Introduction: Approximately 5% of bladder stones occur in women and are usually associated with foreign bodies or urinary stasis. Spontaneous migration of the intrauterine device (IUD) into the bladder is a rare complication. In this report, we present 2 cases of migrated IUD who had undergone surgery at our clinic due to bladder stones. Case Presentations: We detected migrated IUDs into the bladder in 2 female patients, aged 37 and 56 years, who presented with lower urinary tract symptoms and urinary tract infection. In the first case, endoscopic cystolithotripsy was performed, and the IUD was removed without complications. In the second case, the IUD could not be removed endoscopically since it had fractionally invaded the bladder wall, and the IUD was removed without complications by performing an open cystolithotomy. Conclusion: A comprehensive gynecological history should be taken from every female patient presenting with recurrent urinary tract infections and lower urinary tract symptoms. If these patients have a history of IUD placement, the possibility of the intravesical migration of this device should be kept in mind.

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