Jaundice: Difference between revisions
 
(13 intermediate revisions by 2 users not shown)
Line 1: Line 1:
''For neonatal jaundice please see the [[Neonatal jaundice]] page''
''For neonatal jaundice please see the [[Neonatal jaundice]] page''
==Background==
==Background==
[[File:Heme Breakdown.png|thumb|Cycle of heme breakdown and excretion.]]
*Bilirubin is end product of heme metabolism
*Bilirubin is end product of heme metabolism
*All bilirubin products in the body are initially unconjugated and is transported bound to albumin into hepatocytes t o becombined with glucuronic acid into conjugated bilirubin
*All bilirubin products in the body are initially unconjugated and is transported bound to albumin into hepatocytes t o becombined with glucuronic acid into conjugated bilirubin
Line 9: Line 10:
===Jaundice Types===
===Jaundice Types===
'''Prehepatic (overproduction):'''
'''Prehepatic (overproduction):'''
*Hemolysis
*[[hemolytic anemia|Hemolysis]]
*Primarily unconjugated bili
*Primarily unconjugated bili
'''Hepatic (inadequate processing):'''
'''Hepatic (inadequate processing):'''
*Viral, alcohol, toxin
*[[viral hepatitis|Viral]], [[alcoholic hepatitis|alcohol]], toxin
*Primarily unconjugated bili
*Primarily unconjugated bili
'''Posthepatic (underexcretion):'''
'''Posthepatic (underexcretion):'''
Line 19: Line 20:


==Clinical Features==
==Clinical Features==
 
[[File:Jaundice08.jpg|thumb|Jaundice of the skin]]
[[File:Jaundice.jpg|thumb|Pediatric jaundice with icterus of sclera.]]
*Yellow skin, sclera
*+/- dark urine


==Differential Diagnosis==
==Differential Diagnosis==
[[File:Classification of Hyperbilirubinemia.jpeg|thumb]]
{{Jaundice DDX}}
===Indirect Hyperbilirubinemia===
*Hemolytic
**[[G6PD]]
**Drug related
**[[Autoimmune hemolytic anemia]]
*Hematoma resorption
*Ineffective erythropoiesis
*Gilbert's
===Direct (Conjugated) Hyperbilirubinemia===
*[[Choledocholithiasis]]
*[[Cholecystitis]]
*Ascending [[cholangitis]]
*[[AIDS]] cholangiopathy
*Stricture
*Neoplasm
**Pancreatic head
**Gallbladder
**Primary liver (e.g. [[hepatocellular carcinoma]]
**Metastatic
*Obstructing [[AAA]]
===Hepatocellular damage===
''Patient will have severely elevated AST/ALT with often normal Alkaline Phosphatase''
*[[Viral hepatitis]]
*[[Acute liver failure|Fulminant hepatic failure]]
*[[alcoholic hepatitis]]
*Ischemia
*Toxins
**[[Isoniazid]]
**[[Phenytoin]]
**[[Acetaminophen (Tylenol) Toxicity|acetaminophen]]
**Ritonavir
**Halothane
**Sulronamide
*[[Autoimmune hepatitis]]
**Primary biliary cirrhosis
*[[HELLP Syndrome]]
*Congestive Hepatopathy
**[[CHF]]
**[[Sepsis]] (Shock Liver)
 
===Pregnancy Related===
*[[HELLP Syndrome]]
*Acute fatty liver
*[[Hyperemesis gravidarum]]
*[[Cholestasis of pregnancy]]
 
===Transplant Related===
*[[Transplant complications|Transplant rejection]]
*[[Graft-vs-host disease]]
 
===Pediatric Related===
*[[Inborn error of metabolism]]
*[[Neonatal jaundice]] (physiologic)
 
===Additional Differential Diagnosis===
*[[Reye syndrome]]
*TPN
*[[Heatstroke]]
*[[Budd-Chiari]] (with acute ascites)
*[[Wilson's disease]]
*[[Sarcoidosis]]
*[[Amyloidosis]]
 
===Masqueraders===
''Only bilirubin stains the sclera''
*[[Carotenemia]]
*Quinacrine ingestion
*Dinitrophenol, teryl (explosive chemicals)


