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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">clinendo</journal-id><journal-title-group><journal-title xml:lang="ru">Клиническая эндоскопия</journal-title><trans-title-group xml:lang="en"><trans-title>Filin’s Clinical endoscopy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2415-7813</issn><publisher><publisher-name>"Global Media technology" Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31146/2415-7813-endo-68-1-31-40</article-id><article-id custom-type="elpub" pub-id-type="custom">clinendo-690</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КОЛОПРОКТОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>COLOPROCTOLOGY</subject></subj-group></article-categories><title-group><article-title>Сравнительная оценка слизистой оболочки индексных сегментов толстой кишки при колоректальном раке</article-title><trans-title-group xml:lang="en"><trans-title>Comparative assessment of the mucosa of index segments of the colon in colorectal cancer</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6286-8193</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Короткевич</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Korotkevich</surname><given-names>A. G.</given-names></name></name-alternatives><email xlink:type="simple">alkorot@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9401-5737</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Титов</surname><given-names>С. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Titov</surname><given-names>S. E.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7871-3885</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жилина</surname><given-names>Н. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhilina</surname><given-names>N. M.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9433-8341</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Деменков</surname><given-names>П. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Demenkov</surname><given-names>P. S.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5821-3100</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бондарев</surname><given-names>О. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Bondarev</surname><given-names>O. I.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3799-9407</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Веряскина</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Veryaskina</surname><given-names>Yu. A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4522-4174</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маринич</surname><given-names>Я. Я.</given-names></name><name name-style="western" xml:lang="en"><surname>Marinich</surname><given-names>Ya. Ya.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-6"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Новокузнецкий государственный институт усовершенствования врачей - филиал федерального государственного бюджетного образовательного учреждения дополнительного профессионального образования «Российская медицинская академия непрерывного профессионального образования»; Новокузнецкая городская клиническая больница им. А.А. Луцика</institution></aff><aff xml:lang="en"><institution>Novokuznetsk State Institute for Advanced Training of Doctors - branch of “Russian Medical Academy of Continuing Professional Education”; Novokuznetsk City Clinical Hospital named after A.A. Lutsik</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Новосибирский национальный исследовательский государственный университет; ФГБУН «Институт молекулярной и клеточной биологии» СО РАН; АО «Вектор-Бест»</institution></aff><aff xml:lang="en"><institution>Novosibirsk National Research State University; Institute of Molecular and Cell Biology SB RAS; AO “Vector-Best”, Research and Production area</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Новокузнецкий государственный институт усовершенствования врачей - филиал федерального государственного бюджетного образовательного учреждения дополнительного профессионального образования «Российская медицинская академия непрерывного профессионального образования»</institution></aff><aff xml:lang="en"><institution>Novokuznetsk State Institute for Advanced Training of Doctors - branch of “Russian Medical Academy of Continuing Professional Education”</institution></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Новосибирский национальный исследовательский государственный университет; Институт цитологии и генетики СО РАН</institution></aff><aff xml:lang="en"><institution>Novosibirsk National Research State University; Institute of Cytology and Genetics SB RAS</institution></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>Институт цитологии и генетики СО РАН; ФГБУН «Институт молекулярной и клеточной биологии» СО РАН</institution></aff><aff xml:lang="en"><institution>Institute of Cytology and Genetics SB RAS; Institute of Molecular and Cell Biology SB RAS</institution></aff></aff-alternatives><aff-alternatives id="aff-6"><aff xml:lang="ru"><institution>Новокузнецкая городская клиническая больница № 1 им. Г.