Urinary tract infection (UTI) is common in females. Recurrent UTI refractory to antibiotics should lead the practitioner to do further investigation in the form of imaging. Bladder stones in females are rare and the cause should be searched. Stone over foreign body in a female patient should lead a suspicion of migrated intrauterine contraceptive devices (IUCD). IUCDs are associated with many complications like perforation and migration into adjacent structures. We report a case of 40 year old female where we found that copper–T has eroded into the
bladder with formation of stone over it and partial penetration of bladder wall, many years after placement of the device and patient underwent hysterectomy before the detection of the migrated IUCD. In this case, we removed the IUCD with calculus via cystoscopic removal (cystolithotripsy).

Keywords: Intrauterine Contraceptive Device Migration; Forgotten IUCD; Urinary Bladder Stone over Foreign Body; Stone over Copper-T.