title: Erythroblastic islands and ineffective erythropoiesis in vitamin B12 deficiency.
mesh_terms: D000368:Aged; D000749:Anemia, Megaloblastic / Q000097:blood; D000752:Anemia, Pernicious / Q000097:blood; D001853:Bone Marrow / Q000032:analysis; D001854:Bone Marrow Cells; D004913:Erythrocytes, Abnormal; D004920:Erythropoiesis; D005260:Female; D006801:Humans; D008264:Macrophages; D008297:Male; D008534:Megaloblasts; D008854:Microscopy, Electron; D008875:Middle Aged; D008938:Mitosis; D014806:Vitamin B 12 Deficiency / Q000097:blood*