Migration of an intrauterine contraceptive device to the urinary bladder: sonographic findings.

Migration of an intrauterine contraceptive device (IUD) to the urinary bladder is very rare. We describe a case in which transabdominal sonography demonstrated such migration of an IUD in a 30-year-old woman who sought treatment for pelvic pain and dysuria. The IUD had originally been inserted 10 years earlier, and the patient had given birth without complications 2 years before the onset of her symptoms. Cytoscopic examination confirmed the diagnosis and allowed removal of the IUD.