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  <front>
    <journal-meta>
      <journal-id journal-id-type="issn">2226-5988</journal-id>
      <journal-id journal-id-type="eissn">2686-6749</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Клиническая и экспериментальная морфология</journal-title>
        <journal-title xml:lang="en">Clinical and Experimental Morphology</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name>ООО "Группа МДВ"</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.31088/cem2026.15.3.65-72</article-id>
      <title-group>
        <article-title xml:lang="ru">Трудности диагностики AL-λ-амилоидоза тонкой кишки, симулирующего кишечную непроходимость</article-title>
        <trans-title-group xml:lang="en">
          <trans-title>Diagnostic challenges of AL-λ amyloidosis of the small intestine simulating intestinal obstruction</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Тебенькова</surname>
            <given-names>Анна Андреевна</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Тебенькова</surname>
              <given-names>Анна Андреевна</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Tebenkova</surname>
              <given-names>A.A.</given-names>
            </name>
          </name-alternatives>
          <email>tebenkova.ann@yandex.ru</email>
          <contrib-id contrib-id-type="orcid">0009-0009-4588-1538</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Гиоева</surname>
            <given-names>Зарина Владиславовна</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Гиоева</surname>
              <given-names>Зарина Владиславовна</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Gioeva</surname>
              <given-names>Z.V.</given-names>
            </name>
          </name-alternatives>
          <contrib-id contrib-id-type="orcid">0000-0002-5456-8692</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Селезнев</surname>
            <given-names>Денис Евгеньевич</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Селезнев</surname>
              <given-names>Денис Евгеньевич</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Seleznev</surname>
              <given-names>D.E.</given-names>
            </name>
          </name-alternatives>
          <contrib-id contrib-id-type="orcid">0000-0002-3269-089X</contrib-id>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Михалев</surname>
            <given-names>Александр Иванович</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Михалев</surname>
              <given-names>Александр Иванович</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Mikhalev</surname>
              <given-names>A.I.</given-names>
            </name>
          </name-alternatives>
          <contrib-id contrib-id-type="orcid">0000-0002-9463-8229</contrib-id>
          <xref ref-type="aff" rid="aff3"/>
        </contrib>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Бирюков</surname>
            <given-names>Андрей Евгеньевич</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Бирюков</surname>
              <given-names>Андрей Евгеньевич</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Birukov</surname>
              <given-names>A.E.</given-names>
            </name>
          </name-alternatives>
          <contrib-id contrib-id-type="orcid">0000-0001-9700-3352</contrib-id>
          <xref ref-type="aff" rid="aff4"/>
        </contrib>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Долгов</surname>
            <given-names>Евгений Денисович</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Долгов</surname>
              <given-names>Евгений Денисович</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Dolgov</surname>
              <given-names>E.D.</given-names>
            </name>
          </name-alternatives>
          <contrib-id contrib-id-type="orcid">0000-0001-6709-5209</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Конюкова</surname>
            <given-names>Александра Константиновна</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Конюкова</surname>
              <given-names>Александра Константиновна</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Konyukova</surname>
              <given-names>A.K.</given-names>
            </name>
          </name-alternatives>
          <contrib-id contrib-id-type="orcid">0000-0001-5925-5196</contrib-id>
          <xref ref-type="aff" rid="aff4"/>
        </contrib>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Михалева</surname>
            <given-names>Людмила Михайловна</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Михалева</surname>
              <given-names>Людмила Михайловна</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Mikhaleva</surname>
              <given-names>L.M.</given-names>
            </name>
          </name-alternatives>
          <contrib-id contrib-id-type="orcid">0000-0003-2052-914X</contrib-id>
          <xref ref-type="aff" rid="aff4"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Научно-исследовательский институт морфологии человека имени академика А.П. Авцына ФГБНУ «Российский научный центр хирургии имени академика Б.В. Петровского» (Москва, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Avtsyn Research Institute of Human Morphology of FSBSI Petrovsky National Research Centre of Surgery, Moscow, Russia (Moscow, Russia)</institution>
          </aff>
        </aff-alternatives>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">АО «Клиника К+31» (Москва, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">JSC “K+31” Clinic, Moscow, Russia (Moscow, Russia)</institution>
