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Copy number changes detected in cases with informative copy number analysis in both the tumor and CSF cfDNA. For 11 patients with an informative copy number analysis in CSF cfDNA (x-axis), copy number alterations are indicated, according to their detection in the tumor (blue triangle) or CSF cfDNA (red triangle) at diagnosis, or in one case at relapse (slashed red/blue triangle). Their frequency is indicated in bars on the right.
