Fig. 1From: A large bladder stone caused by the intravesical migration of an intrauterine contraceptive device: a case reportPlain radiographs. a The imprint of the intrauterine contraceptive device is seen in the center of the stone. b A magnified view of the X-ray showing the characteristic laminated appearance of the stone due to the concentric layers of stone material deposited around the intrauterine contraceptive device (*)Back to article page