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Summary
This guide details laboratory tests for diagnosing anemia, categorizing it by red blood cell size and reticulocyte count. It covers microcytic, macrocytic, and normocytic anemias, including new findings and diagnostic approaches.
Area of Science:
- Hematology
- Clinical Pathology
Background:
- Anemia diagnosis relies on complete blood count and reticulocyte count.
- Anemias are classified as microcytic, macrocytic, or normocytic, with or without reticulocytosis.
Purpose of the Study:
- To outline the laboratory evaluation of various anemia types.
- To highlight recent advancements in diagnosing macrocytic anemias and hemolytic anemias.
Main Methods:
- Categorization of anemia based on red blood cell indices (microcytic, macrocytic, normocytic).
- Utilizing peripheral smear examination and specific laboratory tests (serum iron, TIBC, ferritin, hemoglobin electrophoresis).
- Employing micro-Coombs' test and ektacytometry for hemolytic anemias.
Main Results:
- Erythrocyte size-distribution width aids in differentiating iron deficiency from thalassemia minor.
- Recognition of nitrous oxide-induced megaloblastosis and neurologic dysfunction.
- Identification of normocytic anemia causes, including megaloblastic anemia and acquired immunodeficiency syndrome.
Conclusions:
- A systematic laboratory approach is crucial for accurate anemia diagnosis.
- Updated diagnostic strategies are essential for macrocytic and hemolytic anemias.
- Diverse etiologies exist for normocytic anemia without reticulocytosis.