title: Prognostic importance of nucleolar organiser regions in Ewing's sarcoma of childhood.
mesh_terms: D001859:Bone Neoplasms / Q000648:ultrastructure*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D009697:Nucleolus Organizer Region / Q000648:ultrastructure*; D011379:Prognosis; D012512:Sarcoma, Ewing / Q000648:ultrastructure*; D013194:Staining and Labeling