DO_cancer_slim NCIthesaurus central nervous system embryonal tumor embryonal tumor with multilayered rosettes A central nervous system embryonal tumor that is characterized by the presence of multilayered rosette formation and typically the presence of amplification of the C19MC region on chromosome 19 (19q13.42) or rarely a DICER1 mutation. disease_ontology Embryonal tumour with multilayered rosettes NCI:C186534 ICDO:9478/3 DOID:0081286