[Life-threatening hemorrhage caused by vitamin K deficiency in breast-fed infants].

4 infants (2 males, 2 females) with acute bleedings due to vitamin K-deficiency beyond the neonatal period are reported. Two infants had intracranial haemorrhage and died. All infants were born appropriate for date and became no vitamin K-prophylaxis. All were breast-fed. This report is a further prove for the existence of the late onset haemorrhagic disease of the newborn. The importance of general vitamin K-prophylaxis is outlined.