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Open Access 01-12-2009 | Short report

Genomic profiling of plasmablastic lymphoma using array comparative genomic hybridization (aCGH): revealing significant overlapping genomic lesions with diffuse large B-cell lymphoma

Authors: Chung-Che Chang, Xiaobo Zhou, Jesalyn J Taylor, Wan-Ting Huang, Xianwen Ren, Federico Monzon, Yongdong Feng, Pulivarthi H Rao, Xin-Yan Lu, Facchetti Fabio, Susan Hilsenbeck, Chad J Creighton, Elaine S Jaffe, Ching-Ching Lau

Published in: Journal of Hematology & Oncology | Issue 1/2009

Abstract

Background

Plasmablastic lymphoma (PL) is a subtype of diffuse large B-cell lymphoma (DLBCL). Studies have suggested that tumors with PL morphology represent a group of neoplasms with clinopathologic characteristics corresponding to different entities including extramedullary plasmablastic tumors associated with plasma cell myeloma (PCM). The goal of the current study was to evaluate the genetic similarities and differences among PL, DLBCL (AIDS-related and non AIDS-related) and PCM using array-based comparative genomic hybridization.

Results

Examination of genomic data in PL revealed that the most frequent segmental gain (> 40%) include: 1p36.11-1p36.33, 1p34.1-1p36.13, 1q21.1-1q23.1, 7q11.2-7q11.23, 11q12-11q13.2 and 22q12.2-22q13.3. This correlated with segmental gains occurring in high frequency in DLBCL (AIDS-related and non AIDS-related) cases. There were some segmental gains and some segmental loss that occurred in PL but not in the other types of lymphoma suggesting that these foci may contain genes responsible for the differentiation of this lymphoma. Additionally, some segmental gains and some segmental loss occurred only in PL and AIDS associated DLBCL suggesting that these foci may be associated with HIV infection. Furthermore, some segmental gains and some segmental loss occurred only in PL and PCM suggesting that these lesions may be related to plasmacytic differentiation.

Conclusion

To the best of our knowledge, the current study represents the first genomic exploration of PL. The genomic aberration pattern of PL appears to be more similar to that of DLBCL (AIDS-related or non AIDS-related) than to PCM. Our findings suggest that PL may remain best classified as a subtype of DLBCL at least at the genome level.

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Title: Genomic profiling of plasmablastic lymphoma using array comparative genomic hybridization (aCGH): revealing significant overlapping genomic lesions with diffuse large B-cell lymphoma
Authors: Chung-Che Chang
Xiaobo Zhou
Jesalyn J Taylor
Wan-Ting Huang
Xianwen Ren
Federico Monzon
Yongdong Feng
Pulivarthi H Rao
Xin-Yan Lu
Facchetti Fabio
Susan Hilsenbeck
Chad J Creighton
Elaine S Jaffe
Ching-Ching Lau
Publication date: 01-12-2009
Publisher: BioMed Central
Published in: Journal of Hematology & Oncology / Issue 1/2009
Electronic ISSN: 1756-8722
DOI: https://doi.org/10.1186/1756-8722-2-47

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