Skip to main contentLast updated: 07-Nov-2026
Dr Harsh Shah
MS, MCh (Surgical Gastroenterology), DrNB (Surgical Gastroenterology)
Registered with Gujarat Medical Council, Reg. No. G-38738
Gallbladder Surgeon
Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad · 18 years of experience
In short
A stone is a hard pebble that lies loose inside the gallbladder. A polyp is a bump that grows out of its wall. They look alike on a quick read but behave very differently.
Stones cause the pain, and polyps seldom do. A polyp matters because a few can turn into cancer, so its size is what we watch.
Ultrasound usually tells them apart. A stone moves and casts a dark shadow. A polyp stays fixed and casts none.
If your report names a polyp, the full plan for watching and surgery is on our gallbladder polyps page. This post explains how a polyp differs from a stone, and why the difference changes what you do next.
A gallstone is a solid lump formed from bile. A polyp is tissue that grows from the inner lining of the gallbladder.
People often say “stone” for anything found in the gallbladder, but the two are very different things. One is a deposit that formed inside the bile. The other is part of the gallbladder wall itself.
The radiologist looks for three things: does it move, does it cast a shadow, and is it stuck to the wall.
| Question | Gallstone | Gallbladder polyp |
|---|---|---|
| What is it? | A solid pebble from bile | A bump that grows from the wall |
| Does it move when you turn on the couch? | Yes, it rolls to the lowest point | No, it stays fixed in one place |
| Dark shadow behind it on ultrasound? | Yes, a clear shadow | No shadow |
| Does it usually cause pain? | Often, after fatty meals | Seldom |
| Main concern | Pain, infection, blocked duct | A small chance of cancer |
| What we watch | Whether it gives symptoms | Its size and shape |
Scan reports are written in a hurry, and a few lines on a page cannot show a moving picture. This is why we like to see the images ourselves.
Stones cause the typical gallbladder pain. A polyp on its own seldom hurts, and is usually found by chance.
Stone pain sits under the right ribs or in the upper middle belly. It often comes an hour or two after a heavy meal and can last several hours. It may travel to the right shoulder blade, with nausea or vomiting.
A polyp does not block the outflow of bile, so it rarely gives such pain. If you have this kind of pain and a polyp on your scan, a stone may be hiding with it. The pain still needs a proper look.
Each one carries a different risk. A stone can inflame the gallbladder or block the bile duct, and a polyp can slowly change into cancer.
Stones can cause gallbladder infection, jaundice and pancreatitis. A very large stone, or stones that sit for many years, also raise the chance of gallbladder cancer a little. That risk is small, but it is real.
A polyp does not give warning pain, so it has to be followed with scans. Size is the guide. The bigger it is, the more likely it is a true growth. Read about gallbladder cancer treatment to know why we take this seriously.
Some things look like polyps or stones but are neither. When the ultrasound leaves doubt, a second scan settles it.
A stone stuck to the wall may not roll, and thick sludge or a clot can look like a bump. A thickened patch of wall, called adenomyomatosis, can also fool the eye. These look alike, but their plans differ.
We pick the test that answers your question and skip the rest.
Stones are treated if they cause symptoms. Polyps are treated by size. If both are present, the gallbladder is usually removed.
Pain from stones is the common reason for surgery. A stone that has never caused trouble may only be watched. For a polyp, the choice follows its size, shape and your age. A small one is followed with scans, and a large or growing one is removed.
The operation is the same in both cases. The surgeon removes the whole gallbladder by keyhole surgery. Stones and polyps cannot be taken out alone, because the gallbladder has no part worth saving. When both are present, one operation takes care of both. The gallbladder is then sent to the laboratory so the polyp can be fully examined.
If pain is your main problem, read about gallstones and gallbladder inflammation.
Keep your report and images, note any pain, and book a review. Do not ignore a polyp, and do not assume every lump is a stone.
Bring every earlier scan. A comparison shows whether a polyp has grown or a stone has moved. Tell the surgeon about your age, family history, and any pain or weight loss. Call the same day if you have strong pain with fever, vomiting or yellow eyes.
A stone moves with your position and casts a dark shadow. A polyp stays fixed to the wall and casts no shadow. The radiologist notes these in the report.
No. A stone forms from bile, and a polyp grows from the wall. One does not change into the other, though both can sit in the same gallbladder.
A stone that gives symptoms needs one. A polyp needs one if it is large, growing or has worrying features. A small polyp alone is usually watched with scans.
Yes, it is quite common. In that case the gallbladder is usually removed, since the stones need treatment and the polyp can then be fully examined.
Rarely. Most people with stones never get cancer. A very large stone or stones present for many years raise the risk a little, which is one reason to treat painful stones.
No. In both cases the whole gallbladder is removed by keyhole surgery. The gallbladder is then examined in the laboratory.
That word does not say which it is. Bring the images, and we will check them. An endoscopic ultrasound or CT scan may be added if the picture is not clear.
For the full picture of polyp care, start at the gallbladder polyps page. For questions before you travel, call +91-63555-64601.
Dr Harsh Shah — Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad
Dr. Jivraj Mehta Hospital, Dr Jivraj Mehta Marg, Vasna, Ahmedabad 380007.
Consultations, review of reports and scans, operations and follow-up. OPD Monday to Saturday, 9 am to 5 pm.
Appointments: +91-63555-64601 · +91-63590-11009 · Hospital 079-2663 6363
Directions to the hospital · WhatsApp +91-63555-64601
Not sure if your scan shows a polyp or a stone? Dr Harsh Shah looks at your images with you, tells you which one it is, and explains if it needs watching or an operation. Bring your scan and reports to the consultation. You can also call, or message us on WhatsApp. Call +91-63555-64601 Ask on WhatsApp
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