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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">Terapevticheskii arkhiv</journal-id><journal-title-group><journal-title xml:lang="en">Terapevticheskii arkhiv</journal-title><trans-title-group xml:lang="ru"><trans-title>Терапевтический архив</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0040-3660</issn><issn publication-format="electronic">2309-5342</issn><publisher><publisher-name xml:lang="en">LLC Obyedinennaya Redaktsiya</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">46449</article-id><article-id pub-id-type="doi">10.26442/00403660.2022.03.201404</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 наблюдения</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">Differential diagnosis of pneumonia as a complication of nasal liquorrhea in the context of the COVID-19 pandemic: Case report</article-title><trans-title-group xml:lang="ru"><trans-title>Дифференциальный диагноз пневмонии при назальной ликворее в условиях пандемии COVID-19. Клиническое наблюдение</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4895-233X</contrib-id><name-alternatives><name xml:lang="en"><surname>Chernikova</surname><given-names>Nadezhda A.</given-names></name><name xml:lang="ru"><surname>Черникова</surname><given-names>Надежда Алексеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>мл. науч. сотр., врач отд. оториноларингологии</p></bio><email>Chernikhope@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8249-9153</contrib-id><name-alternatives><name xml:lang="en"><surname>Shelesko</surname><given-names>Elizaveta V.</given-names></name><name xml:lang="ru"><surname>Шелеско</surname><given-names>Елизавета Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>канд. мед. наук, зав. отд. оториноларингологии</p></bio><email>Chernikhope@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3777-5662</contrib-id><name-alternatives><name xml:lang="en"><surname>Sharipov</surname><given-names>Oleg I.</given-names></name><name xml:lang="ru"><surname>Шарипов</surname><given-names>Олег Ильдарович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>канд. мед. наук, нейрохирург отд. патологии основания черепа</p></bio><email>Chernikhope@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9658-807X</contrib-id><name-alternatives><name xml:lang="en"><surname>Ershova</surname><given-names>Olga N.</given-names></name><name xml:lang="ru"><surname>Ершова</surname><given-names>Ольга Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>д-р мед. наук, эпидемиолог</p></bio><email>Chernikhope@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9333-9473</contrib-id><name-alternatives><name xml:lang="en"><surname>Kalinin</surname><given-names>Pavel L.</given-names></name><name xml:lang="ru"><surname>Калинин</surname><given-names>Павел Львович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>д-р мед. наук, зав. отд. патологии основания черепа</p></bio><email>Chernikhope@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6520-4296</contrib-id><name-alternatives><name xml:lang="en"><surname>Kutin</surname><given-names>Maxim A.</given-names></name><name xml:lang="ru"><surname>Кутин</surname><given-names>Максим Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>канд. мед. наук, нейрохирург отд. патологии основания черепа</p></bio><email>Chernikhope@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5323-1000</contrib-id><name-alternatives><name xml:lang="en"><surname>Fomichev</surname><given-names>Dmitry V.</given-names></name><name xml:lang="ru"><surname>Фомичев</surname><given-names>Дмитрий Владиславович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>канд. мед. наук, нейрохирург отд. патологии основания черепа</p></bio><email>Chernikhope@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Burdenko National Medical Research Center for Neurosurgery</institution></aff><aff><institution xml:lang="ru">ФГАУ «Национальный медицинский исследовательский центр нейрохирургии им. акад. Н.