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A pancreatic pseudocyst is a collection of tissue and fluids that forms on an organ located behind your stomach called the pancreas. It’s usually the result of a hard blow to your abdomen or pancreatitis, which is an inflammation of the pancreas.
"Pseudo" means false. A pseudocyst looks like a cyst but is made from different kinds of tissue than a true cyst. A true cyst is more likely to be cancerous than a pseudocyst.
A pancreatic pseudocyst isn’t usually dangerous unless it ruptures. A ruptured pancreatic pseudocyst is a life-threatening condition. See your doctor immediately if you have any of the following symptoms:
You should pay even closer attention to these symptoms if you or anyone in your family has had pancreatitis.
Pancreatic pseudocysts most often follow a bout of pancreatitis. Pancreatitis is a serious and painful condition. Pancreatic enzymes, which help you digest fats and sugars, overreact and begin to digest the tissues of the pancreas itself. This can cause swelling, bleeding, and damage to the tissues and blood vessels in the pancreas. Cysts typically form when the ducts that carry pancreatic juices to the intestine become blocked.
Pancreatitis can be either acute or chronic. Acute pancreatitis starts suddenly, and it can go away with or without treatment. Chronic pancreatitis resists treatment.
While pancreatitis may be a complication of surgery or due to certain autoimmune disorders, alcoholism is the most common cause of both acute and chronic pancreatitis. Additionally, alcoholism can raise the level of certain fats, or triglycerides, in your bloodstream. Your pancreas helps your body digest fats, but having too much fat to process can damage it.
Pancreatitis can also be due to gallstones. These are pebble-like deposits that develop in the gallbladder, a small organ located near the pancreas that stores bile produced in the liver. Gallstones may be very small, or they can grow as large as a golf ball. In some cases, they may block the ducts that drain the pancreas, causing pancreatitis to develop.
You can have a pancreatic pseudocyst with no symptoms at all. Sometimes, they even go away on their own. According to the Mayo Clinic, doctors accidentally discover many pancreatic pseudocysts when performing a CT or MRI scan to diagnose a different condition.
However, you should also watch for the following symptoms, especially if you’ve recently had pancreatitis or a blow to the torso:
These symptoms can also indicate other conditions, including pancreatic cysts or cancerous tumors. Make sure to tell your doctor about all of your symptoms.
A ruptured cyst may present different symptoms, such as:
If you experience any of these symptoms, seek emergency medical attention or call 911 immediately. A ruptured cyst can cause massive bleeding and infection in the abdomen, and it could be fatal.
If your doctor thinks you may have a pancreatic pseudocyst, they’ll order imaging tests to get a better look at the structure of your pancreas and to gather more detailed information about the cyst.
Your doctor may also order an endoscopic ultrasound. This procedure uses high-powered sound waves to create an image of the abdomen and organs. Your doctor will then insert a thin, flexible tube with a light and camera attached to it into your mouth and down into the upper part of the small intestine. This instrument is called an endoscope. This procedure allows your doctor to gather a small amount of fluid from the cyst to determine if the mass is cancerous.
Your doctor may also ask you:
If your doctor determines that you have a pseudocyst but you don’t have any symptoms, they may suggest you wait to see if the cyst goes away on its own. Regular imaging tests can monitor the growth or shrinking of the cyst.
When a pseudocyst compresses your other organs, your doctor will need to drain it to reduce its size. It also needs draining if it grows so large that it could rupture. Drainage requires surgery under general anesthesia, meaning that you’ll be in a pain-free sleep during the procedure.
Surgery involves making a very small incision to drain the pseudocyst with a needle guided by ultrasound or an endoscopic camera. Alternatively, your doctor might make a larger incision to view the pseudocyst directly.
Your doctor will drain or suction out the contents of the pseudocyst. They’ll send a sample of the contents to a lab to test for infections and signs of cancer. You’ll receive antibiotics even if you don’t have an infection to make sure one doesn’t develop.
Pancreatitis is the most common cause of pseudocysts, so preventing pancreatitis is the best way to prevent cysts from forming. If you drink alcohol regularly or you’re an alcoholic, consider stopping or seeking out treatment for addiction, especially if you have a family history of alcoholism or pancreatitis.
A diet low in carbohydrates and cholesterol and consisting of fresh fruits, fresh vegetables, and lean protein, can lower your triglycerides and help prevent the development of pseudocysts.
The outlook for someone who has a pseudocyst is usually good if there’s no chance of rupture. Surgery to drain pseudocysts has a high recovery rate.
Written by: Elea Carey
Medically reviewed on: Dec 07, 2015: Steven Kim, MD
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