Eur J Pediatr. 1992 Mar;151(3):218-20.

Nutritional vitamin B12 deficiency: two cases detected by routine newborn urinary screening.

Michaud JL, Lemieux B, Ogier H, Lambert MA.

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Department of Paediatrics, Hôpital Sainte-Justine, Côte Ste-Catherine, Montréal, Québec, Canada.

Abstract

We describe two asymptomatic newborns with nutritional vitamin B12 deficiency in whom increased urinary methylmalonic acid was detected by routine neonatal screening at 3 weeks of age. Both infants were exclusively breast-fed. One mother suffered from pernicious anaemia, and the other was a strict vegetarian. Both mothers had no clinical or haematological abnormality, aside from a borderline mean corpuscular volume for the vegetarian mother. This report illustrates the early appearance of functional vitamin B12 deficiency in breast-fed infants of vitamin B12-depleted mothers. It also demonstrates that urinary methylmalonic acid measurement is a sensitive indicator of tissue vitamin B12 deficiency.

PMID:: 1601016; [PubMed - indexed for MEDLINE]

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