title: Round cell neoplasms of children: value of electron microscopy in their diagnosis.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008223:Lymphoma / Q000175:diagnosis / Q000648:ultrastructure*; D008854:Microscopy, Electron; D009447:Neuroblastoma / Q000175:diagnosis / Q000648:ultrastructure*; D012509:Sarcoma / Q000175:diagnosis / Q000648:ultrastructure*; D012512:Sarcoma, Ewing / Q000175:diagnosis / Q000648:ultrastructure*