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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 Skin and Venereal Diseases</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Skin and Venereal Diseases</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский журнал кожных и венерических болезней</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1560-9588</issn><issn publication-format="electronic">2412-9097</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">624987</article-id><article-id pub-id-type="doi">10.17816/dv624987</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>DERMATOLOGY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ДЕРМАТОЛОГИЯ</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">Diagnosis and treatment of oral mucus lesions: case series of four patients</article-title><trans-title-group xml:lang="ru"><trans-title>Диагностика и лечение поражений слизистой оболочки полости рта: кейс-серия с участием четырёх пациентов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5800-4800</contrib-id><contrib-id contrib-id-type="spin">8013-3256</contrib-id><name-alternatives><name xml:lang="en"><surname>Teplyuk</surname><given-names>Natalia P.</given-names></name><name xml:lang="ru"><surname>Теплюк</surname><given-names>Наталия Павловна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Med.), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><email>teplyukn@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1872-9487</contrib-id><contrib-id contrib-id-type="spin">6524-5665</contrib-id><name-alternatives><name xml:lang="en"><surname>Stepanov</surname><given-names>Mikhail A.</given-names></name><name xml:lang="ru"><surname>Степанов</surname><given-names>Михаил Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Med.), Associate Professor</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доцент</p></bio><email>Doctor.stepanov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-1972-871X</contrib-id><contrib-id contrib-id-type="spin">5069-9431</contrib-id><name-alternatives><name xml:lang="en"><surname>Dodina</surname><given-names>Mariya I.</given-names></name><name xml:lang="ru"><surname>Додина</surname><given-names>Мария Игоревна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>midd@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4162-2928</contrib-id><name-alternatives><name xml:lang="en"><surname>Damdinova</surname><given-names>Baira Sh.</given-names></name><name xml:lang="ru"><surname>Дамдинова</surname><given-names>Баира Шойсороновна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>baira_d@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">I.M. Sechenov First Moscow State Medical University</institution></aff><aff><institution xml:lang="ru">Первый Московский государственный медицинский университет имени И.М. Сеченова (Сеченовский Университет)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-05-14" publication-format="electronic"><day>14</day><month>05</month><year>2024</year></pub-date><volume>27</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>155</fpage><lpage>168</lpage><history><date date-type="received" iso-8601-date="2023-12-25"><day>25</day><month>12</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2024-03-17"><day>17</day><month>03</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Эко-Вектор</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2027-05-14"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0/</ali:license_ref></license></permissions><self-uri xlink:href="https://rjsvd.com/1560-9588/article/view/624987">https://rjsvd.com/1560-9588/article/view/624987</self-uri><abstract xml:lang="en"><p> </p><p> </p>  <p> </p><p>One of the pressing issues in dermatovenerological and stomatological practices pertains to diseases of the oral mucosa. This challenge is primarily attributed to the intricacies associated with diagnosing these conditions in their early stages, the resemblance of clinical presentations to various oral mucosal lesions, and the potential lack of awareness among healthcare practitioners. Diseases such as lichen planus, herpes simplex, erythema multiforme exudative with skin lesions and vulgar pemphigus are characterized by a particularly persistent long-term course, thereby reducing the patient's ability to work and the overall quality of life. A multitude of endogenous and exogenous factors can influence the state of the oral mucosa. Endogenous factors encompass genetic predisposition, endocrine disturbances, carbohydrate metabolism disorders, neurogenic disorders, autoimmune conditions and infectious diseases. Exogenous factors, as a rule, include taking medications (non-steroidal anti-inflammatory drugs, antibiotics), galvanism, excessive use of alcohol and narcotic substances, and others.</p> <p>It should be noted that the condition of the oral mucosa is also influenced by a wide range of different trigger factors.</p> <p>The narrative delves into the complexities of diagnosing these conditions early on and explores the challenges inherent in devising effective treatment strategies.</p> </abstract><trans-abstract xml:lang="ru"><p>Заболевания слизистой оболочки полости рта являются актуальной проблемой дерматовенерологии и стоматологии. Это обусловлено трудностями диагностики на начальном этапе, полиморфизмом клинических проявлений, а также недостаточной информированностью медицинских работников. К числу заболеваний слизистой оболочки полости рта, характеризующихся хроническим течением с частыми обострениями и значительно снижающими работоспособность и качество жизни пациентов, относятся красный плоский лишай, простой герпес, многоформная экссудативная эритема и вульгарная пузырчатка. На состояние слизистой оболочки полости рта оказывают влияние значительное количество эндогенных и экзогенных факторов. К эндогенным факторам относятся генетическая предрасположенность, эндокринные расстройства, нарушение углеводного обмена, нейрогенные заболевания, аутоиммунные и инфекционные заболевания. Экзогенные факторы включают приём лекарственных препаратов (нестероидные противовоспалительные средства, антибиотики), гальванизм, чрезмерное потребление алкоголя и наркотических веществ.</p> <p>Авторы статьи, основываясь на клинической практике, представленной на кафедре кожных и венерических болезней имени В.А. Рахманова, приводят случаи дифференциальной диагностики у пациентов с поражением слизистой оболочки полости рта. Кейс-серии рассматриваемых пациентов часто оказывались разнообразными и не всегда соответствовали клинико-диагностическим изменениям слизистой оболочки полости рта.</p></trans-abstract><kwd-group xml:lang="en"><kwd>oral lichen planus</kwd><kwd>pemphigus vulgaris of the oral mucosa</kwd><kwd>herpes simplex</kwd><kwd>erythema multiforme exudative</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>красный плоский лишай слизистой оболочки полости рта</kwd><kwd>вульгарная пузырчатка слизистой оболочки полости рта</kwd><kwd>простой герпес</kwd><kwd>многоформная экссудативная эритема</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">Gupta S, Jawanda M. Oral lichen planus: An update on etiology, pathogenesis, clinical presentation, diagnosis and management. 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