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Frequent Infections, Hypotonia, and Anemia in a Breastfed Infant
Fatma Kamoun1, Rime Guirat, Fatma Megdich
1*Pediatrics Department, Hedi Chaker Hospital †Faculty of Medicine of Sfax ‡Hematology Laboratory, Habib Bourguiba Hospital, Sfax, Tunisia.
Insights
Maternal pernicious anemia caused vitamin B12 deficiency in an infant, leading to pancytopenia and failure to thrive. Supplementation rapidly resolved these severe hematologic and developmental issues.
Area of Science:
- Pediatrics
- Hematology
- Nutrition
Background:
- Vitamin B12 deficiency can cause severe hematologic and neurodevelopmental issues.
- Early diagnosis and intervention are crucial for affected infants.
Observation:
- An 8-month-old exclusively breastfed infant presented with recurrent infections, failure to thrive, hypotonia, and weakness.
- The infant exhibited pancytopenia with megaloblastic bone marrow, low serum IgG, and very low vitamin B12 levels.
Findings:
- The infant's cobalamin deficiency stemmed from the mother's undiagnosed pernicious anemia.
- Elevated urinary methylmalonic acid confirmed the vitamin B12 deficiency.
Implications:
- This case highlights the importance of considering maternal nutritional status in infant health.
- Prompt vitamin B12 supplementation can reverse severe clinical and hematologic abnormalities in infants.
Abstract:
Vitamin B12 deficiency may be responsible of serious hematologic and neurodevelopmental abnormalities. We report the case of an infant who was hospitalized because of recurrent infections, failure to thrive, hypotonia, and weakness. He was 8 months old and had been exclusively breastfed. Blood cell count showed pancytopenia with megaloblastic bone marrow. The serum IgG concentration was low. Vitamin B12 level was very low and associated with increased urinary methylmalonic acid. Cobalamin deficiency was caused by mother's unrecognized pernicious anemia. Vitamin B12 supply led to rapid clinical and hematologic improvement.
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