Jaundice Prolonged neonatal jaundice HP:0000986 Prolonged yellowing of skin in newborn Jaundice, neonatal UMLS:C1859236 UMLS:C0022353 HP:0006579 Neonatal jaundice refers to a yellowing of the skin and other tissues of a newborn infant as a result of increased concentrations of bilirubin in the blood. Neonatal jaundice affects over half of all newborns to some extent in the first week of life. Prolonged neonatal jaundice is said to be present if the jaundice persists for longer than 14 days in term infants and 21 days in preterm infants. SNOMEDCT_US:387712008 Neonatal jaundice