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[Megaloblastic anemia in children]
L de Lumley1, J Boulesteix, D Borreda
1Service de pédiatrie I, CHU Dupuytren, Limoges, France.
Insights
Accurate diagnosis of pediatric megaloblastic anemia requires vitamin B12 and folic acid level testing before treatment. Consider metabolic disorders and Imerslund
Area of Science:
- Pediatrics
- Hematology
- Nutritional Science
Context:
- Megaloblastic anemia in children is primarily linked to deficiencies in folic acid or vitamin B12.
- Accurate etiological diagnosis is crucial before initiating vitamin supplementation or blood transfusions.
- Neurological abnormalities associated with hematological findings suggest potential vitamin metabolism disorders.
Purpose:
- To emphasize the importance of precise vitamin level testing for diagnosing pediatric megaloblastic anemia.
- To highlight specific conditions like Imerslund's syndrome and drug-induced causes.
- To guide clinicians in considering rare etiologies when vitamin deficiency is absent.
Summary:
- Testing vitamin B12 and folic acid levels is essential for diagnosing pediatric megaloblastic anemia.
- Imerslund's syndrome, characterized by megaloblastic anemia and proteinuria, is a key differential diagnosis.
- Other causes include metabolic disorders, drug-induced effects, and rare hemopathies.
Impact:
- Ensures timely and appropriate treatment for children with megaloblastic anemia.
- Prevents misdiagnosis and ineffective treatment by establishing the correct etiology.
- Improves patient outcomes by considering a broad spectrum of potential causes.
Abstract:
Megaloblastic anemia in children is mainly due to folic acid or vitamin B12 deficiencies. However dosages of these two vitamins must be performed before any vitamin supplementation or blood transfusions are given in order to establish precisely the etiologic diagnosis. A disorder in the metabolism of these vitamins must be considered in any infants in whom the onset of neurological abnormalities is associated with the characteristic hematological abnormalities. Imerslund's syndrome is a specific vitamin B12 malabsorption defect that warrants consideration as it is easy to recognize on the basis of the association of megaloblastic anemia and proteinuria. A possible drug-induced etiology must also be looked for. In the absence of vitamin deficiency, several rare etiologies must be considered. A macrocytosis, occasionally with megaloblastosis reflecting an abnormal erythropoiesis, may accompany an hemopathy, eventually malignant.