RT Journal Article SR Electronic T1 Genomic Imbalances Including Amplification of the Tyrosine Kinase Gene JAK2 in CD30+ Hodgkin Cells JF Cancer Research JO Cancer Res FD American Association for Cancer Research SP 549 OP 552 VO 60 IS 3 A1 Joos, Stefan A1 Küpper, Manfred A1 Ohl, Sibylle A1 von Bonin, Frederike A1 Mechtersheimer, Gunhild A1 Bentz, Martin A1 Marynen, Peter A1 Möller, Peter A1 Pfreundschuh, Michael A1 Trümper, Lorenz A1 Lichter, Peter YR 2000 UL http://cancerres.aacrjournals.org/content/60/3/549.abstract AB Comparative genomic hybridization was applied for a comprehensive screening of frequently occurring net gains and losses of chromosomal subregions in small populations of CD30+ Hodgkin cells and their morphological variants. In 12 Hodgkin’s lymphomas, recurrent gains were detected on chromosomal arms 2p, 9p, and 12q (in six, four, and five tumors, respectively) and distinct high-level amplifications were identified on chromosomal bands 4p16, 4q23-q24, and 9p23-p24. In Hodgkin cells with 9p23-p24 amplification, fluorescence in situ hybridization revealed an increased copy number of chromosomal sequences spanning the tyrosine kinase gene JAK2. Several of the imbalances described, in particular a gain in chromosomal arm 9p that includes JAK2 amplification, are similar to the genomic changes detected in primary mediastinal B-cell lymphoma.