Don’t undergo preventive gallbladder removal just because an ultrasound reveals gallstones but you’ve never had any pain

There’s no cost at all — in fact, you avoid the expense of a full general anesthesia and a hospital stay. The trade‑off is simply remembering a few warning signs that demand immediate medical attention.

The Italian MICOL population survey examined 11,229 people aged 29–69 using ultrasound. Gallstones were detected in 856 individuals; 580 of them had no symptoms and were followed for an average of 8.7 years. Of those, 453 (78.1 %) remained symptom‑free, 61 (10.5 %) experienced mild symptoms, and 66 (11.4 %) had severe symptoms. Over the follow‑up period, 189 gallbladder removals were performed, with 41.3 % done on asymptomatic patients. The authors conclude that “watchful waiting remains an effective approach for most patients.” In the U.S., a health‑maintenance organization tracked 691 gallstone patients for an average of 78 ± 61.6 months; among the 135 asymptomatic participants followed for 58 ± 50.2 months (median 46.3 months), only 10 % developed symptoms and 7 % underwent surgery. Of the 50 deaths recorded in the whole group, just two were linked to biliary disease, and both occurred in symptomatic patients. The authors stress that “patients with silent stones need not have surgery before symptoms appear.” The UK’s NICE guideline CG188, section 1.2.1, states: “Individuals with normal gallbladder and biliary anatomy who incidentally have asymptomatic gallstones should be informed that no treatment is necessary before symptoms arise.” The apparent cost‑effectiveness of preventive removal stems from the intuition that “pain will eventually appear, so it’s better to remove it while still young.”

Festi D, Reggiani ML, Attili AF, et al. (2010). Natural history of gallstone disease: Expectant management or active treatment? Results from a population-based cohort study. Journal of Gastroenterology and Hepatology, 25(4), 719-724. https://doi.org/10.1111/j.1440-1746.2009.06146.x；McSherry CK, Ferstenberg H, Calhoun WF, Lahman E, Virshup M (1985). The natural history of diagnosed gallstone disease in symptomatic and asymptomatic patients. Annals of Surgery, 202(1), 59-63. https://doi.org/10.1097/00000658-198507000-00009；National Institute for Health and Care Excellence (2014). Gallstone disease: diagnosis and management. NICE guideline CG188，第 1.2.1、1.3.1 条. https://www.nice.org.uk/guidance/cg188/chapter/Recommendations

This recommendation applies only to one specific scenario: stones located inside the gallbladder with no prior pain. Stones in the common bile duct are a completely different matter. Section 1.3.1 of the same guideline explicitly mandates removal of bile‑duct stones — symptomatic or not — along with gallbladder extraction. Seek emergency care immediately if you experience persistent cramping in the upper right abdomen, fever with chills, yellowing of the whites of the eyes or skin, or dark urine. When a physician recommends surgery after reviewing imaging, ask which criteria prompted that decision — such as bile‑duct involvement, concurrent polyps, or abnormal gallbladder wall changes — and do not cite this guideline to contest it. This advice solely prevents “unjustified removal solely because stones were detected.” Both studies described above were observational cohorts, not randomized trials; they aimed to answer “what happens if we do nothing?” rather than “which treatment is superior?” Their findings are therefore appropriate here. Moreover, the follow‑up periods were 4–9 years; longer observation would likely raise the proportion of symptomatic cases.