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 polyp of 10 mm or more is usually removed. A polyp of 5 mm or less, with nothing else worrying, is usually watched.
Between 6 and 9 mm, size alone does not decide. Your age, the shape of the polyp and the wall of the gallbladder tip the balance.
Size is a guide, not a verdict. Growth on a repeat scan, or a polyp with a broad base, can bring surgery forward at any size.
The full plan for polyps, with tests, follow-up and the operation, is on our gallbladder polyps page. This post answers one question: what size of polyp needs surgery.
Bigger polyps are more likely to be true growths. The chance that a polyp is, or will become, a cancer rises with its size.
Most gallbladder polyps are harmless. Many are small bumps of cholesterol on the inner wall. They do not turn into cancer. A few are true growths called adenomas, and a very few are already cancer.
A scan cannot always tell these apart. Size is the simplest clue we have, so it forms the first step in every decision. It is never the only step.
Ten millimetres is the usual line. At 10 mm or more, the advice is to remove the gallbladder, even if you have no symptoms.
| Size on ultrasound | What is usually advised | Why |
|---|---|---|
| 10 mm or more | Remove the gallbladder | The chance of a true growth is high enough that watching is not safe |
| 6 to 9 mm, with a risk factor | Remove the gallbladder | A risk factor makes a growth more likely |
| 6 to 9 mm, no risk factor | Watch with repeat scans | Most of these stay harmless |
| 5 mm or less | Watch, or no follow-up if the scan is clear | These are nearly always cholesterol bumps |
| Any size that grows | Remove the gallbladder | Growth is a warning in itself |
Ultrasound can read the size slightly high or low. A difference of one or two millimetres between two scans is not always real growth. This is why the same machine and the same reader matter for follow-up.
In this middle range, the risk factors decide. One clear risk factor is enough to advise surgery, while none means careful watching.
Our post on polyp or stone explains how a scan separates a polyp from a stone, since the two are managed differently.
A small polyp, with no risk factor and no symptoms, can be watched safely. Watching is a plan, not neglect.
A single polyp of 5 mm or less, with a thin wall and a stalk, is the usual example. The risk of harm is very low, and an operation carries its own small risks. Weighing the two, watching is the safer course.
Watching has rules. You need a repeat ultrasound at the time your surgeon gives you. The scan should be done with the same care each time, and the size is compared with the last report. If you skip the follow-up, the plan does not work.
Growth of 2 mm or more, a new broad base, a thicker wall, or new symptoms all end the watching and move you towards surgery.
A very small number of people have a polyp that does not grow but still looks suspicious on a special scan. Your surgeon may then add a contrast ultrasound or an MRI before deciding.
The whole gallbladder is removed by keyhole surgery. The polyp is not taken out alone, because the laboratory needs the polyp and the wall beneath it.
Most people walk on the day of surgery and go home the next day. Life without a gallbladder is normal. You can read the steps of the operation in our post on keyhole surgery for a gallbladder polyp.
The laboratory report then tells you what the polyp was. In most people it is a harmless polyp, and nothing more is needed.
Ask for the exact size, how many polyps there are, the shape of the base, and the thickness of the wall in your report.
If your report simply says “polyp seen” and you are worried, read our post on a polyp on your ultrasound for what to do next.
Most 10 mm polyps are still harmless, but it is the size at which the chance of a true growth is high enough that surgery is advised. Your scan features add to the decision.
It is very unlikely. Polyps of 5 mm or less are nearly always cholesterol bumps, and they are watched with repeat scans if there is any doubt.
Not always. Surgery is advised if you have a risk factor such as age over 60, a flat base, a thick wall or gallstones. Without these, careful watching is usual.
Your surgeon sets the gap, often every few months at first and then less often if nothing changes. Keep the same centre and the same reader if you can.
Most do not. Growth of 2 mm or more between scans is a warning, and it usually leads to advice for surgery.
No. The polyp sits on the wall, and the laboratory needs the polyp with the wall beneath it. The whole gallbladder is removed by keyhole surgery.
Yes. The liver still makes bile, and it flows to the gut. Some people have loose stools for a few weeks, and this usually settles.
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
Has a scan found a gallbladder polyp, and you are not sure what its size means for you? Dr Harsh Shah reads your report with you, checks the size against the other signs, and tells you plainly whether to watch it or remove it. Bring your ultrasound films and reports to the visit. You can also call, or message us on WhatsApp. Call +91-63555-64601 Ask on WhatsApp
Swasth Parivar: every week, practical advice on recovery, diet and warning signs. No advertising. Stop any time.
Your number is used for these updates and for the clinic to reach you. It is never sold or passed on. To stop, reply STOP on WhatsApp.