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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 Forensic Medicine</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Forensic Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Судебная медицина</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2411-8729</issn><issn publication-format="electronic">2409-4161</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">401</article-id><article-id pub-id-type="doi">10.17816/fm401</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>Экспертная практика</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="zh"><subject>临床病例报告</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">Possibility of determining injury duration based on changes in histomorphometric characteristics of the thymus</article-title><trans-title-group xml:lang="ru"><trans-title>О возможности определения давности повреждений на основании изменения гистоморфометрических характеристик тимуса в эксперименте</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1045-5677</contrib-id><contrib-id contrib-id-type="spin">1895-7300</contrib-id><name-alternatives><name xml:lang="en"><surname>Khalikov</surname><given-names>Airat A.</given-names></name><name xml:lang="ru"><surname>Халиков</surname><given-names>Айрат Анварович</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.м.н., профессор</p></bio><email>airat.expert@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7571-0312</contrib-id><contrib-id contrib-id-type="spin">6412-0687</contrib-id><name-alternatives><name xml:lang="en"><surname>Kildyushov</surname><given-names>Evgeny M.</given-names></name><name xml:lang="ru"><surname>Кильдюшов</surname><given-names>Евгений Михайлович</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.м.н., профессор</p></bio><email>kem1967@bk.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2405-1801</contrib-id><name-alternatives><name xml:lang="en"><surname>Kuznetsov</surname><given-names>Kirill O.</given-names></name><name xml:lang="ru"><surname>Кузнецов</surname><given-names>Кирилл Олегович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Student</p></bio><bio xml:lang="ru"><p>студент 6-го курса</p></bio><email>kirillkuznetsov@aol.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4180-5326</contrib-id><name-alternatives><name xml:lang="en"><surname>Komlev</surname><given-names>Dmitry S.</given-names></name><name xml:lang="ru"><surname>Комлев</surname><given-names>Дмитрий Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>expert</p></bio><bio xml:lang="ru"><p>эксперт</p></bio><email>komlevds@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9509-5978</contrib-id><name-alternatives><name xml:lang="en"><surname>Rahmatullina</surname><given-names>Gulnaz R.</given-names></name><name xml:lang="ru"><surname>Рахматуллина</surname><given-names>Гульназ Рифовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>expert</p></bio><bio xml:lang="ru"><p>эксперт</p></bio><email>rgulnaz779@gmail.ru</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Bashkir State Medical University</institution></aff><aff><institution xml:lang="ru">Башкирский государственный медицинский университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">N.I. Pirogov Russian National Research Medical University</institution></aff><aff><institution xml:lang="ru">Российский национальный исследовательский медицинский университет имени Н.И. Пирогова</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Volga-Ural Bureau of Forensic Medicine</institution></aff><aff><institution xml:lang="ru">Приволжско-Уральское бюро судебно-медицинской экспертизы</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2021-06-11" publication-format="electronic"><day>11</day><month>06</month><year>2021</year></pub-date><pub-date date-type="pub" iso-8601-date="2021-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2021</year></pub-date><volume>7</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>96</fpage><lpage>100</lpage><history><date date-type="received" iso-8601-date="2021-05-19"><day>19</day><month>05</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-05-31"><day>31</day><month>05</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Khalikov A.A., Kildyushov E.M., Kuznetsov K.O., Komlev D.S., Rahmatullina G.R.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Халиков А.А., Кильдюшов Е.М., Кузнецов К.О., Комлев Д.С., Рахматуллина Г.Р.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Khalikov A.A., Kildyushov E.M., Kuznetsov K.O., Komlev D.S., Rahmatullina G.R.</copyright-holder><copyright-holder xml:lang="ru">Халиков А.А., Кильдюшов Е.М., Кузнецов К.О., Комлев Д.С., Рахматуллина Г.Р.</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/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://for-medex.ru/jour/article/view/401">https://for-medex.ru/jour/article/view/401</self-uri><abstract xml:lang="en"><p><bold><italic>Background:</italic></bold><italic> Lymphoid tissue is the first to react to stress, which manifests as characteristic morphological manifestations, based on which it is possible to study the duration of damage. <bold>Aims:</bold> Study of the dynamics of changes in the histomorphometric characteristics of the rat thymus during regeneration of the musculocutaneous tissue during mechanical thigh trauma. <bold>Material and methods:</bold> In total, 84 sexually mature rats were enrolled. These were divided into two groups (experiment and control), which were further classified into four subgroups depending on the time elapsed since the injury (1, 3, 15, and 25 days). Mechanical damage was simulated using a setup that transferred kinetic energy (comparable to a 5.6-mm rifle bullet) to tissues. Subsequently, the animals were removed from the experiment by decapitation; their thymus was removed and microscopically examined. In arbitrary units, the total area of the lobules as well as the area of the cortical and cerebral zones was determined. <bold>Results:</bold> Our research results indicate different phases of changes in the histomorphometric characteristics of the thymus, which correspond to the course of the wound and can be used in forensic practice to determine the duration of the injury. <bold>Conclusions:</bold> Mechanical trauma, considered as a stress reaction, causes involutive changes in the thymus and is characterized by changes in the area of the thymus cortex and medulla as well as regular dynamics of changes in the thymic lobules at different stages of wound regeneration.</italic></p></abstract><trans-abstract xml:lang="ru"><p><bold><italic>Актуальность.</italic></bold><italic> Известно, что лимфоидная ткань первой реагирует на стресс, что проявляется характерными морфологическими изменениями, на основании которых возможно изучить давность образования повреждения. <bold>Цель исследования</bold> — изучить в эксперименте динамику изменения гистоморфометрических характеристик тимуса крысы в процессе регенерации кожно-мышечной ткани при механической травме бедра. <bold>Материал и методы.</bold> Исследованы 2 группы (опыт и контроль) половозрелых крыс (n=84), которых разделили на 4 подгруппы в зависимости от времени, прошедшего с момента травмы (1; 3; 15 и 25-е сут). Механическое повреждение моделировали с помощью установки, которая передавала кинетическую энергию тканям, сопоставимую с энергией пули винтовки калибра 5,6 мм. Животных выводили из опыта путем декапитации, извлекали тимус и подвергали его микроскопическому исследованию. В условных единицах определяли общую площадь долек, площадь корковой и мозговой зоны. <bold>Результаты.</bold> Полученные нами результаты исследования свидетельствуют о фазности изменений гистоморфометрической характеристики строения тимуса, которые соответствуют фазам течения раневого процесса, что можно использовать в судебно-медицинской практике с целью определения давности травмы. <bold>Заключение. </bold>Таким образом, механическая травма, рассматриваемая как стресс-реакция, вызывает инволютивные изменения в тимусе, характеризующиеся изменением показателей площади коркового и мозгового вещества тимуса и закономерной динамикой изменения площади долек тимуса на этапах регенерации раны.</italic></p></trans-abstract><kwd-group xml:lang="en"><kwd>mechanical injury</kwd><kwd>thymus</kwd><kwd>determination of the duration of injury</kwd><kwd>mechanical injury</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>механическое повреждение</kwd><kwd>тимус</kwd><kwd>определение давности травмы</kwd><kwd>механическая травма</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">Enikeev DA, Kuznetsov KO, Enikeev OA, et al. 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