When primary teeth erupted in an 11-month-old male infant with congenital cytomegalovirus infection they were green and had hypoplastic enamel (fig 1). He had been icteric from birth, with a serum bilirubin concentration of 156 μmol/l (72% conjugated) 1 h after delivery. At the age of 9 days, bilirubin concentrations peaked at 497 μmol/l (95% …