DICER1 and ependymoma: For example, CNS_136, assigned to the YAP1‐fused supratentorial ependymoma subclass, had focal loss at the YAP1 locus, reported in other tumours from the same molecular subtype [34] (Figure 5A) and among the pineoblastomas that received a subclass, CNS_020, assigned to the miRNA pathway altered group 2 subtype, had losses of chromosomes 8, 14, 16 and 20 (Figure 5B) and DICER1 mutations, NM_177438.3:c.3374G>T and NM_177438.3:c.1849_1850del.