          </aff>
        </aff-alternatives>
        <aff-alternatives id="aff3">
          <aff>
            <institution xml:lang="ru">ФГАОУ ВО Российский национальный исследовательский медицинский университет имени Н.И. Пирогова Минздрава России; ГБУЗ Городская клиническая больница № 31 имени академика Г.М. Савельевой Департамента здравоохранения города Москвы (Москва, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Pirogov Russian National Research Medical University, Moscow, Russia; Savelyeva City Clinical Hospital No. 31, Moscow, Russia (Moscow, Russia)</institution>
          </aff>
        </aff-alternatives>
        <aff-alternatives id="aff4">
          <aff>
            <institution xml:lang="ru">Научно-исследовательский институт морфологии человека имени академика А.П. Авцына ФГБНУ «Российский научный центр хирургии имени академика Б.В. Петровского»; ГБУЗ Городская клиническая больница № 31 имени академика Г.М. Савельевой Департамента здравоохранения города Москвы (Москва, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Avtsyn Research Institute of Human Morphology of FSBSI Petrovsky National Research Centre of Surgery, Moscow, Russia; Savelyeva City Clinical Hospital No. 31, Moscow, Russia (Moscow, Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2026-06-30">
        <day>30</day>
        <month>06</month>
        <year>2026</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2026</year>
      </pub-date>
      <volume>15</volume>
      <issue>3</issue>
      <fpage>65</fpage>
      <lpage>72</lpage>
      <history>
        <date date-type="received" iso-8601-date="2026-03-25">
          <day>25</day>
          <month>03</month>
          <year>2026</year>
        </date>
        <date date-type="accepted" iso-8601-date="2026-05-14">
          <day>14</day>
          <month>05</month>
          <year>2026</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2026-04-06">
          <day>06</day>
          <month>04</month>
          <year>2026</year>
        </date>
      </history>
      <permissions>
        <copyright-year>2026</copyright-year>
        <copyright-holder xml:lang="ru">Коллектив авторов</copyright-holder>
        <license xlink:href="https://creativecommons.org/licenses/by-nc/4.0/">
          <license-p>CC BY-NC 4.0</license-p>
        </license>
      </permissions>
      <abstract xml:lang="ru">
        <p>Представлен редкий клинический случай дебюта AL-λ-амилоидоза с поражением тонкой кишки у пациента 59 лет. В течение двух лет болезнь проявлялась исключительно гастроинтестинальными симптомами (диспепсия, абдоминальный дискомфорт, потеря 20 кг веса). Диагностический поиск, включавший эндоскопические методы, выявил лишь неспецифические изменения. Ключевое значение для верификации диагноза имела энтероскопия с прицельной биопсией из язвенных дефектов тонкой кишки. Патоморфологическое исследование (окрашивание конго красным с поляризационной микроскопией и иммуногистохимическое типирование) подтвердило первичный AL-λ-амилоидоз. Наблюдение демонстрирует необходимость включения амилоидоза в дифференциальный ряд при необъяснимых желудочно-кишечных расстройствах, сопровождающихся похудением и явлениями псевдообструкции. Междисциплинарный подход и современные методы морфологической диагностики являются решающими для своевременного распознавания болезни.</p>
      </abstract>
      <trans-abstract xml:lang="en">
        <p>This paper presents a rare clinical case of AL-λ amyloidosis involving the small intestine in a 59-year-old patient. For two years, the patient experienced only gastrointestinal symptoms, which included dyspepsia, abdominal discomfort, and weight loss of 20 kg. Endoscopy revealed only nonspecific changes. Enteroscopy with targeted biopsy of ulcerative defects in the small intestine was crucial for diagnosis verification. Pathomorphological examination (Congo red staining with polarization microscopy and immunohistochemical typing) confirmed primary AL-λ amyloidosis. This case demonstrates the necessity of including amyloidosis in the differential diagnosis for unexplained gastrointestinal disorders accompanied by weight loss and symptoms simulating intestinal pseudo-obstruction. A multidisciplinary approach and modern methods of morphological diagnosis are crucial for timely disease detection.&#13;
Keywords: amyloidosis, AL-λ amyloidosis, small intestine, enteroscopy, biopsy, immunohistochemistry</p>
      </trans-abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>амилоидоз</kwd>
        <kwd>AL-λ-амилоидоз</kwd>
        <kwd>тонкая кишка</kwd>
        <kwd>энтероскопия</kwd>
        <kwd>биопсия</kwd>
        <kwd>иммуногистохимия</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>amyloidosis</kwd>
        <kwd>AL-λ amyloidosis</kwd>
        <kwd>small intestine</kwd>
        <kwd>enteroscopy</kwd>
        <kwd>biopsy</kwd>
        <kwd>immunohistochemistry</kwd>
      </kwd-group>
      <funding-group>
        <funding-statement xml:lang="ru">Исследование выполнено в рамках государственного задания НИИ морфологии человека им. акад. А.П. Авцына ФГБНУ «РНЦХ им. акад. Б.В. Петровского» № 1025031800111-3-3.1.9 (№ FURG-2026-0030).</funding-statement>
        <funding-statement xml:lang="en">The study was carried out within the framework of State Assignment to Avtsyn Research Institute of Human Morphology of FSBSI "Petrovsky National Research Centre of Surgery" No. 1025031800111-3-3.1.9 (No. FURG-2026-0030).</funding-statement>
      </funding-group>
    </article-meta>
  </front>
  <body/>
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</article>
