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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">Digital Diagnostics</journal-id><journal-title-group><journal-title xml:lang="en">Digital Diagnostics</journal-title><trans-title-group xml:lang="ru"><trans-title>Digital Diagnostics</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>Digital Diagnostics</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2712-8490</issn><issn publication-format="electronic">2712-8962</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">59690</article-id><article-id pub-id-type="doi">10.17816/DD59690</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 и серии клинических случаев</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="zh"><subject>临床病例及临床病例的系列</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">Diagnosis of solitary eosinophilic granuloma by CT, MRI, and 18F-FDG PET/CT: two clinical cases</article-title><trans-title-group xml:lang="ru"><trans-title>Два случая верифицированной солитарной эозинофильной гранулёмы: визуализация методами КТ, МРТ и 18F-ФДГ ПЭТ/КТ</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>2例证实的孤立性嗜酸性肉芽肿 CT、MRI和18F-FDG PET/CT成像</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1072-2202</contrib-id><contrib-id contrib-id-type="spin">4841-3234</contrib-id><name-alternatives><name xml:lang="en"><surname>Gelezhe</surname><given-names>Pavel B.</given-names></name><name xml:lang="ru"><surname>Гележе</surname><given-names>Павел Борисович</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><email>gelezhe.pavel@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7968-6778</contrib-id><contrib-id contrib-id-type="spin">4641-1505</contrib-id><name-alternatives><name xml:lang="en"><surname>Bulanov</surname><given-names>Dmitriy V.</given-names></name><name xml:lang="ru"><surname>Буланов</surname><given-names>Дмитрий Владимирович</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>к.м.н.</p></bio><email>dbulanov@emcmos.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow Center for Diagnostics and Telemedicine</institution></aff><aff><institution xml:lang="ru">Научно-практический клинический центр диагностики и телемедицинских технологий Департамента здравоохранения города Москвы</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Joint-Stock Company “European Medical Center”</institution></aff><aff><institution xml:lang="ru">Акционерное общество «Европейский Медицинский Центр»</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Joint-Stock Company “European Medical Center”</institution></aff><aff><institution xml:lang="ru">Акционерное общество «Европейский Медицинский Центр»</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">The Russian National Research Medical University named after N.I. Pirogov</institution></aff><aff><institution xml:lang="ru">Российский национальный исследовательский медицинский университет имени Н.И. Пирогова</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2021-03-12" publication-format="electronic"><day>12</day><month>03</month><year>2021</year></pub-date><pub-date date-type="pub" iso-8601-date="2021-04-30" publication-format="electronic"><day>30</day><month>04</month><year>2021</year></pub-date><volume>2</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><issue-title xml:lang="zh"/><fpage>75</fpage><lpage>82</lpage><history><date date-type="received" iso-8601-date="2021-01-29"><day>29</day><month>01</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-03-02"><day>02</day><month>03</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Gelezhe P.B., Bulanov D.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Гележе П.Б., Буланов Д.В.</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; 2021, Gelezhe P., Bulanov D.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Gelezhe P.B., Bulanov D.V.</copyright-holder><copyright-holder xml:lang="ru">Гележе П.Б., Буланов Д.В.</copyright-holder><copyright-holder xml:lang="zh">Gelezhe P., Bulanov D.