==Evaluation==
==Evaluation==
[[File:Evaluation of Hyperbilirubinemia.png|thumb|Evaluation algorithm]]
[[File:Evaluation of Hyperbilirubinemia.png|thumb|Evaluation algorithm]]
[[File:Ddx for jaundice by labs.gif|thumbnail]]
[[File:Ddx for jaundice by labs.gif|right|550px|Lab test for jaundice]]
*Urine pregnancy
*Urine pregnancy
*CBC
*CBC
*Chemistry
*Chemistry
*LFT
*[[LFTs]]
**Hepatocyte injury: AST, ALT, alk phos
**Hepatocyte injury: AST, ALT, alk phos
**Hepatocyte catabolic activity: Bilirubin
**Hepatocyte catabolic activity: Bilirubin
*Coags
*[[liver disease induced coagulopathy|Coags]]
**Hepatocyte synthetic function
**Hepatocyte synthetic function
*Albumin
*Albumin
Line 107: Line 43:
*Ammonia
*Ammonia
**Hepatocyte catabolic activity
**Hepatocyte catabolic activity
*Acute hepatitis panel
*[[viral hepatitis|Acute hepatitis panel]]
*Lipase
*Lipase
*[[Urinalysis]]
*[[Urinalysis]]
*?US vs. CT
*?[[RUQ ultrasound|US]] vs. CT vs MRCP
*?Retic count
*?Retic count
*?Haptoglobin/LDH
*?Haptoglobin/LDH
Line 130: Line 66:
*Moderate elevations are seen in all hepatocellular disorders and cirrhosis
*Moderate elevations are seen in all hepatocellular disorders and cirrhosis
*Hemolysis results in elevation of LDH and unconjugated bili
*Hemolysis results in elevation of LDH and unconjugated bili
====Ammonia====
====[[hyperammonemia|Ammonia]]====
*Elevation does NOT correlate with acute worsening of hepatic function in cirrhotic patient
*Elevation does NOT correlate with acute worsening of hepatic function in cirrhotic patient
*Serves as marker of generalized decline than as diagnostic tool or therapeutic end point
*Serves as marker of generalized decline than as diagnostic tool or therapeutic end point
Line 156: Line 92:
*[[Viral hepatitis]]
*[[Viral hepatitis]]
*[[Acute hepatic failure]]
*[[Acute hepatic failure]]
*[[Cirrhosis]]
*[[Ascites]]


==References==
==References==

Latest revision as of 05:59, 20 August 2022

For neonatal jaundice please see the Neonatal jaundice page

Background

Cycle of heme breakdown and excretion.
  • Bilirubin is end product of heme metabolism
  • All bilirubin products in the body are initially unconjugated and is transported bound to albumin into hepatocytes t o becombined with glucuronic acid into conjugated bilirubin
  • Conjugated bilirubin is then excreted into biliary tract
  • Only conjugated bilirubin is water-soluble (present in urine)
  • Normal bilirubin level is <1.1 (70% unconjugated)

Jaundice Types

Prehepatic (overproduction):

Hepatic (inadequate processing):

Posthepatic (underexcretion):

Clinical Features

Jaundice of the skin
Pediatric jaundice with icterus of sclera.
  • Yellow skin, sclera
  • +/- dark urine

Differential Diagnosis

Jaundice

Differential diagnosis of hyperbilirubinemia.

Indirect Hyperbilirubinemia

Direct (Conjugated) Hyperbilirubinemia

Hepatocellular damage

Patient will have severely elevated AST/ALT with often normal Alkaline Phosphatase

Pregnancy Related

Transplant Related

Pediatric Related

Additional Differential Diagnosis

Masqueraders

Only bilirubin stains the sclera

  • Carotenemia
  • Quinacrine ingestion
  • Dinitrophenol, teryl (explosive chemicals)

Evaluation

Evaluation algorithm
Lab test for jaundice
  • Urine pregnancy
  • CBC
  • Chemistry
  • LFTs
    • Hepatocyte injury: AST, ALT, alk phos
    • Hepatocyte catabolic activity: Bilirubin
  • Coags
    • Hepatocyte synthetic function
  • Albumin
    • Hepatocyte synthetic function
  • Ammonia
    • Hepatocyte catabolic activity
  • Acute hepatitis panel
  • Lipase
  • Urinalysis
  • ?US vs. CT vs MRCP
  • ?Retic count
  • ?Haptoglobin/LDH
  • ?APAP/ASA/Utox/ETOH

Liver function tests

Transaminases

  • Transaminases in hundreds associated with mild injury; thousands suggests extensive injury
  • Elevations <5x normal typical of alcoholic liver disease
  • AST:ALT ratio > 2 common in acute alcoholic hepatitis (alcohol stimulates AST production)
  • May be normal in end-stage liver failure
  • ALT more specific marker of hepatocyte injury than AST

Alk phos

  • Mild to moderate elevations accompany virtually all hepatobiliary disease
  • Elevations > 4x normal suggest cholestasis

GGT

  • Elevation in setting of hepatitis suggestive of alcoholic etiology

LDH

  • Moderate elevations are seen in all hepatocellular disorders and cirrhosis
  • Hemolysis results in elevation of LDH and unconjugated bili

Ammonia

  • Elevation does NOT correlate with acute worsening of hepatic function in cirrhotic patient
  • Serves as marker of generalized decline than as diagnostic tool or therapeutic end point

Coagulation Markers (PT/PTT/INR)

  • Marker of synthetic function
  • Correlation between PT prolongation and clinical outcome in fulminant liver disease

Albumin

  • Marker of synthetic function
    • Half-life is 3 weeks so less useful than PT in evaluating fulminant liver disease
  • Low levels also seen in malnutrition

Management

  • Management is dependent on the diagnosis of either conjugated or unconjugated hyperblirubinemia and the severity of the elevation

Disposition

New Onset Jaundice Admission Criteria

  • Transaminase >1,000 IU/L
  • Tbil >10mg/dL
  • Evidence coagulopathy

See Also

References

Retrieved from "https://www.wikem.org/w/index.php?title=Jaundice&oldid=365788"