П. Курбатова</institution></aff><aff xml:lang="en"><institution>Novokuznetsk City Clinical Hospital No. 1 named after G.P. Kurbatov</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>22</day><month>04</month><year>2026</year></pub-date><volume>68</volume><issue>1</issue><fpage>31</fpage><lpage>40</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Короткевич А.Г., Титов С.Е., Жилина Н.М., Деменков П.С., Бондарев О.И., Веряскина Ю.А., Маринич Я.Я., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Короткевич А.Г., Титов С.Е., Жилина Н.М., Деменков П.С., Бондарев О.И., Веряскина Ю.А., Маринич Я.Я.</copyright-holder><copyright-holder xml:lang="en">Korotkevich A.G., Titov S.E., Zhilina N.M., Demenkov P.S., Bondarev O.I., Veryaskina Y.A., Marinich Y.Y.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://clinendo.elpub.ru/jour/article/view/690">https://clinendo.elpub.ru/jour/article/view/690</self-uri><abstract><p>Целью исследования было сравнение частоты колоректального рака (КРР) между сегментами толстой кишки и молекулярно-генетических характеристик слизистой оболочки индексных сегментов толстой кишки. Материалы и методы: Сплошное ретроспективное исследование результатов 7185 колоноскопий. Проспективное исследование (2022-2023 гг.) слизистой оболочки толстой кишки выполнено у 152 пациентов с КРР. Результаты: оценка частоты КРР по сегментам толстой кишки от всех выявленных КРР показала преобладающее место сигмовидной и прямой кишки, что соответствует известным сведениям. Однако, анализ частоты КРР среди всех новообразований в конкретном сегменте толстой кишки выявил преобладающее место слепой кишки, сигмовидной и прямой кишки. Оценка различий этих показателей выявила не ожидаемые несоответствия для слепой, восходящей и нисходящей кишок. Морфометрия слизистой оболочки выявила нарастание отличия параметров измерения от восходящей к сигмовидной кишке. Молекулярно-генетические характеристики индексных сегментов по части изученных показателей имели значимые различия как между сегментами толстой кишки, так и ее половинами. Однако, среди сегментов толстой кишки присутствовала разнородность показателей, не соответствующая совокупной оценке половин толстой кишки. Заключение: при КРР существует морфологическая и генетическая разнородность слизистой оболочки между разными сегментами толстой кишки, не соответствующая различиям по частоте КРР между правой и левой половинами толстой кишки. Выявленные отличия крайних отделов толстой кишки против сегментов ободочной кишки требуют дополнительной оценки.</p></abstract><trans-abstract xml:lang="en"><p>The aim of the study was to compare the incidence of colorectal cancer between colon segments and the molecular genetic characteristics of the mucosa of index colon segments. Materials and methods: A comprehensive retrospective study of 7,185 colonoscopies was conducted. A prospective study (2022-2023) of the colonic mucosa was performed in 152 patients with CRC. Results: An assessment of the CRC frequency by colon segment from all detected CRC cases revealed a predominance of the sigmoid and rectum, consistent with existing data. However, an analysis of the CRC frequency among all neoplasms in a specific colon segment revealed a predominance of the cecum, sigmoid, and rectum. An assessment of the differences in these indicators revealed unexpected discrepancies for the cecum, ascending colon, and descending colon. Mucosal morphometry revealed increasing differences in measurement parameters from the ascending colon to the sigmoid colon. Molecular genetic characteristics of the index segments for some of the studied parameters showed significant differences both between colon segments and between colon halves. However, among colon segments, there was heterogeneity in parameters that was inconsistent with the combined assessment of the colon halves. Conclusion: In colorectal cancer, there is morphological and genetic heterogeneity in the mucosa between different segments of the colon, which is not consistent with the differences in CRC incidence between the right and left halves of the colon. The identified differences between the outer colon and the colonic segments require further evaluation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>колоректальный рак</kwd><kwd>толстая кишка</kwd><kwd>слизистая оболочка</kwd><kwd>молекулярногенетические характеристики</kwd><kwd>морфометрия слизистой оболочки</kwd></kwd-group><kwd-group xml:lang="en"><kwd>colorectal cancer</kwd><kwd>colon</kwd><kwd>mucosa</kwd><kwd>molecular genetic characteristics</kwd><kwd>mucosal morphometry</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">PDQ Screening and Prevention Editorial Board. 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