Classification of anemia

Etymologically the term anemia means "without blood". Anemia is defined as diseases of the blood (hematological), characterized by a depletion of red blood cells or hemoglobin, being coincident in both the majority of cases. That anemia is diagnosed when there is a decrease in red cell mass, which is insufficient to provide oxygen to the cells.

Classification of anemias
Anemias can be classified by many different criteria. Among the most important classifications highlight: for the sake producer or red cell indices, including VCM.

Anemias caused by producer
Anemia from blood loss: haemorrhage

Production deficiency anemia by red blood cells: idiopathic congenital aplastic etc.

Hemolytic anemias caused by drugs, spherocytosis, for hemoglobin disorders, congenital deficiency of glucose-6-phosphate dehydrogenase for enzymatic conditions.

Anemias Secondary: As a result of a disease process known: cancer, cirrhosis, epistaxis, AIDS, ulcers, etc..

Deficiency anemia: iron, vitamin B12, vitamin B9, erythropoietin, etc.

Anemia from the viewpoint of mean corpuscular volume (MCV) or red cell indices

a. - macrocytic and hyperchromic (high color). (MCV)> 97 fL. Are anemia in which red blood cells decrease in number rather than hemoglobin content, so the amount of hemoglobin per red blood cell (MCH) becomes higher than normal. Examples of this type of anemia are:
- Pernicious anemia or megaloblastic anemias.

- Alcoholism.

- Hepatic impairment.

- Hypothyroidism

- Medullary aplasia (some organs).

b. - microcytic or hypochromic (low color). (MCV <83fL and / or MCH <27 pg)

Are anemia in which red blood cells are decreased, however its hemoglobin content rather than diminished their numbers. The HCM comes out lower than normal red blood cells being bleached. This type of anemia are:
- Microcytic anemia or iron deficiency.

- Thalassemia.

- Some sideroblastic anemias.

- Lead poisoning (sometimes).

- Aluminum intoxication (rare).

- The anemia caused by chronic diseases (sometimes).

c. - normocytic. (MCV = 83-97 fL)
In these cases the MCV is within the normal reference range.

Examples of this type of anemia are:
- The anemia caused by chronic diseases (almost always).

- Hemolytic anemias (except reticulocytosis).

- Medullary aplasia (the majority).

- Losses acute (rare except reticulocytosis).

Related topics:
Anemia: Symptoms
General blood test
Anemia. Treatments and remedies

*Automatic Translation