title: Unusual bladder stone.
mesh_terms: D003275:Contraceptive Devices, Male / Q000009:adverse effects*; D005547:Foreign Bodies / Q000150:complications*; D005548:Foreign-Body Migration / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D001744:Urinary Bladder Calculi / Q000209:etiology*