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Macroerythrocyte or macrocyte

Under a magnification of 1000X, this photomicrograph reveals the presence of a macroerythrocyte, or macrocyte, an enlarged erythrocyte (arrowhead), which is seen in macocytosis resulting from vitamin B12 deficiency. (Photomicrograph by Dr. F Gilbert, 1972. Source: Centers for Disease Control and Prevention Public Health Image Library. Public domain.)

Associated Disorders

  • Alcohol-tobacco amblyopia
  • Cerebral vascular disease
  • Dementia
  • Depression
  • Developmental delay
  • Folate deficiency
  • Gastric resection
  • Glossitis
  • Imerslund-Grasbeck syndrome
  • Malabsorption
  • Megaloblastic anemia
  • Myelopathy
  • Optic neuropathy
  • Pernicious anemia
  • Polyneuropathy
  • Regional enteritis
  • Subacute combined degeneration of the spinal cord