lang="ru"><p>129110 Москва, ул. Щепкина, 61/2</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4099-8202</contrib-id><name-alternatives><name xml:lang="en"><surname>Panteleeva</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Пантелеева</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>61/2 Shchepkina St., Moscow 129110</p></bio><bio xml:lang="ru"><p>129110 Москва, ул. Щепкина, 61/2</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8145-7023</contrib-id><name-alternatives><name xml:lang="en"><surname>Mukhina</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Мухина</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>61/2 Shchepkina St., Moscow 129110</p></bio><bio xml:lang="ru"><p>129110 Москва, ул. Щепкина, 61/2</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">M.F. Vladimirskiy Moscow Regional Research Clinical Institute</institution></aff><aff><institution xml:lang="ru">ГБУЗ МО «Московский областной научно-исследовательский клинический институт им. М.Ф. Владимирского»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2024</year></pub-date><volume>19</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><history><date date-type="received" iso-8601-date="2024-04-07"><day>07</day><month>04</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-04-07"><day>07</day><month>04</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, ABV-Press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, АБВ-пресс</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">ABV-Press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</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://rjdn.abvpress.ru/jour/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://rjdn.abvpress.ru/jour/article/view/461">https://rjdn.abvpress.ru/jour/article/view/461</self-uri><abstract xml:lang="en"><p>Wernicke encephalopathy is a neuropsychiatric syndrome characterized by three main symptoms: oculomotor disturbances, cerebellar ataxia, and psychiatric disturbances. The condition is associated with a high mortality and morbidity rate. Wernicke encephalopathy is most commonly seen in adolescent children presenting with a vitamin B1 deficiency. Thiamine deficiency may also cause polyneuritis syndrome, with or without the aforementioned symptoms. The condition is characterized by sensory-motor impairments in a symmetrical pattern, dysarthria, and paresis or even paralysis of the lower limbs. This report focuses on an adolescent case presenting acute oculomotor paresis, nystagmus, leg weakness, impaired gait, decreased deep tendon reflexes, cognitive impairment, and a history of recurrent vomiting, prolonged starvation, and eating behaviour disorders. The magnetic resonance imaging scan reveals symmetrical pathological foci of increased intensity in T2 in the periaqueductal region, at the Magendie’s central aperture. The patient displays a mixed motor-sensory polyneuropathic syndrome affecting both lower limbs, primarily of the axonopathy type, based on electroneuromyography data. Positive outcomes such as restored eyeball movement, enhanced gait, increased muscle strength in the lower legs and feet, and better management of sensory disorders have occurred due to thiamine treatment.</p></abstract><trans-abstract xml:lang="ru"><p>Энцефалопатия Вернике (ЭВ) – острый нейропсихиатрический синдром, клинически характеризующийся триадой: глазодвигательными нарушениями, мозжечковой атаксией, психическими нарушениями, а также высокой заболеваемостью и смертностью. ЭВ является наиболее частым клиническим проявлением дефицита витамина В1 у детей подросткового возраста. Дефицит тиамина может проявляться полиневритическим синдромом (в сочетании с ЭВ или без нее) в виде симметричных сенсорно-моторных нарушений, дизартрии, пареза или паралича нижних конечностей. Мы представляем клинический случай подростка с ЭВ с остро возникшими неврологическими нарушениями (парез глазодвигательных мышц, нистагм, слабость в ногах, нарушение походки, снижение глубоких сухожильных рефлексов в ногах, когнитивные нарушения) после периода многократной рвоты с длительным голоданием в анамнезе на фоне расстройства пищевого поведения. По данным магнитно-резонансной томографии у пациента на Т2-взвешенных изображениях выявлялись симметричные патологические очаги повышенной интенсивности в периакведуктальной области, на уровне срединной апертуры Мажанди, с четкими контурами, по данным электронейромиографии – смешанный моторно-сенсорный полиневропатический синдром обеих нижних конечностей, преимущественно по типу аксонопатии. На фоне лечения тиамином у пациента отмечалась положительная динамика в виде восстановления движений глазных яблок, улучшения походки, увеличения мышечной силы в голенях и стопах, купирования чувствительных расстройств.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Wernicke encephalopathy</kwd><kwd>acute polyneuropathy</kwd><kwd>thiamine deficiency</kwd><kwd>eating disorder</kwd><kwd>acute disseminated encephalomyelitis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>энцефалопатия Вернике</kwd><kwd>острая полиневропатия</kwd><kwd>дефицит тиамина</kwd><kwd>расстройство пищевого поведения</kwd><kwd>острый рассеянный энцефаломиелит</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Grigoryeva V.N., Guzanova E.V., Mukhin V.V. Wernicke encephalopathy, central pontine myelinolysis and polyneuropathy in patients with hyperemesis gravidarum. 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