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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Oncohematology</journal-id><journal-title-group><journal-title xml:lang="en">Oncohematology</journal-title><trans-title-group xml:lang="ru"><trans-title>Онкогематология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1818-8346</issn><issn publication-format="electronic">2413-4023</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">638</article-id><article-id pub-id-type="doi">10.17650/1818-8346-2007-0-2-10-15</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>DIAGNOSIS OF HEMATOLOGIC MALIGNANCIES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ДИАГНОСТИКА ГЕМОБЛАСТОЗОВ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Pitfalls in the pathological diagnosis of multiple myeloma</article-title><trans-title-group xml:lang="ru"><trans-title>Трудности морфологической диагностики множественной миеломы</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Baykov</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Байков</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>St Petersburg </p></bio><bio xml:lang="ru"><p>Санкт-Петербург</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">St Petersburg Pavlov state medical university</institution></aff><aff><institution xml:lang="ru">Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2007-05-23" publication-format="electronic"><day>23</day><month>05</month><year>2007</year></pub-date><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>10</fpage><lpage>15</lpage><history><date date-type="received" iso-8601-date="2022-11-23"><day>23</day><month>11</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-11-23"><day>23</day><month>11</month><year>2022</year></date></history><permissions><copyright-year>2007</copyright-year><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://oncohematology.abvpress.ru/ongm/article/view/638">https://oncohematology.abvpress.ru/ongm/article/view/638</self-uri><abstract xml:lang="en"><p>During 1999-2006, a total of 350 trephine biopsy specimens were evaluated in our department for presence of multiple myeloma. The diagnosis of plasma cell neoplasm was made in 148 cases. In 30% of specimens plasma/myeloma cell count was below 30%, and in 7% - below 10%. Giemsa staining improved detectability of plasma cells. In cases with low plasma cell count immunohistochemistry for CD138 and Ig light chains was able to pick out neoplastic cells and to confirm monoclonality, therefore it was a useful adjunct for morphologic diagnosis. Difficulties in morphological evaluation of trephine biopsies are discussed. It is concluded that the diagnosis of multiple myeloma is based on clinical, laboratory and morphologic data.</p></abstract><trans-abstract xml:lang="ru"><p>В течение 1999—2006 гг. в нашей лаборатории исследовано около 350 трепанобиоптатов больных множественной миеломой (ММ) и пациентов с подозрением на ММ. Наличие опухоли подтверждено морфологически у148 больных. У трети больных миеломные клетки по результатам обзорных исследований составляли менее 30%, а у 7% — менее 10% всех миелокариоцитов. У этих больных диагноз ММ был поставлен при иммуногистохимическом исследовании. Выявление CD138 и легких цепей иммуноглобулинов позволяет оценить истинное содержание и локализацию плазматических/миеломных клеток в костном мозге, а также их клональное происхождение. Обсуждаются трудности диагностики миеломной болезни по трепанобиоптатам.</p></trans-abstract><kwd-group xml:lang="en"><kwd>multiple myeloma</kwd><kwd>trephine biopsy</kwd><kwd>immunohistochemistry</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>множественная миелома</kwd><kwd>трепанобиоптат</kwd><kwd>иммуногистохимия</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">1.	Terpstra W.E., Lokhorst H.M., Blomjous F. et al. Comparison of plasma cell infiltration in bone marrow biopsies and aspirates in patients with multiple myeloma. 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