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><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://jdigitaldiagnostics.com/DD/article/view/59690">https://jdigitaldiagnostics.com/DD/article/view/59690</self-uri><abstract xml:lang="en"><p>This paper presents two clinical cases of eosinophilic granuloma of bone diagnosed by CT, MRI, and 18F-FDG PET/CT. In both cases the patients were admitted to the clinic with suspected primary malignant bone tumor and the diagnosis of a solitary eosinophilic granuloma was made based on the results of comprehensive radiological diagnostic examination and histological verification. Solitary eosinophilic granuloma of bone is an infrequent condition, occurring in less than 1% of cases of skeletal tumor masses. The most common eosinophilic granuloma is found in the parietal and frontal bones of the skull and is an osteolytic volumetric mass that gradually increases in size. Although most bone tumors can be detected by radiography, computed tomography is preferred, primarily because of its superior ability to detect cortical bone destruction. The diagnostic accuracy of computed tomography and magnetic resonance imaging may be different. The combined use of radiological and radionuclide methods allows us to narrow the spectrum of differential diagnosis. Unfortunately, relatively low specificity of existing radiological diagnostic studies in most cases does not allow to establish a precise diagnosis, and biopsy with subsequent pathological examination remains the method of choice. These clinical observations demonstrate the need to include eosinophilic granuloma in the differential diagnosis when a solitary osteolytic focus is detected.</p></abstract><trans-abstract xml:lang="ru"><p>В работе представлены два клинических наблюдения эозинофильной гранулёмы кости, диагностированной методами компьютерной, магнитно-резонансной и позитронно-эмиссионной томографии с 18F-фтордезоксиглюкозой, совмещённой с компьютерной томографией. В обоих случаях пациенты поступили в клинику с подозрением на первичную злокачественную опухоль кости, по результатам комплексного лучевого диагностического исследования и гистологической верификации установлен диагноз солитарной эозинофильной гранулёмы. Солитарная эозинофильная гранулёма кости ― достаточно редкое (менее 1% случаев всех опухолевых объёмных образований скелета) заболевание. Наиболее часто эозинофильная гранулёма обнаруживается в теменной и лобных костях черепа и представляет собой остеолитическое объёмное образование, постепенно увеличивающееся в размерах. Несмотря на то, что бΌльшую часть опухолей костной ткани можно выявить при помощи рентгенографии, предпочтительно применение компьютерной томографии, в первую очередь из-за её превосходной способности визуализировать деструкции кортикального слоя кости. Диагностическая точность компьютерной и магнитно-резонансной томографии может быть различна. Комплексное применение методов лучевой и радионуклидной диагностики позволяет сузить спектр дифференциального диагноза. К сожалению, относительно низкая специфичность существующих лучевых диагностических исследований в большинстве случаев не позволяет установить точный диагноз, и методом выбора остаётся биопсия с последующим патоморфологическим исследованием. Данные клинические наблюдения показывают необходимость включения эозинофильной гранулёмы в дифференциальный диагноз при обнаружении солитарного остеолитического очага.</p></trans-abstract><trans-abstract xml:lang="zh"><p>本文介绍计算机诊断嗜酸性骨肉芽肿、磁共振和18F氟脱氧葡萄糖正电子发射断层扫描以及计算机断层扫描的两个临床观察。根据综合的放射学诊断研究和组织学证实，确诊为孤立性嗜酸性肉芽肿，两例患者都因怀疑原发性恶性骨肿瘤而入院。孤立性嗜酸性肉芽肿是一种相当罕见的疾病（不到1%的骨骼肿瘤体积形成病例）。最常见的是，嗜酸性肉芽肿见于头骨的顶骨和额骨，是一种溶骨体积的形成，逐渐增大。虽然大多数骨肿瘤可以通过X线摄影发现，计算机体层摄影术是首选，主要是因为它能很好地显示骨皮质层的破坏情况。计算机断层扫描和磁共振成像的诊断准确性可能不同。辐射和放射性核素诊断方法的复杂应用使能够缩小鉴别诊断的范围。在大多数病例中，现有的放射学诊断研究的特异性较低，不能做出准确的诊断，选择的方法仍然是活检后进行病理形态学检查。这些临床观察表明，当发现孤立的溶骨性病灶时，鉴别诊断需要包括嗜酸性肉芽肿。</p></trans-abstract><kwd-group xml:lang="en"><kwd>eosinophilic granuloma</kwd><kwd>osteolytic focus</kwd><kwd>computed tomography</kwd><kwd>magnetic resonance imaging</kwd><kwd>positron emission tomography</kwd><kwd>case report</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>эозинофильная гранулёма</kwd><kwd>остеолитический очаг</kwd><kwd>компьютерная томография</kwd><kwd>магнитно-резонансная томография</kwd><kwd>позитронно-эмиссионная томография</kwd><kwd>клинический случай</kwd></kwd-group><kwd-group xml:lang="zh"><kwd>嗜酸性肉芽肿</kwd><kwd>溶骨性病灶</kwd><kwd>计算机断层扫描</kwd><kwd>磁共振成像</kwd><kwd>正电子发射断层扫描</kwd><kwd>临床病例</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">Lam KY. 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