Anemia

Last revised by Dr Daniel J Bell on 23 May 2022

Anemia is the presence of reduced hemoglobin in the blood. Formally, the World Health Organizatiοn (WHO) defines anemia by the hemoglobin concentration in the blood according to age and sex 1:

  • adult men: <130 g/L
  • adult women: <120 g/L

Values for pregnant women and children are different.

Pathology

Etiology

The etiology of anemia is traditionally categorized by the volume of the red cell, i.e. the mean cell volume (MCV), into microcytic (MCV <82 fL), normocytic (MCV = 82-98 fL) and macrocytic (MCV >98 fL) anemias. 

Microcytic (MCV <82 fL)
Normocytic (MCV = 82-98 fL) 
Macrocytic (MCV >98 fL)

See also

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.