Comparative genomic hybridization in follicular lymphoma. (A) Chromosomal gains and losses in 127 FL cases showing altered karyotypes by comparative genomic hybridization (CGH). Gains are displayed in green bars and losses are displayed in red bars. (B) Selected genes that show up-regulation in follicular lymphoma (FL) with chromosomal gains in respective regions (1q, 2p, 7q, 8q, 12q and 18q) or down-regulation in FL with chromosomal losses in respective regions (6q, 10q).