Total 12 clinical symptoms reported for Crigler-Najjar syndrome type 1  Very Frequent (5)Occasional (7)

Abnormality of the liver	An abnormality of the liver.   Synonyms:Abnormal liver; Abnormality of the liver; Liver abnormality	Very frequent
Biliary tract abnormality	An abnormality of the biliary tree.	Very frequent
Infantile muscular hypotonia	Muscular hypotonia (abnormally low muscle tone) manifesting in infancy.   Synonyms:Decreased muscle tone in infant; Hypotonia early; Hypotonia in infancy; Hypotonia, early; Infantile hypotonia	Very frequent
Kernicterus	Damage to cerebral nuclei caused in infants by highly increased levels of unconjugated bilirubin. The basal ganglia and brainstem nuclei could be shown to have a yellow staining historically in infants who died of kernicterus, that is, kernicterus is strictly speaking a pathological diagnosis. The presence of kernicterus may be inferred in infants with characteristic acute or chronic bilirubin-induced neurological dysfunction.	Very frequent
Prolonged neonatal jaundice	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.   Synonyms:Neonatal jaundice; Prolonged yellowing of skin in newborn	Very frequent