Hemorrhagic disease of the newborn or, more precisely, vitamin K deficiency bleeding (VKDB) in infancy, according to the Committee of the International Society on Thrombosis and Hemostasis (1), is a bleeding disorder due to vitamin K deficiency. It generally occurs during the neonatal period, but it is occasionally seen in infants several months old (2–4). The postnatal administration of vitami...

OBJECTIVES To investigate whether childhood cancer is associated with intramuscular administration of vitamin K to newborn infants. DESIGN Routines for administration of vitamin K to infants born after normal deliveries during 1973-89 were obtained from maternity hospitals. Occurrence of cancer up to the end of 1991 was identified by comparing these records with the national cancer registry. ...