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      A Literature Revision in Primary Cutaneous B-cell Lymphoma

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          Abstract

          The term “Primary Cutaneous B-Cell Lymphoma” (PCBCL) comprehends a variety of lymphoproliferative disorders characterized by a clonal proliferation of B-cells primarily involving the skin. The absence of evident extra-cutaneous disease must be confirmed after six-month follow-up in order to exclude a nodal non-Hodgkin's lymphoma (NHL) with secondary cutaneous involvement, which may have a completely different clinical behavior and prognosis. In this article, we have summarized the clinico-pathological features of main types of PCBCL and we outline the guidelines for management based on a review of the available literature.

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          Most cited references106

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          WHO-EORTC classification for cutaneous lymphomas.

          Primary cutaneous lymphomas are currently classified by the European Organization for Research and Treatment of Cancer (EORTC) classification or the World Health Organization (WHO) classification, but both systems have shortcomings. In particular, differences in the classification of cutaneous T-cell lymphomas other than mycosis fungoides, Sezary syndrome, and the group of primary cutaneous CD30+ lymphoproliferative disorders and the classification and terminology of different types of cutaneous B-cell lymphomas have resulted in considerable debate and confusion. During recent consensus meetings representatives of both systems reached agreement on a new classification, which is now called the WHO-EORTC classification. In this paper we describe the characteristic features of the different primary cutaneous lymphomas and other hematologic neoplasms frequently presenting in the skin, and discuss differences with the previous classification schemes. In addition, the relative frequency and survival data of 1905 patients with primary cutaneous lymphomas derived from Dutch and Austrian registries for primary cutaneous lymphomas are presented to illustrate the clinical significance of this new classification.
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            A revised European-American classification of lymphoid neoplasms: a proposal from the International Lymphoma Study Group.

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              Cutaneous lymphoma incidence patterns in the United States: a population-based study of 3884 cases.

              There have been no prior large population-based studies focusing on cutaneous lymphomas (CL) in the United States. Using the Surveillance, Epidemiology and End Results (SEER) program data, we analyzed age-adjusted CL incidence rates (IRs) and survival rates by sex and race/ethnicity. There were 3884 CLs diagnosed during 2001-2005. Cutaneous T-cell lymphomas (CTCLs) accounted for 71% (age-adjusted incidence rate [IR] = 7.7/1 000 000 person-years), whereas cutaneous B-cell lymphomas(CBCLs) accounted for 29% (IR = 3.1/1 000 000 person-years). Males had a statistically significant higher IR of CL than females (14.0 vs 8.2/1 000 000 person-years, respectively; male-female IR ratio [M/F IRR] = 1.72; P < .001). CL IRs were highest among blacks and non-Hispanic whites (both 11.5/1 000 000 person-years), followed by Hispanic whites (7.9) and Asian/Pacific Islanders (7.1). The CTCL IR was highest among blacks (10.0/1 000 000 person-years), whereas the CBCL IR was highest among non-Hispanic whites (3.5). Over the past 25 years, the CL IR increased from 5.0/1 000 000 person-years during 1980-1982 to 14.3 during 2001-2003. During 2004-2005, the CL IR was 12.7. This recent apparent change could be incomplete case ascertainment or potential leveling off of IRs. CLs rates vary markedly by race and sex, supporting the notion that they represent distinct disease entities.
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                Author and article information

                Journal
                Indian J Dermatol
                Indian J Dermatol
                IJD
                Indian Journal of Dermatology
                Medknow Publications & Media Pvt Ltd (India )
                0019-5154
                1998-3611
                Mar-Apr 2017
                : 62
                : 2
                : 146-157
                Affiliations
                [1] From the Department of Medical Sciences, Dermatologic Clinic, University of Turin, Turin, Italy
                [1 ] UOC Dermatologia, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
                [2 ] Department of Surgery and Translational Medicine, Section of Dermatology and Venereology, University of Florence Medical School, Florence, Italy
                [3 ] University of Milano-Bicocca, Milan, Italy
                Author notes
                Address for correspondence: Dr. R La Selva, Department of Medical Sciences, Dermatologic Clinic, University of Turin, Turin, Italy. E-mail: robertals@ 123456libero.it
                Article
                IJD-62-146
                10.4103/ijd.IJD_74_17
                5363138
                28400634
                19bae967-a2b3-4f98-914f-7f7345002f4d
                Copyright: © 2017 Indian Journal of Dermatology

                This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.

                History
                : February 2017
                : February 2017
                Categories
                IJD Symposium

                Dermatology
                cutaneous b-cell lymphoma,primary cutaneous marginal zone lymphoma,primary cutaneous follicle-center lymphoma,primary cutaneous diffuse large b-cell lymphoma leg type,primary cutaneous diffuse large b cell lymphoma other

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