Which of the following symptoms is commonly associated with bladder cancer?

Hematuria, or blood in the urine, is a key and commonly recognized symptom of bladder cancer. This occurs because the cancer can cause bleeding within the bladder, leading to blood being present when a person urinates. It is one of the most significant indicators prompting further investigation for bladder-related health issues, including cancer.

Other symptoms such as bloating, abdominal pain, and chronic cough can be associated with a variety of other medical conditions, but they do not directly indicate bladder cancer as reliably as hematuria. While abdominal pain may arise in advanced cases or due to complications, it is not a primary symptom like hematuria. Understanding these distinctions can help in recognizing the importance of symptoms specific to bladder cancer for timely diagnosis and treatment.