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Megaloblastic Anemias: Nutritional and Other Causes
Ralph Green1, Ananya Datta Mitra1
1Department of Pathology and Laboratory Medicine, UC Davis Medical Center, University of California Davis Health System, 4400 V. Street, Sacramento, CA 95817, USA.
The Medical Clinics of North America
|February 13, 2017
Summary
Vitamin B12 and folate deficiencies cause megaloblastic anemia. Prompt diagnosis and replenishment of these vitamins are crucial for managing anemia and preventing neurological symptoms.
Area of Science:
- Hematology
- Nutritional Science
- Internal Medicine
Background:
- Megaloblastic anemia is primarily caused by deficiencies in Vitamin B12 and folate.
- Causes of Vitamin B12 deficiency are diverse, including pernicious anemia, gastrointestinal issues, and inherited conditions.
- Folate deficiency, while reduced by fortification, persists due to malabsorption and increased physiological demand.
Purpose of the Study:
- To outline the causes, clinical features, and management of megaloblastic anemia.
- To differentiate the clinical presentations of Vitamin B12 and folate deficiencies.
- To emphasize the importance of accurate diagnosis and timely replenishment.
Main Methods:
- Review of clinical features associated with megaloblastic anemia.
- Analysis of etiological factors contributing to Vitamin B12 and folate deficiencies.
- Description of diagnostic criteria and therapeutic approaches.
Main Results:
- Megaloblastic anemia presents with anemia, cytopenias, jaundice, and characteristic marrow morphology.
- Neurological symptoms are specific to Vitamin B12 deficiency, not folate deficiency.
- Successful management involves identifying the specific deficiency, its cause, and appropriate vitamin replenishment.
Conclusions:
- Vitamin B12 and folate are essential for hematopoiesis, and their deficiencies lead to megaloblastic anemia.
- Understanding the distinct clinical features, particularly neurological manifestations, aids in differential diagnosis.
- Prompt and adequate parenteral or oral replenishment of the deficient vitamin is key to treatment and recovery.
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