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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 151 (1992), S. 218-220 
    ISSN: 1432-1076
    Keywords: Vitamin B12 ; Methylmalonic aciduria ; Newborn screening ; Cobalamin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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 breastfed infants of vitamin B12-depleted mothers. It also demonstrates that urinary methylmalonic acid measurement is a sensitive indicator of tissue vitamin B12 deficiency.
    Type of Medium: Electronic Resource
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