If the tumour blocks the bile duct, causing jaundice (see symptoms), and it’s not possible to remove it, your doctors may suggest you have a procedure to relieve the blockage and allow bile to flow into the small bowel again. The jaundice will then clear up. There are three ways of doing this. These are ERCP, PTC (percutaneous transhepatic cholangiography) and bypass surgery.
ERCP and PTC
In ERCP and PTC, a tube called a stent is placed into the inside of the blocked bile duct to hold it open. The ERCP method is often used when ERCP is first carried out as an investigation (see further tests).
You’ll be asked not to eat or drink anything for six hours before the procedure, so that the stomach and duodenum are empty. You will be given a sedative by injection, and the endoscope will be passed through your mouth (as described on the further tests page).
A dye will be used, as before. X-rays are taken, and by looking at the x-ray picture the doctor will be able to see the narrowing in the bile duct. The narrowing can be stretched and a tube put in through the endoscope, allowing the bile to drain.
The tube may need to be replaced later if the jaundice comes back or if an infection occurs.
The PTC method is similar to ERCP in that a dye is used to show up the blockage on x-ray. Instead of the tube being inserted through an endoscope, a needle is inserted through the skin just below your rib cage and a fine guide wire passed through the liver and into the blockage in the bile duct. The tube is then passed along this wire.
As with ERCP, you will be asked not to eat or drink for at least six hours beforehand, and you will then be given a sedative. You will also have a local anaesthetic so you should not feel pain as the needle or wire is passed through your skin, although moving the wire into the correct position in the bile duct can be painful. To help prevent any infection you will be given antibiotics before and after the procedure. It is likely that you will stay in hospital for a few days afterwards.
Sometimes, if the tube can’t be passed into the bile duct from the duodenum during ERCP, a combination of ERCP and PTC is carried out.