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Megaloblastic anemia - view of red blood cells
Megaloblastic anemia - view of red blood cells

Hypersegmented PMN (Close-up)
Hypersegmented PMN (Close-up)

Blood cells
Blood cells

Megaloblastic anemia

Definition:

Megaloblastic anemia is a blood disorder in which there is anemia with larger-than-normal red blood cells.

Anemia is a condition in which the body does not have enough healthy red blood cells. Red blood cells provide oxygen to body tissues.



Alternative Names:

Anemia - megaloblastic



Causes, incidence, and risk factors:

Megaloblastic anemia is usually caused by a deficiency of folic acid or vitamin B12 .

Other less common causes are:

Risk factors relate to the causes.

See also:



Signs and tests:

For testing information, see:



Treatment:

The first goal is to diagnose the cause of the anemia. The treatment depends on the cause. Anemias related to specific vitamin deficiencies are discussed separately.

See:



Support Groups:



References:

Antony AC. Megoblastic anemias. In: Hoffman R, Benz EJ, Shattil SS, et al., eds. Hematology: Basic Principles and Practice. 5th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2008:chap 39.

Kaferie J, Strzoda CE. Evaluation of macrocytosis. Am Fam Physician. 2009;79:203-208.



Review Date: 1/31/2010
Reviewed By: Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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