| http://www.w3.org/ns/prov#value | - When bladder cancer reaches the invasive stage, which Kibel estimates occurs in one in five bladder cancer cases, the cancer has made its way into the muscle of the bladder. ???This is the point where you feel it,??? notes Kibel, referring to the fact that in the superficial stage, people may see blood in their urine but probably do not have any other symptoms, such as pain or difficulty urinating
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