Regions of LOH and chromosomal gain and loss in myeloma samples, as determined by SNP array. Chromosomes are numbered under the ideogram, with regions of gain indicated to the right of the ideogram in green and regions of deletion to the left of the ideogram in red, for each sample. LOH is shown in the gray panel to the right of the ideogram, where the blue line indicates the number of samples with LOH at that point on the chromosome. The dashed green line indicates the 3-sample mark, the blue dashed line the 5-sample mark, and the red line the 7-sample mark.