Schematic representation of novel chromosomal imbalances in MCL cases. Gains are shown in light gray and losses in dark gray. The centromere is represented by an arrowhead. MB positions and chromosome bands were determined with the UCSC genome browser (April 2003 freeze). When consecutive areas of the same case were less than 5 BAC clones apart and these clones had a mean similar to the mean of the consecutive areas, they were combined in 1 consecutive area. The minimal overlapping regions identified in these chromosomes are 4p12-13, 20p12.1-12.3, 20q12-13.12, 22q12.1-12.3, and 22q13.31-13.32.