Gallstones: When Do They Actually Need Surgery?

Gallstones turn up constantly on ultrasound scans done for something else entirely. A large proportion of people carrying them will never have a symptom in their lives. So the question of when to operate is a genuine one, and it deserves a better answer than either “remove it immediately” or “just avoid oily food”.

The decision hinges almost entirely on one thing: have the stones ever caused symptoms?

Silent gallstones — the case for waiting

If gallstones are found incidentally and you have never had the characteristic pain, they are called silent or asymptomatic gallstones. Studies following such patients over many years show that only around one to two percent per year go on to develop symptoms, and most of those start with ordinary biliary colic rather than a serious complication.

For that group, watchful waiting is entirely reasonable. Surgery is not recommended purely because stones exist.

The exceptions — silent stones that should still come out

There are specific situations where surgery is advised even without symptoms, because the risk of a complication or of cancer is higher than usual.

• A porcelain (calcified) gallbladder, which carries a raised risk of gallbladder cancer
• Gallbladder polyps larger than one centimetre, or polyps that are growing
• Very large stones, generally above three centimetres
• Patients with sickle cell disease or other haemolytic conditions
• Patients awaiting an organ transplant or about to start long-term immunosuppression
• Sometimes in diabetics, who tend to develop more severe and more rapidly progressive gallbladder infections

Once you have had an attack, the calculation changes

Biliary colic is unmistakable when you have had it. A severe, gripping pain below the right ribs, often one to two hours after a rich meal, sometimes radiating to the back or right shoulder blade, lasting thirty minutes to several hours, frequently with nausea and vomiting. People describe it as the worst pain they have had.

The important statistic is what happens next. Around seventy percent of patients who have one episode of biliary colic will have another within two years. And each episode carries a risk of progressing to something worse.

This is why the standard recommendation after a first symptomatic episode is elective laparoscopic cholecystectomy — not urgently, but planned at a convenient time.

What “something worse” means

Three complications drive the recommendation to operate, and each is substantially more serious than the original colic.

• Acute cholecystitis — the gallbladder becomes infected and inflamed, causing constant pain, fever and tenderness. Needs urgent admission and usually surgery within a few days.
• Choledocholithiasis and cholangitis — a stone slips into the common bile duct, causing jaundice, dark urine and pale stools. If infection follows, cholangitis is life-threatening and needs emergency ERCP.
• Gallstone pancreatitis — a stone obstructs the pancreatic duct outlet and the pancreas becomes inflamed. This ranges from a few days in hospital to a critical illness requiring intensive care.

Why the gallbladder comes out, not just the stones

Patients frequently ask whether the stones can simply be removed and the gallbladder left in place. It is a reasonable question, and the answer is that it has been tried.

Removing stones alone leaves behind the organ whose chemistry produced them. Recurrence rates in studies of gallbladder-preserving stone removal are high, with the majority of patients re-forming stones within a few years. It converts a definitive operation into a temporary one.

The gallbladder stores and concentrates bile but does not produce it — the liver does. Removing it means bile flows continuously into the intestine rather than being released in a bolus after meals. Most people notice no difference whatsoever.

What about dissolving stones with medication?

Ursodeoxycholic acid can dissolve small, purely cholesterol stones in a gallbladder that still functions well. In practice its role is very limited.

Treatment takes a year or more, works only for a minority of stone types, and stones recur in most patients once the medication stops. It is occasionally useful for someone genuinely unfit for surgery, but it is not a realistic alternative for a patient who has had symptoms.

The practical bottom line

If your gallstones were found by chance and have never hurt you, you generally do not need an operation. Eat sensibly, and know the symptoms to watch for.

If you have had even one clear episode of biliary colic, the sensible course is a planned laparoscopic cholecystectomy at a time that suits you — a day in hospital, four small incisions, back at desk work in about a week.

And if you develop pain with fever, jaundice or pain going through to the back, that is not something to schedule. That needs assessment the same day.