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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">gnck</journal-id><journal-title-group><journal-title xml:lang="ru">Колопроктология</journal-title><trans-title-group xml:lang="en"><trans-title>Koloproktologia</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-7556</issn><issn pub-type="epub">2686-7303</issn><publisher><publisher-name>Russian Association of Coloproctology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33878/2073-7556-2020-19-1-107-116</article-id><article-id custom-type="elpub" pub-id-type="custom">gnck-1535</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>КЛИНИЧЕСКИЕ НАБЛЮДЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CASE REPORT</subject></subj-group></article-categories><title-group><article-title>ТРУДНОСТИ ДИАГНОСТИКИ MutYH-АССОЦИИРОВАННОГО ПОЛИПОЗА ТОЛСТОЙ КИШКИ (клинический случай)</article-title><trans-title-group xml:lang="en"><trans-title>DIAGNOSTIC DIFFICULTIES IN MutYH-ASSOCIATED POLYPOSIS (case report)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Цуканов</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsukanov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123423, Москва, ул. Саляма Адиля, д. 2</p></bio><bio xml:lang="en"><p>Salyama Adilya str., 2, Moscow, 123423</p></bio><email xlink:type="simple">tsukanov81@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пикунов</surname><given-names>Д. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Pikunov</surname><given-names>D. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тобоева</surname><given-names>М. Х.</given-names></name><name name-style="western" xml:lang="en"><surname>Toboeva</surname><given-names>M. Kh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузьминов</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuzminov</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Майновская</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Majnovskaya</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кашников</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Kashnikov</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шубин</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Shubin</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «НМИЦ колопроктологии имени А.Н. Рыжих» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ryzhikh National Medical Research Centre for Coloproctology of the Ministry of Health of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБУ «НМИЦ колопроктологии имени А.Н. Рыжих» Минздрава России; ФГБОУ ДПО РМАНПО Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ryzhikh National Medical Research Centre for Coloproctology of the Ministry of Health of Russia; Russian Medical Academy of Continuing Professional Education of the Ministry of Healthcare of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>21</day><month>03</month><year>2020</year></pub-date><volume>19</volume><issue>1</issue><fpage>107</fpage><lpage>116</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Цуканов А.С., Пикунов Д.Ю., Тобоева М.Х., Кузьминов А.М., Майновская О.А., Кашников В.Н., Шубин В.П., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Цуканов А.С., Пикунов Д.Ю., Тобоева М.Х., Кузьминов А.М., Майновская О.А., Кашников В.Н., Шубин В.П.</copyright-holder><copyright-holder xml:lang="en">Tsukanov A.S., Pikunov D.Y., Toboeva M.K., Kuzminov A.M., Majnovskaya O.A., Kashnikov V.N., Shubin V.P.</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://www.ruproctology.com/jour/article/view/1535">https://www.ruproctology.com/jour/article/view/1535</self-uri><abstract><p>MutYH-ассоциированный полипоз – это наследственное заболевание с аутосомно-рецессивным типом наследования, при котором в толстой кишке пациента развиваются десятки, а порой и сотни полипов. Причиной развития синдрома являются биаллельные мутации в гене MutYH. Для окончательной постановки диагноза MutYH-ассоциированного полипоза, при выявлении у больного 2 гетерозиготных мутаций в гене MutYH необходимо подтвердить, что они находятся на разных родительских хромосомах. В данной работе приводятся трудности диагностики MutYH-ассоциированного полипоза, обусловленные невозможностью изучить образцы ДНК родителей, а также описывается процесс решения этой сложной ситуации.</p></abstract><trans-abstract xml:lang="en"><p>MutYH-associated polyposis (MAP) is hereditary syndrome with autosomal recessive inheritance, caused by biallelic mutation in MutYH gene and characterized by presence of multiple (20 and more) polyps in the bowel and increased life-time risk of colorectal cancer. At the same time finding 2 heterozygous mutations in MutYH gene (by Sanger method) doesn`t mean the diagnosis of MAP because of need to confirm their biallelic location. This case-report demonstrates difficulties in diagnostic of MAP caused by inability to investigate parent DNA samples and our options for solution of this problem.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>MutYH-ассоциированный полипоз</kwd><kwd>колоректальный рак</kwd><kwd>биаллельные мутации</kwd></kwd-group><kwd-group xml:lang="en"><kwd>MutYH-associated polyposis</kwd><kwd>colorectal cancer</kwd><kwd>biallelic mutations</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">Syngal S, Brand R, Church J. et al. ACG Clinical Guideline: Genetic Testing and Management of Hereditary Gastrointestinal Cancer Syndromes. American journal of gastroenterology. 2015 Feb;110(2):223-62 doi: 10.1038/ajg.2014.435</mixed-citation><mixed-citation xml:lang="en">Syngal S, Brand R, Church J. et al. 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