Н. Бурденко» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2022</year></pub-date><volume>94</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>420</fpage><lpage>426</lpage><history><date date-type="received" iso-8601-date="2020-10-06"><day>06</day><month>10</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Consilium Medicum</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, ООО "Консилиум Медикум"</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Consilium Medicum</copyright-holder><copyright-holder xml:lang="ru">ООО "Консилиум Медикум"</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-nc-sa/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://ter-arkhiv.ru/0040-3660/article/view/46449">https://ter-arkhiv.ru/0040-3660/article/view/46449</self-uri><abstract xml:lang="en"><p>Nasal liquorrhea – the outflow of cerebrospinal fluid from the cerebrospinal fluid spaces of the cranial cavity into the nasal cavity or paranasal sinuses due to the presence of a congenital or acquired defect in the bones of the skull base and meninges of various etiologies. Nasal liquorrhea leads to potentially fatal complications: meningitis, meningoencephalitis, pneumocephalus, brain abscess. Also, with nasal liquorrhea, less dangerous complications may occur: aspiration bronchopneumonia and gastritis. The article presents a case of aspiration pneumonia in two patients with nasal liquorrhea treated at the Burdenko National Medical Research Center for Neurosurgery during the COVID-19 pandemic. Both patients noted the profuse nature of the nasal liquorrhea, complained of coughing in a horizontal position. In both cases, no RNA virus (SARS-CoV-2) was detected during the polymerase chain reaction. Antibodies (IgG, M) to coronavirus were not detected. Computed tomography of the chest organs in both cases revealed areas of frosted glass darkening. Since no data was obtained for coronavirus infection (negative tests for coronavirus, lack of antibodies), changes in the lungs were interpreted as a consequence of constant aspiration of CSF. The patients were admitted to a separate ward. Both patients underwent endoscopic endonasal plasty of the skull base defect. The postoperative period in both cases was uneventful. In both cases, the patients underwent computer tomography scan of the chest organs one month later. On the photographs, the signs of pneumonia completely regressed.</p></abstract><trans-abstract xml:lang="ru"><p>Назальная ликворея – истечение цереброспинальной жидкости из ликворных пространств полости черепа в полость носа или околоносовые пазухи вследствие наличия врожденного или приобретенного дефекта костей основания черепа и мозговых оболочек различной этиологии. Назальная ликворея приводит к потенциально смертельным осложнениям: менингит, менингоэнцефалит, пневмоцефалия, абсцесс мозга. Также при назальной ликворее возможно возникновение менее опасных осложнений: аспирационной бронхопневмонии и гастрита. В статье приводится случай аспирационной пневмонии у 2 пациентов с назальной ликвореей, проходивших лечение в ФГАУ «НМИЦН им. акад. Н.Н. Бурденко» во время пандемии COVID-19. Оба пациента отмечали профузный характер назальной ликвореи, жаловались на кашель в горизонтальном положении. В обоих случаях в ходе выполнения полимеразной цепной реакции РНК вируса (SARS-CoV-2) не обнаружена. Антитела (иммуноглобулин G, иммуноглобулин M) к коронавирусу не выявлены. На компьютерной томографии органов грудной клетки в обоих случаях выявлены участки затемнения по типу «матового стекла». Так как данных в пользу коронавирусной инфекции не получено (отрицательные тесты на коронавирус, отсутствие антител), изменения в легких интерпретированы как следствие постоянной аспирации ликвора. Пациентов госпитализировали в отдельную палату. Обоим пациентам проведена эндоскопическая эндоназальная пластика дефекта основания черепа. Послеоперационный период в обоих случаях протекал без особенностей. В обоих случаях пациенты выполнили через месяц компьютерную томографию органов грудной клетки. На снимках признаки пневмонии полностью регрессировали.</p></trans-abstract><kwd-group xml:lang="en"><kwd>nasal liquorrhea</kwd><kwd>skull base defect</kwd><kwd>aspiration pneumonia</kwd><kwd>skull base</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>назальная ликворея</kwd><kwd>дефект основания черепа</kwd><kwd>аспирационная пневмония</kwd><kwd>основание черепа</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Schlosser RJ, Woodworth BA, Wilensky EM, et al. Spontaneous cerebrospinal fluid leaks: a variant of benign intracranial hypertension. Ann Otol Rhinol Laryngol. 2006;115:495-500. DOI:10.1177/000348940611500703</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Dias E, Dias M. Recurrent meningitis in a child with intranasal encephalocele. J Neurosci Rural Pract. 2012;3(1):102-3. 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