Partial ideograms comparing the recurring chromosomal gains and losses detected by G-banding in 72 of the 96 tumors assayed for gene amplification (A), the subset of 20 tumors assayed by CGH (B), and gains and loses detected by CGH in the same subset of 20 tumors (C). Thin vertical lines on either side of the chromosome ideogram indicate only recurrent gains (right) or losses (left) of a chromosome or a chromosomal region. Gains/losses were considered recurrent if observed in two or more tumors. Thick lines in (C) indicate regions of high copy number (amplification) as defined in the text.