What is the most common sign of bladder cancer?

The most common sign of bladder cancer is gross hematuria, which refers to the presence of visible blood in the urine. This symptom is significant because it often prompts patients to seek medical attention, leading to further diagnostic evaluation for potential underlying causes, including bladder cancer. Gross hematuria is reported in a substantial percentage of patients with bladder cancer, making it a hallmark symptom that should raise suspicion for the disease.

While urinary urgency, frequency of urination, and pelvic pain can occur due to a variety of urinary tract conditions, including benign ones, they are not as strongly associated with bladder cancer as gross hematuria. Therefore, the identification of visible blood in the urine stands out as a critical warning sign that necessitates investigation for possible malignancy.