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Early lesions in lymphoid neoplasia: Conclusions based on the Workshop of the XV. Meeting of the European Association of Hematopathology and the Society of Hematopathology, in Uppsala, Sweden
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2012 (English)In: Journal of hematopathology, ISSN 1865-5785, Vol. 5, no 3, 169-199 p.Article in journal (Refereed) Published
Abstract [en]

The increasing use of immunophenotypic and molecular techniques on lymphoid tissue samples without obvious involvement by malignant lymphoma has resulted in the increased detection of "early" lymphoid proliferations, which show some, but not all the criteria necessary for a diagnosis of malignant lymphoma. In most instances, these are incidental findings in asymptomatic individuals, and their biological behaviour is uncertain. In order to better characterize these premalignant conditions and to establish diagnostic criteria, a joint workshop of the European Association for Haematopathology and the Society of Hematopathology was held in Uppsala, Sweden, in September 2010. The panel reviewed and discussed more than 130 submitted cases and reached consensus diagnoses. Cases representing the nodal equivalent of monoclonal B-cell lymphocytosis (MBL) were discussed, as well as the "in situ" counterparts of follicular lymphoma (FL) and mantle cell lymphoma (MCL), topics that also stimulated discussions concerning the best terminology for these lesions. The workshop also addressed the borderland between reactive hyperplasia, and clonal proliferations such as pediatric marginal zone lymphoma and pediatric FL, which may have very limited capacity for progression. Virus-driven lymphoproliferations in the grey zone between reactive lesions and manifest malignant lymphoma were covered. Finally, early manifestations of T-cell lymphoma, both nodal and extranodal, and their mimics were addressed. This workshop report summarizes the most important conclusions concerning diagnostic features, as well as proposals for terminology and classification of early lymphoproliferations and tries to give some practical guidelines for diagnosis and reporting.

Place, publisher, year, edition, pages
2012. Vol. 5, no 3, 169-199 p.
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Clinical Laboratory Medicine Basic Medicine
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URN: urn:nbn:se:uu:diva-224003DOI: 10.1007/s12308-012-0148-6PubMedID: 24307917OAI: oai:DiVA.org:uu-224003DiVA: diva2:714724
Available from: 2014-04-29 Created: 2014-04-29 Last updated: 2014-06-05Bibliographically approved

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Sundström, Christer
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Molecular and Morphological Pathology
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