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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">problendo</journal-id><journal-title-group><journal-title xml:lang="ru">Проблемы Эндокринологии</journal-title><trans-title-group xml:lang="en"><trans-title>Problems of Endocrinology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0375-9660</issn><issn pub-type="epub">2308-1430</issn><publisher><publisher-name>Endocrinology Research Centre</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14341/probl201056444-51</article-id><article-id custom-type="elpub" pub-id-type="custom">problendo-4735</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>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>Циклический синдром Кушинга</article-title><trans-title-group xml:lang="en"><trans-title>Cyclic Cushing's syndrome</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Marova</surname><given-names>E I</given-names></name></name-alternatives><email xlink:type="simple">-</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Voronkova</surname><given-names>I A</given-names></name></name-alternatives><email xlink:type="simple">Iya-v@yandex.ru</email></contrib></contrib-group><pub-date pub-type="collection"><year>2010</year></pub-date><pub-date pub-type="epub"><day>15</day><month>08</month><year>2010</year></pub-date><volume>56</volume><issue>4</issue><issue-title>ТОМ 56, №4 (2010)</issue-title><fpage>44</fpage><lpage>51</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Marova E.I., Voronkova I.A., 2010</copyright-statement><copyright-year>2010</copyright-year><copyright-holder xml:lang="ru">Marova E.I., Voronkova I.A.</copyright-holder><copyright-holder xml:lang="en">Marova E.I., Voronkova I.A.</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.probl-endojournals.ru/jour/article/view/4735">https://www.probl-endojournals.ru/jour/article/view/4735</self-uri><abstract><p>Cиндром циклический Кушинга - редкое заболевание, которое характеризуется неоднократными эпизодами повышения уровня кортизола, чередующимися с периодами нормальной его секреции. Так называемые циклы гиперкортицизма могут происходить регулярно или эпизодически с межциклическими промежутками, продолжительностью от нескольких дней до нескольких лет. Большинство исследователей считают, что для того чтобы достоверно установить диагноз циклического синдрома Кушинга, должны быть лабораторно определены 3 пика и 2 спада секреции кортизола. Циклический синдром Кушинга может быть как АКТГ-зависимым, так и АКТГ-независимым. Обзор 65 зарегистрированных случаев свидетельствует о том, что причиной циклического синдрома Кушинга в 54% случаев является кортикотропинома гипофиза, в 26% - АКТГ-эктопическая опухоль и примерно в 11% - опухоль надпочечников, в 9% случаев причина не выяснена. Патофизиология циклического синдрома Кушинга плохо изучена. Однако в ряде случаев при двусторонней крупноузелковой гиперплазии надпочечников или кортикостероме надпочечника циклический синдром Кушинга патофизиологически обусловлен эктопическими или аномально экспрессированными рецепторами. У большинства пациентов с циклическим синдромом Кушинга имеются клинические проявления классического гиперкортицизма, которые могут иметь как циклический, так и постоянный характер. У небольшого числа пациентов с циклическим синдромом Кушинга клинические признаки отсутствуют. Колебания клинической картины и противоречивость данных гормональных тестов делают циклический синдром Кушинга трудно диагностируемым. Поэтому врачи должны знать об этом клиническом синдроме и активно искать его у всех пациентов с подозрением на повышенную продукцию кортизола, но нормальными лабораторными показателями. Частые измерения концентрации свободного кортизола в моче или слюне - надежное и удобное средство диагностики при подозрении на циклический синдром Кушинга. Тесты стимулирования или подавления кортизола могут дать ложные результаты из-за спонтанного падения или подъема уровня кортизола в сыворотке крови во время тестирования. Если циклический синдром Кушинга лабораторно подтвержден, дальнейший диагностический поиск должен быть направлен на выявление причины данного заболевания. Средняя продолжительность жизни больных с циклическим синдромом Кушинга неизвестна.</p></abstract><trans-abstract xml:lang="en"><p>The cyclic Cushing's syndrome is a rare disease characterized by multiple episodes of elevated cortisol levels alternating with periods of its normal secretion. The so-called hypercorticism cycles may be either regular or episodic with intercycle intervals as long as a few days to several years. Most researchers agree that the reliable diagnosis of cyclic Cushing's syndrome should be based on laboratory detection of 3 peaks and 2 falls of plasma cortisol level. Cyclic Cushing's syndrome may be either ACTH dependent or independent. A review of 65 verified cases indicates that this condition may be caused by pituitary corticotropinoma (54%), ectopic ACTH-producing tumour (26%), and adrenal tumour (roughly 11%). The cause of the disease remains uncertain in 9% of the patients. Pathophysiological mechanisms of cyclic Cushing's syndrome are poorly known. In certain cases of bilateral macronodular adrenal hyperplasia or adrenal corticosteroma, it may be associated with the presence of ectopic receptors or anomalous expression of normally located receptors. The majority of the patients presenting with cyclic Cushing's syndrome exhibit symptoms of classical hypercorticism that manifest themselves either on a permanent or cyclic basis. In a small number of patients, clinical signs of cyclic Cushing's syndrome are virtually absent. Variations of the clinical picture and conflicting results of hormonal assays taken together make cyclic Cushing's syndrome difficult to diagnose. Therefore, physicians must be aware of this condition and actively search for it in all patients believed to have an enhanced cortisol production despite normal results of laboratory analysis. Frequent changes of urinary or salivary free cortisol levels are reliable and convenient criteria for cyclic Cushing's syndrome in patients suspected to have this condition. Results of cortisol stimulation or suppression tests are likely to lead to a false conclusion due to spontaneous falls and rises in serum cortisol levels at the time of analysis. Given laboratory confirmation of cyclic Cushing's syndrome, subsequent studies should be focused on the elucidation of its cause. The average life expectancy of patients with cyclic Cushing's syndrome remains to be determined.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>циклический синдром Кушинга</kwd><kwd>гиперкортицизм</kwd><kwd>гиперсекреция</kwd><kwd>кортизол</kwd><kwd>АКТГ</kwd><kwd>цикличность</kwd><kwd>периодичность</kwd><kwd>пики и спады секреции</kwd><kwd>нерегулярная секреция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cyclic Cushing's syndrome hypercorticism</kwd><kwd>hypersecretion</kwd><kwd>cortisol</kwd><kwd>ACTH</kwd><kwd>cyclicity</kwd><kwd>periodicity</kwd><kwd>secretory peaks and falls</kwd><kwd>irregular secretion</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">Atkinson A.B. Optimum Strategy for Managing Cyclic Cushing's disease. 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