Gallbladder surgery in South Korea: what the evidence says about who gets operated on, how safely, and what happens next

Cholecystectomy is one of the most common operations performed in South Korea, and one of the least examined in public. This article collects what the published evidence establishes about it, links to our reporting on each part, and is explicit about the places where the question a patient is actually asking has no Korean answer yet.

How many, and why the number moved#

Between 2003 and 2017 the age-standardised rate of cholecystectomy in Korea rose from 67.7 to 211.4 per 100,000 — more than tripling in fifteen years, after adjusting away the effect of an ageing population. The authors of that nationwide claims study identify increasing use of computed tomography as a probable primary cause: a scan ordered for something else finds a stone, and a recorded finding is difficult to leave alone.

What that trend cannot show is whether the additional operations were necessary. Insurance claims do not record whether a patient had symptoms, so the data establishes that Korea operates far more often than it did and stops there.

Who needs an operation#

For gallstones that have never caused symptoms, the pooled evidence is reassuring: about 10 percent become symptomatic within five years, 19 percent within ten and 26 percent within fifteen, and the authors of that meta-analysis recommend conservative management for most patients.

For gallbladder polyps, Korea is deliberately out of step with Europe. The Korean Society of Abdominal Radiology moved the size at which surgery is firmly recommended from 10 mm to 15 mm in January 2025; the European joint guideline still recommends surgery at 10 mm, and radiologists in Beijing challenged the Korean change in print within eight weeks.

When the gallbladder is acutely inflamed#

The Tokyo Guidelines 2018, whose authors include Korean hepatobiliary surgeons, recommend early laparoscopic cholecystectomy for grade I and grade II disease in patients whose comorbidity and anaesthetic risk are within defined limits, reserving drainage for those outside them. The guideline also abandoned the older 72-hour window; early now means within seven days.

Korean practice frequently drains first. Matched Korean series find that this costs about a week of hospital stay and roughly doubles intensive care admission without reducing complications — and that the delay which independently predicted harm was the patient's own, not the surgeon's: presenting more than four days after symptoms began tripled the odds of a postoperative complication.

How safe the operation is#

The Korean number comes from a prospective study across 18 academic institutions: of 2,514 patients, 62 (2.5 percent) had a surgery-related complication and 17 (0.7 percent) sustained a bile duct injury. That figure is reassuring in aggregate and severe in the individual case — an Irish national cohort of patients who needed surgery for such an injury reported reconstruction in 76 percent, reoperation in 29 percent, one liver transplant and three deaths.

When a gallbladder cannot be safely removed whole, surgeons increasingly leave part of it behind rather than converting to open surgery. That substitution is well justified — bile duct injury in 0.3 percent — and is not free: overall complications of 24.7 percent, readmission of 17.8 percent, and one patient in six returning for an endoscopic procedure.

Whether the robot is safer than the laparoscope is genuinely unresolved. Two meta-analyses published weeks apart reached opposite conclusions on bile duct injury, and the larger one's confidence interval is wide enough to contain the other's estimate — an imprecise result rather than a reassuring one.

What happens afterwards#

The liver keeps producing bile; what changes is that it drains continuously instead of being stored and released after meals. Roughly one patient in eight develops diarrhoea, and about 3 percent have persistent abdominal symptoms, most strongly predicted by having had symptoms before the operation.

Korea's national insurance database has generated a series of studies reporting higher rates of later diagnoses after cholecystectomy — cancer, type 2 diabetes, chronic kidney disease, depression. The largest, comparing 715,872 operated patients against 1,431,728 matched controls, found the excess concentrated one to three years after surgery and back to the control level after five to ten. A cause working through altered bile physiology would accumulate rather than fade, and its authors titled the paper increased diagnosis rather than increased incidence.

Where the Korean evidence runs out#

1. No published Korean series reports conversion or subtotal cholecystectomy outcomes at national scale, so those figures in our reporting are Irish, Chilean, American and European and are labelled as such.
2. The Korean bile duct injury rate of 0.7 percent comes from 18 academic institutions. Smaller hospitals are not represented and there is no basis for assuming the rate is the same there.
3. The Korean risk calculator built on that cohort rests on 17 injury events and has been developed rather than validated in an independent population.
4. Whether Korea's tripled operating rate reflects more disease, more detection, or more intervention on incidental findings is not answerable from claims data, which does not record whether a patient had symptoms.