Do not remove a gallbladder preventively just because a scan finds stones that have never caused symptoms
Most people with symptom-free gallbladder stones remain symptom-free over the periods studied. In Italy, 78% of 580 people had no symptoms over nearly nine years. In a US group of 135 people followed for about four years, only 7% underwent surgery. UK guidance says that incidentally discovered stones in an otherwise normal gallbladder and biliary tree do not need treatment unless symptoms develop.
What it takes
You avoid general anesthesia, surgery, and a hospital admission. In return, you need to recognize symptoms that require prompt medical care.
What you may gain
The Italian MICOL population survey performed ultrasound in 11,229 people aged 29–69. It identified 856 people with gallstones, including 580 without symptoms, followed for an average of 8.7 years. Of those 580, 453 (78.1%) remained asymptomatic, 61 (10.5%) developed mild symptoms, and 66 (11.4%) developed severe symptoms. There were 189 cholecystectomies during follow-up, 41.3% in people without symptoms. The authors concluded that expectant management—observing rather than operating—remained appropriate for most patients. A US health-maintenance organization, a type of managed-care organization, followed 691 people with diagnosed gallstones for 78±61.6 months on average. Its 135 asymptomatic patients were followed for 58±50.2 months, median 46.3 months; 10% developed symptoms and 7% underwent surgery. Of 50 deaths in the full cohort, only two were biliary-related, both in the symptomatic group. The authors concluded that silent stones did not require surgery before symptoms developed. NICE guideline CG188, recommendation 1.2.1, advises reassurance that incidentally found asymptomatic gallbladder stones in a normal gallbladder and biliary tree need no treatment until symptoms occur. Preventive surgery appeals to the assumption that pain is inevitable and one might as well have the operation while young.
Context & considerations
This applies specifically to stones in the gallbladder that have never caused symptoms. Common bile duct stones are different. NICE recommendation 1.3.1 advises clearing those stones and removing the gallbladder whether or not symptoms are present. Seek same-day care for persistent colicky pain in the right upper or upper abdomen, fever or chills, yellow eyes or skin, or dark urine. If a clinician recommends surgery after reviewing imaging, ask about the reason—duct involvement, a coexisting polyp, or an abnormal gallbladder wall, for example. Do not use this entry to dismiss a specific indication; it argues against operating solely because a stone was found. Both cited studies are observational cohorts, but they address the natural-history question, “What happens if we leave this alone?”, for which that design is appropriate. Their follow-up lasted about four to nine years; the proportion developing symptoms rises with longer observation.
Research & references
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 CG188, recommendations 1.2.1 and 1.3.1. https://www.nice.org.uk/guidance/cg188/chapter/Recommendations.