The Gallbladder
The gallbladder is a small sac located just under your liver, beneath the right ribcage. It stores and concentrates bile, a greenish-brown fluid made by the liver. Bile travels from the gallbladder through the bile ducts into the small intestine, where it helps digest food, especially fats. Gallbladder polyps are small growths that form on the inner lining of the gallbladder. Most are benign (non-cancerous) and don’t cause any symptoms. They’re usually found by chance during an ultrasound scan done for another reason.
Understanding Gallbladder Polyps
Most gallbladder polyps cause no symptoms at all and are found incidentally during an ultrasound scan. When symptoms do occur, they are usually due to another gallbladder condition, such as gallstones, rather than the polyps themselves. Possible symptoms include:
- Discomfort or pain in the upper right abdomen
- Nausea or indigestion, especially after eating fatty foods
If symptoms are present, your healthcare provider will consider whether they are truly due to the polyp or another underlying issue. There are several types of gallbladder polyps and only a very small number have the potential to become cancerous, which is why larger polyps or those that change over time are monitored more closely.
- Cholesterol polyps: The most common type. These form when cholesterol deposits build up on the gallbladder wall. They are harmless and not linked to cancer.
- Inflammatory polyps: These can occur when the gallbladder has long-term irritation or inflammation (for example, from gallstones or recurrent infections).
- Adenomas (true polyps): These are much less common and are growths of actual gallbladder tissue. A small proportion may carry a risk of becoming cancerous, especially when they grow larger.
- Malignant polyps (gallbladder cancer): These are rare and occur when abnormal cells form a cancerous growth in the gallbladder. They are usually larger, may grow more quickly, and require specialist evaluation and treatment.
Risk Factors
Gallbladder polyps can occur in anyone, but certain factors make them more likely.
- Age Polyps are more commonly found in people over 50.
- Gallbladder inflammation Long-term irritation from gallstones or recurrent infections increases the likelihood of inflammatory polyps.
- High cholesterol levels Raised cholesterol can lead to cholesterol polyps, the most common and harmless type.
- Metabolic conditions Obesity, metabolic syndrome, and fatty liver disease are linked to a higher chance of cholesterol polyps.
- Primary sclerosing cholangitis (PSC) People with PSC have a higher risk of gallbladder abnormalities, including polyps with a greater chance of becoming cancerous.
- Family history / hereditary syndromes (rare) Conditions such as familial adenomatous polyposis can increase the risk of true adenomas, though this is uncommon.
Diagnosing Gallbladder Polyps
Gallbladder polyps are most commonly found during imaging tests done for abdominal symptoms or as part of an assessment for gallbladder issues such as pain or gallstones.
- Ultrasound The main test for diagnosing gallbladder polyps is an abdominal ultrasound. It can show the number, size, and appearance of polyps, any associated gallstones, and changes in the gallbladder wall that might raise concern. Ultrasound is painless, quick, and widely available, making it the first-choice investigation.
- Additional Imaging If the ultrasound findings are unclear, or if the polyp is larger or has features of concern, further scans may be arranged, such as CT or MRI scans, or endoscopic ultrasound.
Treatment Options
Management of gallbladder polyps depends on several factors, including the size of the polyp, whether it changes over time, and your individual risk factors (such as age or certain medical conditions). Your healthcare team will use these to decide whether monitoring or treatment is needed. Most gallbladder polyps are harmless and do not require any treatment. However, some may need regular follow-up or removal of the gallbladder.
Observation & Monitoring
Small polyps that appear low-risk are usually managed with regular ultrasound scans. These scans check whether the polyp changes in size or appearance. If a polyp remains stable, ongoing monitoring may eventually be stopped.
Surgical Management
If a polyp reaches a certain size, grows over time, or if you have additional risk factors, your doctor may recommend removing the gallbladder (cholecystectomy). Because scans cannot always determine the exact nature of a polyp, the only way to know for certain whether a polyp is cancerous or not is to remove the gallbladder and examine the tissue.
- Laparoscopic Cholecystectomy Keyhole gallbladder removal. The most common method to remove the gallbladder, performed through a few small abdominal incisions using a camera and special instruments. Most patients go home the same day or after an overnight stay.
- Open Surgery For more complex cases, the surgeon makes a larger incision in the abdomen to remove the gallbladder. The gallbladder is carefully detached and removed, and the incision is closed with stitches. Recovery is longer than keyhole surgery, usually taking several weeks before normal activities can be resumed.
If your polyp is linked to issues such as gallstones, inflammation, or certain liver conditions, treating these may also help guide the management plan.