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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 Oncology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Oncology</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский онкологический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1028-9984</issn><issn publication-format="electronic">2412-9119</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">624319</article-id><article-id pub-id-type="doi">10.17816/onco624319</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>Клинические случаи</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">Merkel cell carcinoma with adrenal metastasis: a clinical case</article-title><trans-title-group xml:lang="ru"><trans-title>Карцинома Меркеля с вторичным поражением надпочечников: описание клинического случая</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7840-4174</contrib-id><contrib-id contrib-id-type="scopus">57195152806</contrib-id><contrib-id contrib-id-type="researcherid">AHD-5099-2022</contrib-id><contrib-id contrib-id-type="spin">6284-9008</contrib-id><name-alternatives><name xml:lang="en"><surname>Rebrova</surname><given-names>Dina V.</given-names></name><name xml:lang="ru"><surname>Реброва</surname><given-names>Дина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>endocrinology@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2632-5415</contrib-id><name-alternatives><name xml:lang="en"><surname>Malyshenko</surname><given-names>Yuliya A.</given-names></name><name xml:lang="ru"><surname>Малышенко</surname><given-names>Юлия Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>doctor-yula85@mail.ru</email><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2846-4056</contrib-id><contrib-id contrib-id-type="spin">9740-6360</contrib-id><name-alternatives><name xml:lang="en"><surname>Savelyeva</surname><given-names>Tatyana V.</given-names></name><name xml:lang="ru"><surname>Савельева</surname><given-names>Татьяна Вячеславовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>taleon76@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4396-6043</contrib-id><name-alternatives><name xml:lang="en"><surname>Rudyuk</surname><given-names>Liudmila A.</given-names></name><name xml:lang="ru"><surname>Рудюк</surname><given-names>Людмила Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>kokb.rudyukla@infomed39.ru</email><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5066-1865</contrib-id><contrib-id contrib-id-type="spin">6003-4940</contrib-id><name-alternatives><name xml:lang="en"><surname>Mityukov</surname><given-names>Аleksandr Е.</given-names></name><name xml:lang="ru"><surname>Митюков</surname><given-names>Александр Евгеньевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>doctor-alex@inbox.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-2867-6840</contrib-id><name-alternatives><name xml:lang="en"><surname>Ivonina</surname><given-names>Еkaterina S.</given-names></name><name xml:lang="ru"><surname>Ивонина</surname><given-names>Екатерина Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><email>kativo21@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9573-6111</contrib-id><name-alternatives><name xml:lang="en"><surname>Soroko</surname><given-names>Irina V.</given-names></name><name xml:lang="ru"><surname>Сороко</surname><given-names>Ирина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>irinavsoroko@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3001-664X</contrib-id><contrib-id contrib-id-type="scopus">57190294900</contrib-id><contrib-id contrib-id-type="researcherid">AAZ-1549-2021</contrib-id><contrib-id contrib-id-type="spin">7093-1088</contrib-id><name-alternatives><name xml:lang="en"><surname>Chernikov</surname><given-names>Roman A.</given-names></name><name xml:lang="ru"><surname>Черников</surname><given-names>Роман Анатольевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>д-р мед. наук</p></bio><email>yaddd@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1903-5081</contrib-id><contrib-id contrib-id-type="scopus">57216017997</contrib-id><contrib-id contrib-id-type="researcherid">F-1670-2019</contrib-id><contrib-id contrib-id-type="spin">2481-4331</contrib-id><name-alternatives><name xml:lang="en"><surname>Sleptsov</surname><given-names>Ilya V.</given-names></name><name xml:lang="ru"><surname>Слепцов</surname><given-names>Илья Валерьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>д-р мед. наук</p></bio><email>newsurgery@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9574-105X</contrib-id><contrib-id contrib-id-type="spin">4062-6409</contrib-id><name-alternatives><name xml:lang="en"><surname>Vorokhobina</surname><given-names>Natalya V.</given-names></name><name xml:lang="ru"><surname>Ворохобина</surname><given-names>Наталья Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><email>natvorokh@mail.ru</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Saint Petersburg State University</institution></aff><aff><institution xml:lang="ru">Санкт-Петербургский государственный университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Immanuel Kant Baltic Federal University</institution></aff><aff><institution xml:lang="ru">Балтийский федеральный университет имени Иммануила Канта</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Regional Clinical Hospital of the Kaliningrad Region</institution></aff><aff><institution xml:lang="ru">Областная клиническая больница Калининградской области</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">North-Western State Medical University named after I.I. Mechnikov</institution></aff><aff><institution xml:lang="ru">Северо-Западный государственный медицинский университет имени И.И. Мечникова</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-07-02" publication-format="electronic"><day>02</day><month>07</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2023-12-23" publication-format="electronic"><day>23</day><month>12</month><year>2023</year></pub-date><volume>28</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>145</fpage><lpage>154</lpage><history><date date-type="received" iso-8601-date="2023-12-07"><day>07</day><month>12</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2024-02-16"><day>16</day><month>02</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="2027-07-10"/><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://rjonco.com/1028-9984/article/view/624319">https://rjonco.com/1028-9984/article/view/624319</self-uri><abstract xml:lang="en"><p>Merkel cell carcinoma is a rare primary malignant skin tumor with epithelial and neuroendocrine differentiation, which is usually characterized by an aggressive course with frequent local recurrence and a high metastatic potential. This article presents a clinical case of diagnosing Merkel cell carcinoma with secondary lesions of the adrenal glands, which is a rare localization of distant metastasis of this tumor with a low survival prognosis. Merkel cell carcinoma is difficult to diagnose due to its rare occurrence and can be mistaken for another dermatological disease. The patient's medical history was analyzed, starting from the outpatient stage of medical care until hospitalization for diagnostic surgery. The article is valuable for doctors of any specialty due to the difficulties in differential diagnosis of adrenal incidentalomas.</p></abstract><trans-abstract xml:lang="ru"><p>Карцинома Меркеля — это редкая первичная злокачественная опухоль кожи с эпителиальной и нейроэндокринной дифференцировкой, которая как правило характеризуется агрессивным течением с частым местным рецидивированием и высоким потенциалом метастазирования. В данной статье представлен клинический случай диагностики карциномы Меркеля с вторичным поражением надпочечников, которое является редкой локализацией отдалённого метастазирования данной опухоли с низким прогнозом выживаемости. Карциному Меркеля трудно диагностировать ввиду редкой встречаемости и можно принять за другое дерматологическое заболевание. Проведён разбор истории болезни пациента, начиная с амбулаторного этапа оказания медицинской помощи до момента госпитализации в стационар для проведения хирургической диагностической операции. Статья представляет ценность для врачей любой специальности, поскольку сделан акцент на инструментальных и лабораторных методах исследования в дифференциальной диагностике новообразований надпочечников.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Merkel cell carcinoma</kwd><kwd>neuroendocrine tumor</kwd><kwd>neuroendocrine cancer</kwd><kwd>skin cancer</kwd><kwd>case report</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>карцинома Меркеля</kwd><kwd>нейроэндокринная опухоль</kwd><kwd>нейроэндокринный рак</kwd><kwd>рак кожи</kwd><kwd>клинический случай</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">Merkel cell carcinoma. Clinical guidelines. ID 297. Approved by the Scientific and Practical Council of the Ministry of Health of the Russian Federation. 2019. 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