What is the most common presenting symptom of bladder cancer in adults and a major risk factor?

• A. Dysuria, frequency, urgency; diabetes
• B. Painless gross hematuria; smoking.
• C. Polyuria; dehydration.
• D. Urinary retention; obesity.

Answer: (B)

Painless gross hematuria is the hallmark presentation. Bladder cancers often bleed into the urine, and this bleeding is typically painless, making visible blood in the urine the most common presenting sign in adults. The major risk factor is smoking, because tobacco carcinogens are filtered and excreted in urine, exposing the bladder lining to cancer-causing substances over time; risk rises with the amount and duration of smoking. By contrast, dysuria, frequency, and urgency are more typical of infections or irritation, polyuria suggests diabetes or dehydration, and urinary retention is linked to obstruction or other conditions, not the classic presentation of bladder cancer.