Methods 136 cases of asymptomatic cholecystolithiasis, found on health check up, were randomly divided into two groups :(1) Preventive cholecystectomy group,66 cases;

• 方法将健康体检中发现的无临床症状胆囊结石136例,前瞻性非随机分为2组:(1)预防胆囊切除组66例;