Fig. 3: DNA copy number alterations in 68 GCAs.

DNA copy number alterations in 68 GCAs subjected to targeted massively parallel sequencing showed that most tumors displayed low levels of copy number alterations; the median fraction of genome altered was 6.1% (range, 0–67%). While no recurrent high-level amplifications or homozygous deletions were detected, individual cases displayed amplifications in genes such as CCND1, MYC, and ERBB2. A subset of cases showed no copy number alterations or non-synonymous mutations. Chromosomes are shown along the x-axis, and cases along the y-axis. Homozygous deletions, dark blue; losses, light blue; gains, orange; amplifications, red.