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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">474</article-id><article-id pub-id-type="doi">10.17650/2073-8803-2024-19-2-49-63</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">Pontocerebellar hypoplasia caused by the <italic>TSEN54</italic> mutation: clinical and electroencephalographic characteristics based on 3 cases</article-title><trans-title-group xml:lang="ru"><trans-title>Понтоцеребеллярная гипоплазия, обусловленная мутацией <italic>TSEN54</italic>: клиническая и электроэнцефалографическая характеристика на примере 3 случаев</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6125-0618</contrib-id><name-alternatives><name xml:lang="en"><surname>Bobylova</surname><given-names>M. Yu.</given-names></name><name xml:lang="ru"><surname>Бобылова</surname><given-names>М. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Mariya Yuryevna Bobylova</p><p>8, 5 Nagornaya St., Troitsk, Moscow 108842</p><p>9 Akad. Anokhina St., Moscow 119571</p></bio><bio xml:lang="ru"><p>Мария Юрьевна Бобылова</p><p>108842 Москва, Троицк, ул. Нагорная, 5, 8</p><p>119571 Москва, ул. Академика Анохина, 9</p></bio><email>mariya_bobylova@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Abramov</surname><given-names>M. O.</given-names></name><name xml:lang="ru"><surname>Абрамов</surname><given-names>М. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>8, 5 Nagornaya St., Troitsk, Moscow 108842</p></bio><bio xml:lang="ru"><p>108842 Москва, Троицк, ул. Нагорная, 5, 8</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8855-7740</contrib-id><name-alternatives><name xml:lang="en"><surname>Mukhin</surname><given-names>K. Yu.</given-names></name><name xml:lang="ru"><surname>Мухин</surname><given-names>К. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>8, 5 Nagornaya St., Troitsk, Moscow 108842</p><p>9 Akad. Anokhina St., Moscow 119571</p></bio><bio xml:lang="ru"><p>108842 Москва, Троицк, ул. Нагорная, 5, 8</p><p>119571 Москва, ул. Академика Анохина, 9</p></bio><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Svt. Luka’s Institute of Child Neurology and Epilepsy</institution></aff><aff><institution xml:lang="ru">ООО «Институт детской неврологии и эпилепсии им. Святителя Луки»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Svt. Luka’s Institute of Child and Adult Neurology and Epilepsy</institution></aff><aff><institution xml:lang="ru">ООО «Институт детской и взрослой неврологии и эпилепсии им. Святителя Луки»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2024</year></pub-date><volume>19</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>49</fpage><lpage>63</lpage><history><date date-type="received" iso-8601-date="2024-07-18"><day>18</day><month>07</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-07-18"><day>18</day><month>07</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/474">https://rjdn.abvpress.ru/jour/article/view/474</self-uri><abstract xml:lang="en"><p>Pontocerebellar hypoplasia caused by the <italic>TSEN54</italic> mutation is a severe hereditary disease with an autosomal recessive mode of inheritance, which is characterized by a combination of epileptic encephalopathy, motor disorders in the form of spasticity and hyperknesis, dysphagia and central respiratory failure. At birth there may be multiple joint contractures, muscle hypotonia, and central respiratory failure. Epilepsy occurs in 82 % of cases. Seizures may begin after birth, with an average age of onset of 2.5 years. Various types of seizures are noted (febrile seizures, bilateral tonic-clonic, atypical absence, myoclonic, tonic, focal and atonic seizures), usually resistant to antiepileptic drugs. Magnetic resonance imaging reveals hypoplasia of the pons and cerebellum, which makes it possible to distinguish this disease from cerebral palsy. In the literature there are few descriptions of the clinical picture and electroencephalogram of patients. In this regard, our description of 3 cases of epilepsy and electroencephalographic data in patients with <italic>TSEN54</italic> mutation (all female) is of interest to child neurologists and epileptologists.</p></abstract><trans-abstract xml:lang="ru"><p>Понтоцеребеллярная гипоплазия, обусловленная мутацией гена <italic>TSEN54</italic>, – тяжелое наследственное заболевание с аутосомно-рецессивным типом наследования, которое характеризуется сочетанием эпилептической энцефалопатии, двигательных нарушений в виде спастичности и гиперкинезов, дисфагии и центрального нарушения дыхания. При рождении могут выявляться множественные контрактуры суставов, гипотония, центральное нарушение дыхания. Эпилепсия встречается в 82 % случаев. Приступы могут дебютировать после рождения, средний возраст дебюта – 2,5 года. Отмечаются различные типы приступов (фебрильные приступы, билатеральные тонико-клонические, атипичные абсансы, миоклонические, тонические, фокальные и атонические приступы); приступы, как правило, резистентны к противоэпилептическим препаратам. Магнитно-резонансная томография выявляет гипоплазию моста и мозжечка, что позволяет отличить это заболевание от детского церебрального паралича. В мировой литературе существует немного описаний клинической картины и электроэнцефалограммы пациентов с данным заболеванием. В связи с этим наше описание 3 случаев эпилепсии и данных электроэнцефалографии при понтоцеребеллярной гипоплазии, вызванной мутацией в гене <italic>TSEN54</italic> (все пациенты женского пола), представляется интересным для детских неврологов и эпилептологов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>pontocerebellar hypoplasia</kwd><kwd><italic>TSEN54</italic> mutation</kwd><kwd>epilepsy</kwd><kwd>hyperkinesis</kwd><kwd>video electroencephalographic monitoring</kwd><kwd>epileptic-dyskinetic encephalopathy</kwd><kwd>developmental and epileptic encephalopathy with spike-wave activation in sleep</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>понтоцеребеллярная гипоплазия</kwd><kwd>мутация <italic>TSEN54</italic></kwd><kwd>эпилепсия</kwd><kwd>гиперкинезы</kwd><kwd>видеоэлектроэнцефалографический мониторинг</kwd><kwd>эпилептически-дискинетическая энцефалопатия</kwd><kwd>энцефалопатия развития и эпилептическая со спайк-волновой активацией во сне</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">Proposed Classification &amp; Definition of Epilepsy Syndromes 2021 with discussion. 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