Jaundice overview: Difference between revisions
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Revision as of 16:12, 9 June 2015
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Jaundice Microchapters |
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Jaundice overview On the Web |
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American Roentgen Ray Society Images of Jaundice overview |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Jaundice is yellowish discoloration of the skin, conjunctiva (a clear covering over the sclera, or whites of the eyes) and mucous membranes caused by hyperbilirubinemia (increased levels of bilirubin in red blooded animals). Usually the concentration of bilirubin in the blood must exceed 2–3 mg/dL for the coloration to be easily visible.
Causes
When red blood cells die, the heme in their haemoglobin is converted to bilirubin in the spleen and in the hepatocytes in the liver. The bilirubin is processed by the liver, enters bile and is eventually excreted through feces.
Consequently, there are three different classes of causes for jaundice. Pre-hepatic or hemolytic causes, where too many red blood cells are broken down, hepatic causes where the processing of bilirubin in the liver does not function correctly, and post-hepatic or extrahepatic causes, where the removal of bile is disturbed.
Diagnosis
History and Symptoms
Common symptoms of jaundice that the patient will notice, is yellowing of the skin, nausea, and vomiting. Specific symptoms will depend on the underlying factor that caused jaundice to occur.
CT
Abdominal CT scan may be helpful
Other Diagnostic Studies
Endoscopic retrograde cholangio-pancreatography (ERCP)
Treatment
Surgery
Cholecystectomy or ERCP