Summary of copy number analysis (CytoGenomics v2.0 software; Agilent). Low grade (LG) biopsies (A) and their correspondent cell cultures (B); high grade (HG) biopsies (C) and their correspondent cell cultures (D). All the samples were analyzed using human 8 x 60 K CGH microarrays (Agilent). The y-axis represents log2 ratio value. The x-axis represents the genomic position of probes with chromosome numbers indicated. Significative gains (log2 ratio > +0.5) and losses (log2ratio < −1.0) are shown in red and green colors, respectively. Gray color represents nonsignificant recurrence of aberrations.