A 61-Year-Old Man Comes to the Physician Because of Several

A 61-year-old man comes to the physician because of several episodes of dark urine over the past 2 weeks. He does not have dysuria or flank pain. He works in a factory that produces dyes. He takes no medications. He has smoked one pack of cigarettes daily for 29 years and drinks one alcoholic beverage daily. Vital signs are within normal limits. Physical examination shows no abnormalities. His urine is pink; urinalysis shows 80 RBC/hpf but no WBCs. Which of the following is most likely to be discovered on further workup of this patient's symptoms?

A) Bladder cancer
B) Glomerulonephritis
C) Interstitial cystitis
D) Polycystic kidney disease
E) Prostate cancer
F) Staghorn calculus

Correct Answer:

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