Definition and epidemiology
Jaundice (icterus) is the clinical sign of hyperbilirubinemia, visible in the sclera, skin, and mucosa once serum bilirubin exceeds roughly 2-3 mg/dL (34-51 micromol/L). It is a sign, not a diagnosis, and R17 is used only when the underlying cause is not yet specified.
- Neonatal jaundice affects the majority of newborns to some degree in the first week of life, most of it physiologic.
- In adults, jaundice is most commonly due to viral hepatitis, alcohol-related liver disease, or gallstone obstruction, with incidence varying widely by region and population.
- Hereditary unconjugated hyperbilirubinemia (Gilbert syndrome) affects a notable minority of the general population and is often an incidental finding.
- Scleral icterus becomes visible before skin jaundice, typically at bilirubin > 2-3 mg/dL
- Isolated unconjugated hyperbilirubinemia with normal CBC/LFTs and worsening with fasting suggests Gilbert syndrome
- Charcot triad (fever, RUQ pain, jaundice) signals ascending cholangitis, a surgical/endoscopic emergency
- Dark urine + pale stools indicates conjugated (obstructive) hyperbilirubinemia
- Painless jaundice with weight loss in an older adult is classic for pancreatic head cancer until proven otherwise
- Kernicterus is the feared complication of untreated severe neonatal unconjugated hyperbilirubinemia
- Ultrasound is the first-line imaging test to distinguish intrahepatic from extrahepatic cholestasis
- N-acetylcysteine is specific antidote therapy for acetaminophen-induced hepatotoxicity and jaundice
Etiology and risk factors
Causes are classically divided by mechanism and by where bilirubin metabolism is disrupted.
Prehepatic (unconjugated, increased production)
- Hemolytic anemias (sickle cell disease, G6PD deficiency, autoimmune hemolysis, hereditary spherocytosis)
- Ineffective erythropoiesis
- Resorption of large hematomas
Hepatic (impaired conjugation or hepatocyte injury)
- Gilbert syndrome and Crigler-Najjar syndrome (conjugation defects)
- Viral hepatitis (A-E)
- Alcoholic or non-alcoholic fatty liver disease, cirrhosis
- Drug-induced liver injury (acetaminophen, isoniazid, many others)
- Autoimmune hepatitis, Wilson disease, hemochromatosis
Posthepatic / obstructive (conjugated, impaired excretion)
- Choledocholithiasis (gallstones in the common bile duct)
- Pancreatic head or cholangiocarcinoma
- Primary sclerosing cholangitis, primary biliary cholangitis
- Biliary strictures, parasitic infection (in endemic regions)
Risk factors include alcohol use, obesity and metabolic syndrome, intravenous drug use, unprotected sex or needle exposure (viral hepatitis), gallstone risk factors (female sex, obesity, rapid weight loss, pregnancy), and certain medications.
Pathophysiology
Bilirubin is produced from heme breakdown, mostly from senescent red blood cells. Unconjugated (indirect) bilirubin is lipid-soluble and bound to albumin in the blood; it is taken up by hepatocytes, conjugated by UDP-glucuronosyltransferase (UGT1A1) to a water-soluble form, and excreted into bile.
- Prehepatic jaundice: excess heme breakdown overwhelms normal conjugation capacity, raising unconjugated bilirubin.
- Hepatic jaundice: hepatocyte injury or inherited enzyme deficiency impairs uptake, conjugation, or secretion, causing a mixed or predominantly conjugated pattern depending on the stage.
- Posthepatic jaundice: mechanical obstruction of bile flow (stone, stricture, tumor) causes conjugated bilirubin to reflux into blood, with bile acids also accumulating and causing pruritus.
Conjugated bilirubin is water-soluble and appears in urine (dark urine), while reduced bile flow to the gut decreases stercobilin, causing pale (acholic) stools in obstructive disease.
Clinical features
- Yellowing of sclera (often the earliest visible sign) and skin
- Dark (tea-colored) urine when conjugated bilirubin is elevated
- Pale, clay-colored stools in obstructive jaundice
- Pruritus, especially with cholestasis
- Right upper quadrant pain, fever, and jaundice (Charcot triad) suggest ascending cholangitis
- Painless jaundice with weight loss raises concern for pancreatic or biliary malignancy
- Signs of chronic liver disease: spider angiomata, palmar erythema, ascites, asterixis, gynecomastia
- In neonates: jaundice progressing cephalocaudally; concern for kernicterus if severe and untreated
Diagnosis
Diagnosis combines history, exam, laboratory bilirubin fractionation, liver enzymes, and imaging.
Laboratory workup
| Pattern | Total bilirubin | Direct/conjugated | AST/ALT | ALP/GGT |
|---|---|---|---|---|
| Prehepatic | High | Normal/low | Normal | Normal |
| Hepatocellular | High | Mixed | Markedly high | Mildly high |
| Cholestatic/obstructive | High | High | Mildly high | Markedly high |
- Complete blood count and reticulocyte count, haptoglobin, LDH, and peripheral smear if hemolysis is suspected
- Viral hepatitis serologies, autoimmune markers (ANA, ASMA, AMA), ceruloplasmin, iron studies as indicated
- Prothrombin time/INR as a marker of hepatic synthetic function
Imaging
- Abdominal ultrasound is first-line to assess for biliary dilation and gallstones
- CT or MRCP for further characterization of biliary or pancreatic lesions
- ERCP when therapeutic intervention (stone removal, stent) is also needed
In neonates, total and direct bilirubin levels are plotted against age in hours to guide treatment thresholds.
