Classification of Anemia According to Underlying Mechanism.

Blood Loss

Acute: trauma

Chronic: lesions of gastrointestinal tract, gynecologic disturbances

Hemolytic anemia

Intrinsic abnormality

Extrinsic abnormality

Antibody mediated

Traumatic

Infection

Sequestration in spleen

Defective RBC production

Aplastic anemia

Defective DNA synthesis

Defective hemoglobin synthesis