Obstructive jaundice
Jaundice is yellow discolouration of the eyes and skin caused by a build-up of bilirubin. Obstructive — or surgical — jaundice means the cause is a blockage preventing bile from reaching the intestine. It is not a diagnosis in itself but a signal, and the whole of its management turns on one question: what is causing the blockage? The answer ranges from a gallstone, which is straightforward to treat, to a pancreatic or bile duct cancer, which is not.
How it forms
Bilirubin is produced continuously from the breakdown of red blood cells. The liver takes it up, conjugates it to make it water-soluble, and excretes it into bile. Bile then travels through the intrahepatic ducts, the common hepatic duct and the common bile duct, and enters the duodenum at the ampulla.
When that pathway is obstructed, conjugated bilirubin cannot escape. It refluxes back into the bloodstream, and because it is water-soluble it is filtered by the kidneys — which is why the urine turns dark. Meanwhile no bile pigment reaches the bowel, so the stools lose their colour and become pale. Bile salts accumulating in the skin cause itching, which for some patients is more distressing than the jaundice itself.
The pattern of dark urine and pale stools together is what distinguishes obstructive jaundice from jaundice caused by liver disease or by excessive red cell breakdown, and it can be established by history alone.
Obstruction has consequences beyond the yellow colour. Absorption of fat and of the fat-soluble vitamins A, D, E and K fails, and vitamin K deficiency impairs clotting — which matters before any intervention. Prolonged obstruction damages the liver, impairs kidney function and immune defences, and stagnant bile readily becomes infected.
Causes
Dividing the causes by whether they are within the duct, in its wall, or outside it is a useful discipline:
- Within the lumen — common bile duct stones, by far the commonest cause; parasites in endemic regions.
- In the wall — cholangiocarcinoma, benign strictures including post-surgical injury, primary sclerosing cholangitis, choledochal cysts, ampullary tumours.
- Outside, compressing — pancreatic head cancer, chronic pancreatitis, a pancreatic pseudocyst, enlarged lymph nodes, Mirizzi syndrome (a gallbladder stone compressing the hepatic duct).
Two clinical patterns help direct the search. Painless, progressive jaundice with weight loss in an older patient suggests malignancy until proved otherwise. Painful, fluctuating jaundice, particularly with fever, suggests stones.
Symptoms
- yellow eyes, then skin
- dark urine — often the earliest thing a patient notices
- pale, putty-coloured stools that are hard to flush
- itching, sometimes severe and worse at night
- pain, if stones or inflammation are the cause; classically absent in malignancy
- fever and rigors, indicating cholangitis — an emergency
- weight loss and anorexia, suggesting malignancy
How the diagnosis is made
Blood tests confirm the obstructive pattern — raised bilirubin with disproportionately raised alkaline phosphatase and gamma-GT, and relatively modest transaminase elevation. Clotting is checked, since vitamin K deficiency is common and correctable. Tumour markers CA 19-9 and CEA are measured, with the caveat that CA 19-9 rises in obstruction of any cause and is unreliable while the patient is jaundiced.
Ultrasound is the first test: it establishes whether the ducts are dilated — confirming obstruction — and often identifies the level and the cause.
Cross-sectional imaging follows. Pancreatic protocol CT assesses a pancreatic or duct mass and its relationship to the vessels. MRI with MRCP maps the biliary tree in detail and is the best non-invasive test for the level and nature of obstruction. Endoscopic ultrasound allows biopsy of a mass or node.
ERCP is used for treatment — stenting, stone removal, brushings for cytology — rather than for diagnosis alone. Where ERCP cannot reach the obstruction, percutaneous transhepatic cholangiography provides an alternative route for drainage.
Treatment
Treatment addresses the cause, not the jaundice. Two principles govern the sequence.
First, drainage is not automatic. In a patient with a potentially resectable tumour who will proceed promptly to surgery, routine preoperative stenting increases infective complications and is avoided. Drainage before surgery is reserved for cholangitis, for severe symptoms such as intractable itching, for very high bilirubin, for malnourished patients requiring optimisation, and where neoadjuvant chemotherapy or a delay is planned.
Second, in cholangitis, drainage is urgent and takes precedence over diagnostic completeness.
Beyond that, treatment follows the cause: ERCP and stone extraction followed by cholecystectomy for duct stones; resection for resectable tumours of the pancreas, bile duct or ampulla; stenting for unresectable malignancy, using a metal stent where life expectancy is longer and a plastic stent where the diagnosis is not yet settled; and reconstruction or stenting for benign strictures.
Supportive measures matter and are often neglected: correcting vitamin K, maintaining hydration and renal function, nutritional support, and specific treatment of itching.
Recovery
Jaundice resolves over days to weeks after the obstruction is relieved — bilirubin falls faster than the skin colour returns to normal, and patients should be told this so they do not think treatment has failed. Itching usually improves quickly. Recovery after definitive surgery depends on the operation performed.
Common questions
Does jaundice always mean cancer?
No. The commonest cause of obstructive jaundice is a gallstone in the bile duct, which is treatable. However, painless jaundice with weight loss, particularly in someone over 50, must be investigated urgently because it can indicate a tumour.
Why is my urine dark and my stool pale?
Because bile is blocked from reaching the bowel. The pigment that normally colours the stool is absent, so it turns pale; and the pigment that has nowhere to go is excreted by the kidneys instead, darkening the urine. The two together indicate a blockage rather than liver disease.
Why do I itch so much?
Bile salts accumulate in the skin when bile cannot drain. The itching is often worse at night and can be more troublesome than the jaundice. It usually improves quickly once the blockage is relieved, and specific treatments can help in the meantime.
How urgent is this?
Jaundice always needs prompt investigation. If it is accompanied by fever or shivering attacks, it is an emergency requiring same-day hospital assessment, because infection in a blocked bile duct can become life-threatening within hours.
Will I need a stent?
Not always. If an operation is planned soon and you are otherwise well, it is often better to proceed directly to surgery, because a stent placed unnecessarily increases the risk of infection. Stents are used when there is infection, severe itching, a long wait, or when the blockage cannot be removed.
How long does the yellow colour take to go?
Blood levels start falling within days of the blockage being relieved, but the yellow tinge in the skin and eyes fades more slowly, often over two to four weeks. This is normal and does not mean the treatment has not worked.
Related conditions
Other conditions of the gallbladder & bile ducts covered on this site:
- Gallstones and biliary colic
- Acute cholecystitis
- Common bile duct stones and cholangitis
- Gallbladder polyps
- Gallbladder cancer
- Cholangiocarcinoma (bile duct cancer)
- Bile duct strictures, cysts and benign tumours
- Bile duct injury after gallbladder surgery
This page provides general information and does not replace an individual medical consultation. Assessment and treatment are decided for each patient after review of their history, examination and imaging.