title: Letter: Immunoblasts.
mesh_terms: D000921:Antibody-Producing Cells / Q000648:ultrastructure; D002452:Cell Count; D006801:Humans; D007244:Infectious Mononucleosis / Q000276:immunology* / Q000473:pathology; D008214:Lymphocytes / Q000276:immunology*; D008854:Microscopy, Electron; D008258:Waldenstrom Macroglobulinemia / Q000276:immunology* / Q000473:pathology