Differential diagnosis
- Gilbert syndrome (mild unconjugated hyperbilirubinemia, worsens with fasting/illness, benign)
- Hemolytic anemia
- Viral or alcoholic hepatitis
- Choledocholithiasis and ascending cholangitis
- Pancreatic or biliary malignancy
- Primary biliary cholangitis / primary sclerosing cholangitis
- Drug-induced liver injury
- Neonatal physiologic jaundice vs. breast milk jaundice vs. hemolytic disease of the newborn (Rh/ABO incompatibility)
Management
Treatment targets the underlying cause rather than bilirubin itself in most adult cases.
- Hemolytic causes: treat the underlying hemolytic disorder; folate supplementation, immunosuppression for autoimmune hemolysis, or splenectomy in select cases
- Viral hepatitis: supportive care for acute hepatitis A/E; antivirals for chronic hepatitis B or C per guideline-directed regimens
- Alcoholic/fatty liver disease: alcohol cessation, nutritional support; corticosteroids may be considered in severe alcoholic hepatitis per scoring criteria
- Obstructive causes: ERCP for choledocholithiasis or stricture, biliary stenting or surgery for malignant obstruction, cholecystectomy for gallstone disease
- Cholestatic pruritus: cholestyramine or other bile acid-binding agents, ursodeoxycholic acid in cholestatic liver disease
- Drug-induced liver injury: discontinue offending agent; N-acetylcysteine specifically for acetaminophen toxicity
- Neonatal jaundice: phototherapy is first-line for significant hyperbilirubinemia; exchange transfusion for severe or rapidly rising levels, guided by age-specific nomograms
Guideline society recommendations (AASLD, EASL, NICE) converge on treating the specific etiology; supportive management (hydration, monitoring for coagulopathy and encephalopathy) applies broadly in acute liver failure.
Complications and prognosis
- Kernicterus (bilirubin-induced neurologic dysfunction) in untreated severe neonatal jaundice, causing irreversible brain injury
- Ascending cholangitis and sepsis from untreated biliary obstruction
- Progression to cirrhosis and portal hypertension in chronic hepatic causes
- Coagulopathy and hepatic encephalopathy in acute liver failure
- Prognosis depends entirely on etiology: Gilbert syndrome is benign and lifelong but harmless, while malignant biliary obstruction or fulminant hepatic failure carry significant mortality without prompt treatment.
Pre-Hepatic-Post for jaundice localization: PRE-hepatic (hemolysis, increased production), HEPATIC (hepatocyte injury/enzyme defects), POST-hepatic (obstruction) — match each tier to its bilirubin pattern (unconjugated, mixed, conjugated).
Practice questions
1. A 32-year-old man notices mild yellowing of his sclera during a stressful exam week and after skipping meals. He feels well otherwise. Labs show total bilirubin 2.8 mg/dL with indirect bilirubin predominating, normal AST/ALT, normal CBC, and normal reticulocyte count. Which of the following is the most likely diagnosis?
2. A 68-year-old woman presents with 3 weeks of painless jaundice and 10-pound unintentional weight loss. Exam reveals a palpable, non-tender, distended gallbladder. Labs show markedly elevated conjugated bilirubin and alkaline phosphatase. Which of the following is the most likely underlying diagnosis?
3. A 45-year-old man with a history of gallstones presents with fever, right upper quadrant pain, and jaundice. Blood pressure is 88/56 mmHg and he appears confused. Which of the following is the most appropriate immediate next step?
Frequently asked questions
What causes jaundice?
Jaundice is caused by elevated bilirubin from increased red blood cell breakdown (prehepatic), liver cell dysfunction (hepatic), or blocked bile flow (posthepatic/obstructive). Common specific causes include hemolytic anemia, viral or alcoholic hepatitis, gallstones blocking the bile duct, and tumors of the pancreas or bile ducts. The right workup depends on whether bilirubin is unconjugated or conjugated.
What are the first symptoms of jaundice?
The earliest sign is usually yellowing of the whites of the eyes (scleral icterus), followed by yellowing of the skin as bilirubin rises further. Depending on the cause, this may be accompanied by dark urine, pale stools, itching, fatigue, or abdominal pain. In newborns, jaundice typically starts on the face and spreads downward.
How is jaundice diagnosed?
Diagnosis starts with blood tests measuring total and direct (conjugated) bilirubin, liver enzymes (AST, ALT, ALP, GGT), and a complete blood count to check for hemolysis. The pattern of these results points toward a prehepatic, hepatic, or obstructive cause. Abdominal ultrasound is typically the next step to look for bile duct dilation or gallstones, with CT, MRCP, or ERCP used for further evaluation.
Is jaundice curable?
Jaundice itself resolves once the underlying cause is treated or runs its course; it is a sign, not a standalone disease. Viral hepatitis and gallstone obstruction often resolve fully with appropriate treatment, while chronic liver diseases may cause recurring or persistent jaundice. Some causes, like Gilbert syndrome, are lifelong but harmless and do not require treatment.
Jaundice vs cholestasis — what is the difference?
Jaundice is the visible yellowing caused by any elevated bilirubin, while cholestasis specifically refers to impaired bile flow from the liver, which is one particular cause of jaundice. Cholestasis typically produces conjugated hyperbilirubinemia with elevated alkaline phosphatase and GGT, dark urine, pale stools, and itching, whereas other causes of jaundice (like hemolysis) do not share these obstructive features.
Key drugs
Related conditions and differentials
Sources and further reading
StatPearls (NCBI Bookshelf)MedlinePlusWHO ICD-10: R17
Educational content for medical students, prepared by the WhiteCoat Pro editorial team with AI assistance; every page is reviewed by a second AI model for factual errors. It is not medical advice and does not replace the product label, local guidelines or a clinician.