目的:分析宫内节育环异位至膀胱并形成结石的机制,探讨其诊断、治疗及预防措施。方法:回顾性分析3例节育环异位至膀胱并形成结石患者的临床资料:诊断主要依据病史、B超、骨盆平片、CT、MRI及膀胱镜检查。1例通过内镜碎石取环,2例开放手术取石取环。结果:3例均成功碎石取环。术后恢复良好,随访3~6个月未出现尿漏等并发症。结论:本病重在预防;内镜为其首选治疗方法。 Objective: To analyze the mechanism of ectopic pregnancy to the bladder and the formation of stones, and to explore its diagnosis, treatment and preventive measures. Methods: The clinical data of 3 patients with ectopic pregnancy to bladder and stone formation were retrospectively analyzed. The diagnosis was mainly based on history, B-, pelvic radiography, CT, MRI and cystoscopy. One case was grafted by endoscopic gravel, and two cases were opened by stone surgery. Results: Three cases were successful gravel ring. Postoperative recovery was good, follow-up 3-6 months did not appear complications such as urine leakage. Conclusion: The disease is important in prevention. Endoscopy is the first choice of treatment.