Summary of copy number changes (except whole chromosome gains and losses) detected by cytogenetics [CGAP and ] and CGH and in chordoma. Vertical lines on the left side of the chromosomes indicate losses and vertical lines on the right correspond to gains. Bold lines refer to CGH data, and dotted lines to cytogenetics findings. Each line corresponds to a tumour: when more than 4 tumours have the same aberration, the number is given above each line. Chromosomes 10, 15 and Y are not included as no subchromosomal gains and losses were detected.