Array comparative genomic hybridization reveals similarities between nodular lymphocyte predominant Hodgkin lymphoma and T cell/histiocyte rich large B cell lymphoma |
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| Authors: | Sylvia Hartmann Claudia Döring Emily Vucic Fong Chun Chan Daisuke Ennishi Thomas Tousseyn Christiane de Wolf‐Peeters Sven Perner Iwona Wlodarska Martin‐Leo Hansmann |
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| Affiliation: | 1. Dr. Senckenberg Institute of Pathology, Goethe University, Frankfurt am Main, Germany;2. Department of Pathology and Laboratory Medicine and the Centre for Lymphoid Cancer, British Columbia Cancer Agency, University of British Columbia, Vancouver, BC, Canada;3. Bioinformatics Graduate Program, University of British Columbia, Vancouver, BC, Canada;4. Department of Pathology, University Hospitals KU Leuven, Leuven, Belgium;5. Department of Prostate Cancer Research, Institute of Pathology, Centre for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, Bonn, Germany;6. Department of Human Genetics, University KU Leuven, Leuven, Belgium |
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| Abstract: | Nodular lymphocyte predominant Hodgkin lymphoma (NLPHL) and T cell/histiocyte rich large B cell lymphoma (THRLBCL) usually affect middle‐aged men, show tumour cells with a B cell phenotype and a low tumour cell content. Whereas the clinical behaviour of NLPHL is indolent, THRLBCL presents with advanced stage disease and an aggressive behaviour. In the present study, array comparative genomic hybridization was performed in seven typical NLPHL, four THRLBCL‐like NLPHL variants, six THRLBCL and four diffuse large B cell lymphomas (DLBCL) derived from NLPHL. The number of genomic aberrations was higher in THRLBCL compared with typical and THRLBCL‐like variant of NLPHL. Gains of 2p16.1 and losses of 2p11.2 and 9p11.2 were commonly observed in typical and THRLBCL‐like variants of NLPHL as well as THRLBCL. Gains of 2p16.1, affecting the REL locus were confirmed in an independent cohort. Expression of the REL protein was observed at similar frequencies in typical and THRLBCL‐like variant of NLPHL as well as THRLBCL (33–38%). In conclusion, the present study reveals further similarities between NLPHL and THRLBCL on the genomic level, confirming that these entities are part of a pathobiological spectrum with common molecular features, but varying clinical presentations. |
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| Keywords: | nodular lymphocyte predominant Hodgkin lymphoma T cell/histiocyte rich large B cell lymphoma array classic comparative genomic hybridization |
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