Hypernatremic dehydration as a sign leading to the diagnosis of glucose-galactose malabsorption in breast-fed neonates.

Hypernatremic dehydration is described in a case of a breast-fed infant with glucose-galactose malabsorption. Hypernatremic dehydration in general is uncommon in normal breast-fed infants. The finding of hypernatremic dehydration in breast-fed infants with watery diarrhea and sugar in the stool should lead to the consideration of monosaccharide intolerance such as glucose-galactose malabsorption.