Normocytic Anemia

Reticulocyte Count

< 3%

Early-stage anemia chronic disease

↑ferritin (> 100 ng/mL)

Common cause: Chronic inflamm. (e.g. RA)

Blood loss < 1 week

Early-stage Fe deficiency

Aplastic anemia

Renal disease

> 3%

RBC Defect

Extrinsic

Blood loss > 1 week

Immune hemolytic anemia

Micro/macroangiopathic hemolytic anemia

Malaria

Intrinsic

Membrane defect

Hereditary spherocytosis

Hereditary elliptocytosis

Paroxysmal nocturnal hemoglobinuria

HgB abnormal

Sickle cell Disease

Enzyme Deficiency

G6PD

Pyruvate kinase