Anemia
Aetiological classifications:
  • Decreased RBC production
    • nutritional deficiency – Iron deficiency anemia
- folic acid deficiency anemia
- Vitamin B12 deficiency anemia
    • inactivity of bone marrow – hypoplastic anemia
- irradiation
- anticancer drug
    • Chronic renal disease
    • Chronic inflammatory reaction

    • Hypothyroidism


  • increased RBC destruction

· Corpuscular defect – sickle cell anemia
- thalassemia
- G6PD deficiency anemia
- Spherocytosin

· Extracorpuscular defect – antibodies, drugs, venoms, hypersplenism


  • Abnormal blood loss

· Acute loss

· Chronic loss – menorrhagia
- worms