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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">Annals of Clinical and Experimental Neurology</journal-id><journal-title-group><journal-title xml:lang="en">Annals of Clinical and Experimental Neurology</journal-title><trans-title-group xml:lang="ru"><trans-title>Анналы клинической и экспериментальной неврологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-5473</issn><issn publication-format="electronic">2409-2533</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">330</article-id><article-id pub-id-type="doi">10.17816/psaic330</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Clinical analysis</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинический разбор</subject></subj-group><subj-group subj-group-type="article-type"><subject>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Stroke-like episodes in mitochondrial encephalomyopathy with lactic acidosis</article-title><trans-title-group xml:lang="ru"><trans-title>Инсультоподобные эпизоды при митохондриальной энцефаломиопатии с лактат-ацидозом</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kalashnikova</surname><given-names>Lyudmila A.</given-names></name><name xml:lang="ru"><surname>Калашникова</surname><given-names>Людмила Андреевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kalashnikovaNCN@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dobrynina</surname><given-names>Larisa A.</given-names></name><name xml:lang="ru"><surname>Добрынина</surname><given-names>Лариса Анатольевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kalashnikovaNCN@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sakharova</surname><given-names>Alla V.</given-names></name><name xml:lang="ru"><surname>Сахарова</surname><given-names>Алла Викторовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kalashnikovancn@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chaykovskaya</surname><given-names>Roxana P.</given-names></name><name xml:lang="ru"><surname>Чайковская</surname><given-names>Роксана Петровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kalashnikovaNCN@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mir-Kasimov</surname><given-names>M. F.</given-names></name><name xml:lang="ru"><surname>Мир-Касимов</surname><given-names>M. Ф.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kalashnikovaNCN@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5539-245X</contrib-id><name-alternatives><name xml:lang="en"><surname>Konovalov</surname><given-names>Rodion N.</given-names></name><name xml:lang="ru"><surname>Коновалов</surname><given-names>Родион Николаевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Med.), senior researcher, Neuroradiology department</p></bio><bio xml:lang="ru"><p>к.м.н., с.н.с. отд. лучевой диагностики</p></bio><email>kalashnikovaNCN@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9604-7775</contrib-id><name-alternatives><name xml:lang="en"><surname>Shabalina</surname><given-names>Аlla A.</given-names></name><name xml:lang="ru"><surname>Шабалина</surname><given-names>Алла Анатольевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), leading researcher, Head, Laboratory of hemorheology, hemostasis and pharmacokinetics (with clinical laboratory diagnostics)</p></bio><bio xml:lang="ru"><p>д.м.н., в.н.с., рук. лаб. гемореологии, гемостаза и фармакокинетики (с клинической лабораторной диагностикой)</p></bio><email>kalashnikovaNCN@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kostyreva</surname><given-names>M. M.</given-names></name><name xml:lang="ru"><surname>Костырева</surname><given-names>M. M.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kalashnikovaNCN@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gnezditsky</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Гнездицкий</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kalashnikovaNCN@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Protsky</surname><given-names>S. V.</given-names></name><name xml:lang="ru"><surname>Процкий</surname><given-names>С. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kalashnikovaNCN@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Research Center of Neurology</institution></aff><aff><institution xml:lang="ru">ФГБНУ «Научный центр неврологии»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2010-09-13" publication-format="electronic"><day>13</day><month>09</month><year>2010</year></pub-date><volume>4</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>50</fpage><lpage>58</lpage><history><date date-type="received" iso-8601-date="2017-02-03"><day>03</day><month>02</month><year>2017</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2010, Kalashnikova L.A., Dobrynina L.A., Sakharova A.V., Chaykovskaya R.P., Mir-Kasimov M.F., Konovalov R.N., Shabalina A.A., Kostyreva M.M., Gnezditsky V.V., Protsky S.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2010, Kalashnikova L.A., Dobrynina L.A., Sakharova A.V., Chaykovskaya R.P., Mir-Kasimov M.F., Konovalov R.N., Shabalina A.A., Kostyreva M.M., Gnezditsky V.V., Protsky S.V.</copyright-statement><copyright-year>2010</copyright-year><copyright-holder xml:lang="en">Kalashnikova L.A., Dobrynina L.A., Sakharova A.V., Chaykovskaya R.P., Mir-Kasimov M.F., Konovalov R.N., Shabalina A.A., Kostyreva M.M., Gnezditsky V.V., Protsky S.V.</copyright-holder><copyright-holder xml:lang="ru">Kalashnikova L.A., Dobrynina L.A., Sakharova A.V., Chaykovskaya R.P., Mir-Kasimov M.F., Konovalov R.N., Shabalina A.A., Kostyreva M.M., Gnezditsky V.V., Protsky S.V.</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://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://annaly-nevrologii.com/pathID/article/view/330">https://annaly-nevrologii.com/pathID/article/view/330</self-uri><abstract xml:lang="en"><p>We described two patients (female, 47 years and male, 42 years) with mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes (MELAS). Diagnosis was confirmed by genetic study (A3243G mitochondrial DNA mutation was found), muscle biopsy and elevated lactate level in the blood. Clinical picture of stroke-like episodes was presented by symptoms of mainly involvement of the posterior brain area (fluent and amnestic aphasia, hemianopia, paresis, ataxia), as well as by headache and epileptic seizures. In the first patient stroke-like episodes recurred but their symptoms almost completely regressed with time. The second patient had severe residual neurological deficit. Other clinical manifestations included hearing loss, memory deterioration, cardiomyopathy, fatigue and type 1 diabetes mellitus. MRI in acute period of stroke-like episodes found cortical lesions mainly in the posterior parts of the brain. They completely disappeared in the first case, but persisted in the second patient. The differential diagnosis of stroke-like episodes and ischemic stroke and approaches to treatment are discussed.</p> <p> </p></abstract><trans-abstract xml:lang="ru"><p>Описаны двое больных (женщина 47 лет и мужчина 42 лет) с митохондриальной энцефаломиопатией, лактат-ацидозом и инсультоподобными эпизодами (MELAS). В обоих случаях диагноз MELAS был подтвержден генетическим исследованием (обнаружена мутация митохондриальной ДНК A3243G), мышечной биопсией и повышенным уровнем лактата в крови. Клиническая картина была представлена симптомами поражения преимущественно задних отделов головного мозга (сенсорная и амнестическая афазия, гемианопсия, гемипарезы, атаксия), а также головной болью иэпилептическими припадками. У первой больной симптомы рецидивировали и с течением времени почти полностью регрессировали. У второго больного оставался выраженный неврологический дефицит. Другие клинические проявления включали снижение слуха, памяти, кардиомиопатию, повышенную мышечную утомляемость и сахарный диабет 1 типа. МРТ в остром периоде инсультоподобных эпизодов обнаружила корковые очаги преимущественно в задних отделах головного мозга. У первой больной они практически полностью регрессировали, но у второго больного сохранялись более стойко. Обсуждаются вопросы дифференциального диагноза MELAS и ишемического инсульта, подходы к лечению.</p></trans-abstract><kwd-group xml:lang="en"><kwd>mitochondrial encephalomyopathy</kwd><kwd>stroke-like episodes</kwd><kwd>MELAS</kwd><kwd>ischemic stroke in young adults</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>митохондриальная энцефалопатия</kwd><kwd>инсультоподобные эпизоды</kwd><kwd>MELAS</kwd><kwd>ишемический инсульт в молодом возрасте</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Темин П.А., Никанорова М.Ю., Николаева Е.А. 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