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Bile duct obstruction

Definition

Bile duct obstruction is a blockage in the tubes that carry bile from the liver to the gallbladder and small intestine.

Related topics include:

Alternative Names

Biliary obstruction

Causes

Bile is a liquid released by the liver. It contains cholesterol, bile salts, and waste products such as bilirubin. Bile salts help your body break down (digest) fats. Bile passes out of the liver through the bile ducts and is stored in the gallbladder. After a meal, it is released into the small intestine.

When the bile ducts become blocked, bile builds up in the liver, and jaundice (yellow color of the skin) develops due to the increasing levels of bilirubin in the blood.

The possible causes of a blocked bile duct include:

  • Cysts of the common bile duct
  • Enlarged lymph nodes in the porta hepatis
  • Gallstones
  • Inflammation of the bile ducts
  • Narrowing of the bile ducts from scarring
  • Injury from gallbladder surgery
  • Tumors of the bile ducts or pancreas
  • Tumors that have spread to the biliary system
  • Liver and bile duct worms (flukes)

The risk factors include:

The blockage can also be caused by infections. This is more common in persons with weakened immune systems.

Symptoms


Exams and Tests

Your doctor or nurse will examine you and feel your belly.

The following blood test results could be due to a possible blockage:

  • Increased bilirubin level
  • Increased alkaline phosphatase level
  • Increased liver enzymes

The following tests may be used to investigate a possible blocked bile duct:

A blocked bile duct may also alter the results of the following tests:

Treatment

The goal of treatment is to relieve the blockage. Stones may be removed using an endoscope during an ERCP.

In some cases, surgery is required to bypass the blockage. The gallbladder will usually be surgically removed if the blockage is caused by gallstones. Your health care provider may prescribe antibiotics if an infection is suspected.

If the blockage is caused by cancer, the duct may need to be widened. This procedure is called endoscope or percutaneous (through the skin next to the liver) dilation. A tube may need to be placed to allow drainage.

Outlook (Prognosis)

If the blockage is not corrected, it can lead to life-threatening infection and a dangerous buildup of bilirubin.

If the blockage lasts a long time, chronic liver disease can result. Most obstructions can be treated with endoscopy or surgery. Obstructions caused by cancer often have a worse outcome.

Possible Complications

Left untreated, the possible complications include infections, sepsis, and liver disease, such as biliary cirrhosis.

When to Contact a Medical Professional

Call your health care provider if you notice a change in the color of your urine and stools or you develop jaundice.

Prevention

Be aware of any risk factors you have, so that you can get prompt diagnosis and treatment if a bile duct becomes blocked. The blockage itself may not be preventable.

References

Afdhal NH. Diseases of the gallbladder and bile ducts. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 158.

Review Date:5/15/2014
Reviewed By:Jenifer K. Lehrer, MD, Department of Gastroenterology, Frankford-Torresdale Hospital, Aria Health System, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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