Differential diagnosis of intra-uterine device migrating to bladder using radiographic image of calculus formation and review of literature.

A 28-year-old woman in whom a copper-T 280-A intra-uterine device (IUD) had been placed 6 months previously, presented complaining of urinary system infection and lower abdominal pain. Intra-vesical migration of IUD was confirmed by radiography and cystoscopy. Since 1966, 17 other cases of calculus formation among 41 cases of intra-vesical migration have been reported.