Bladder cancer starts in the cells of the bladder. The bladder is an integral part of the urinary system – it is a hollow organ in the pelvis which stores urine before it is eliminated from the body. Nearly all of these cancers start in the lining of the bladder, and are called urothelial carcinomas. These are often diagnosed at an early stage, before they have grown into the muscle wall of the bladder and become invasive (1).
There are about 9 000 Canadians diagnosed with bladder cancer annually, making it the 5th most common cancer in Canada (2).
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(1) “What is bladder cancer”, Canadian Cancer Society, n.d. http://www.cancer.ca/en/cancer-information/cancer-type/bladder/bladder-cancer/
(2) “Bladder cancer facts”, Bladder Cancer Canada, n.d. https://bladdercancercanada.org/en/bladder-cancer-facts/