Jaundice, (Hyperbilirubinemia) A Simple Guide To The Condition, Diagnosis, Treatment And Related Conditions

Jaundice is the yellow color of the skin, mucus membranes, or eyes.
The yellow coloring occurs from by the excessive accumulation in the tissues of bilirubin, a byproduct of old red blood cells.
The normal serum bilirubin is about 3-20 mol/L.
Jaundice is not normally obvious until serum bilirubin is over 35 mol/L.
Jaundice can be a symptom of many health disorders.
The detection and differential diagnosis of jaundice are essential in medical evaluation.
The types of bilirubin are:

1. Un-conjugated bilirubin which is toxic, fat soluble and cannot be excreted by the kidneys
2. Conjugated bilirubin which the hepatocytes in the liver has conjugated the un-conjugated bilirubin and excretes in the bile.
   Conjugated bilirubin is water soluble and in high levels is also excreted in the urine as dark tea colored urine.
   Bilirubin is created from the breakdown of hemoglobin in the reticuloendothelial system.
   95% of the circulating bilirubin is un-conjugated and attached to albumin.
   The bilirubin-albumin complex is broken down by hepatocytes allowing free albumin to circulate.
   Jaundice can happen if:
3. Too many red blood cells are dying or breaking down and going to the liver
4. The liver is overloaded or injured
5. The bilirubin from the liver is not able to properly move into the digestive tract
   Jaundice is often a sign of a disorder with the liver, gallbladder, or pancreas.
   The causes of jaundice are:
6. Hemolytic anemia is due to the break up of red blood cells
   Here the major form of bile pigment is un-conjugated
7. Hepato-cellular or liver causes:
   Acute liver causes are:
   a. Viral hepatitis A to F,
   b. Alcoholism,
   c. Toxic chemical hepatitis including drugs and
   d. Bacterial infections such as leptospirosis.
   More of conjugated bilirubin at early stages is followed by un-conjugated bilirubin.
   Chronic liver causes are:
   a. Chronic liver cirrhosis produces mostly un-conjugated bilirubin
8. Obstructive jaundice: mainly conjugated bilirubin accumulates
   a. Intra-hepatic cholestasis due to drug sensitivity
   b. Extra-hepatic gallstones, carcinoma of biliary systems or adjacent organs.
   Disorders that can cause jaundice are:
9. Infections
10. Use of certain drugs
11. Cancer
12. Blood disorders,
13. Gallstones,
14. Birth defects and
15. A number of other medical disorders resulting in jaundice.
    The effects of jaundice are:
16. Yellowing of the skin and white of eye and mucous membranes like inside of the lips
17. Liver enlargement and palpable gallbladder in blockage
18. Enlarged spleen especially in hemolytic anemia
19. Dark colored urine due to presence of bilirubin in the urine
20. Pale stools
21. Prolonged tiredness from anemia, loss of blood,
22. Encephalopathy from bilirubin affecting the brain
23. Nausea and vomiting.
24. Poor appetite
    Jaundice is not the same as carotenaemia (where the sclera remains white).
    Jaundice will be obvious if the total bilirubin is >35 mol/L.
    In jaundice, the important rapid differentiation of the main causes (hepatitis, biliary stasis, hemolysis, resolution of hematoma or congenital causes) can often be obtained by doing:
    Urinary bilirubin and urobilinogen
    Hepatitis serology should be done in all patients with cholestasis, as distinguishing hepatitis from extra-hepatic obstructive causes may be very difficult.
    Liver function tests
    Serum antinuclear antibodies (ANAs), anti-smooth muscle antibody (ASMA)
    MRCP may become the test of choice in obstructive jaundice
    Liver biopsy
    Treatment will depend on the diagnosis and cause of the jaundice in each individual case
    a. Blood transfusion or platelet transfusion for hemolytic anemia
    b. Treatment of infections

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