Fig. 3

Representation of case S2. a MRI of the frontal (S2-T2) and the occipital lesion(S2-T1), b hematoxylin and eosin (H&E) stain (magnification: 200×) for both Grade II lesions, S2-T1: with chordoid features marked with black arrows. c Phylogeny inferred from the somatic CNV, SNV/INDEL of the 2 lesions