title: Distribution of lymphomas in Poland according to World Health Organization classification: analysis of 11718 cases from National Histopathological Lymphoma Register project - the Polish Lymphoma Research Group study.
abstract: Most national lymphoma registers rely on broad classifications which include Hodgkin and non-Hodgkin lymphomas (NHL), multiple myeloma and leukaemia. In Poland the National Histopathological Lymphoma Register project (NHLR) was implemented by hematopathologists in accordance with the 2008 WHO classification into haematopoietic and lymphoid tissues. We present the NHLR data and compare lymphoma distribution in Poland, Europe, as well as in North Central and South America. Records of 11718 patients diagnosed in 24 pathology departments from all over the country were retrieved and reclassified into indolent and aggressive lymphomas according to the 2008 revised WHO classification system. DLBCL (32.9%; 2587), CLL/SLL (31.84%; 2504) and MCL (9.04%; 711) were the three most frequent NHL. The ratio of indolent to aggressive NHL was 1.72; 63.25% (4809) to 36.25% (2794) of cases respectively. Multiple myeloma was less frequent as compared to the data from population-based national cancer register (13.32% vs. 28.94%). Major differences between NHLR and European and American data on NHL subtypes concered: higher incidence of aggressive B-cell lymphomas including DLBCL, lower FL and MALT incidence rate. The percentage of unclassified lymphomas in the study was minimal due to participation of hematopathologists.
authors.affiliation: Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine Warsaw, Poland ; Department of Pathology, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology Warsaw, Poland.
authors.forename: Anan
authors.initials: A
authors.lastname: Szumera-Ciećkiewicz
authors.affiliation: Department of Pathomorphology, Jagiellonian University, Collegium Medicum Cracow, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Gałązka
authors.affiliation: Department of Pathomorphology, Jagiellonian University, Collegium Medicum Cracow, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Szpor
authors.affiliation: Department of Pathology, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology Warsaw, Poland.
authors.forename: G
authors.initials: G
authors.lastname: Rymkiewicz
authors.affiliation: Department of Pathology, Chair of Oncology, Medical University Łódź, Poland.
authors.forename: D
authors.initials: D
authors.lastname: Jesionek-Kupnicka
authors.affiliation: Department of Pathology, Oncology Center Cracow, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Gruchała
authors.affiliation: Department of Pathology, Medical University Warsaw, Poland.
authors.forename: B
authors.initials: B
authors.lastname: Ziarkiewicz-Wróblewska
authors.affiliation: Department of Pathology, Faculty of Medical Science, University of Warmia and Mazury Olsztyn, Poland.
authors.forename: G
authors.initials: G
authors.lastname: Poniatowska-Broniek
authors.affiliation: Department of Pathomorphology, Jagiellonian University, Collegium Medicum Cracow, Poland.
authors.forename: S
authors.initials: S
authors.lastname: Demczuk
authors.affiliation: Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine Warsaw, Poland ; Department of Pathology, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology Warsaw, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Prochorec-Sobieszek
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D015994:Incidence; D008223:Lymphoma / Q000145:classification* / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D011044:Poland / Q000453:epidemiology; D012042:Registries; D017678:Sex Distribution; D014944:World Health Organization
keywords: Lymphoma; epidemiology; hematopathology; histopathology; register