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A 55-year-old man comes to the physician because of two episodes of painless, blood-tinged urine during the past week. His last episode was 2 days ago. He has smoked 1 pack of cigarettes daily for 35 years. Vital signs are within normal limits. Physical examination shows no abnormalities. Urinalysis shows normal findings except for microscopic blood.
1. Bladder cancer
2. Bladder diverticulum
3. Interstitial cystitis
4. Nephrolithiasis
5. Urinary tract infection