Condition in which erythrocytes are reduced in number or volume or are deficient in hemoglobin. The patient is usually noticeably pale. Close to 100 varieties exist (including aplastic anemia, pernicious anemia, and sickle-cell anemia), distinguished by cause; erythrocyte size, shape, and hemoglobin content; and symptoms. Anemia may result from blood loss; increased destruction, reduced production, or inhibited formation of red cells; or hormone deficiency. Treatment may involve nutrition, toxin removal, drugs, surgery, or transfusion. See also folic-acid-deficiency anemia, iron-deficiency anemia.
This entry comes from Encyclopædia Britannica Concise.For the full entry on anemia, visit Britannica.com.
What made you look up anemia? Please tell us what you were reading, watching or discussing that led you here.
Take Our 10-Question Quiz
The commonly misspelled words quiz
A quick quiz about stuff worth knowing
How strong is your vocabulary?