Genome-wide distribution of optical structural alterations (OSAs) detected in oligodendroglioma. A: Horizontal yellow bars, numbered on the left, represent human chromosomes (heterochromatic regions are in grey). Tick marks depict locations of structural variants from HF087 (red) and HF1551 (blue). B: The total number of events detected in each tumor sample, also broken down by category. C: An example of each class of variant is shown in the inset figure.