Partial ideogram showing recurrent DNA copy number changes detected by CGH in the MM cases studied. Vertical lines on the right and left of each chromosomal ideogram identify gains and losses, respectively. The proportions of cases showing each of the changes are noted. For chromosomes 6, 9, 11, 13, 15,17, and 22, the lines delineate only the commonly gained or deleted regions. For chromosome 19, both complete and partial gains represented were recurrent.