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Neonatal cholestasis refers to elevated levels of conjugated bilirubin identified in newborn infants within the first few months of life. [1] Conjugated hyperbilirubinemia is clinically defined as >20% of total serum bilirubin or conjugated bilirubin concentration greater than 1.0 mg/dL regardless of total serum bilirubin concentration. [2]
There are additional rare causes of hereditary hyperbilirubinemia like Lucey-Driscoll syndrome and Heme Oxygenase-1 Deficiency. [1] Both Gilbert syndrome and Crigler-Najjar syndrome cause an elevated unconjugated bilirubin level due to mutations in the UGT1A1 gene, which conjugates bilirubin within liver cells so it can be excreted.
In newborns, jaundice tends to develop because of two factors—the breakdown of fetal hemoglobin as it is replaced with adult hemoglobin and the relatively immature metabolic pathways of the liver, which are unable to conjugate and so excrete bilirubin as quickly as an adult. This causes an accumulation of bilirubin in the blood ...
Jaundice, also known as icterus, is a yellowish or greenish pigmentation of the skin and sclera due to high bilirubin levels. [3] [6] Jaundice in adults is typically a sign indicating the presence of underlying diseases involving abnormal heme metabolism, liver dysfunction, or biliary-tract obstruction. [7]
As bilirubin increases, it causes jaundice (a yellow appearance.) If the bilirubin level climbs too high, it can leave deposits on the brain, resulting in permanent and irreversible mental ...
Bilirubin should be tested from cord blood. [5] Ferritin - because most infants affected by HDN have iron overload, ferritin levels must be measured before giving the infant any additional iron. [11] Newborn Screening Tests - Transfusion with donor blood during pregnancy or shortly after birth can affect the results of the Newborn Screening Tests.
Intrahepatic cholestasis of pregnancy (ICP), also known as obstetric cholestasis, cholestasis of pregnancy, jaundice of pregnancy, and prurigo gravidarum, [1] is a medical condition in which cholestasis occurs during pregnancy. [2] It typically presents with itching and can lead to complications for both mother and fetus. [2]
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