Bladder cancer is a tumour that starts in the urothelium, the lining that covers the inside of the bladder. It is the ninth most commonly diagnosed cancer in the world, with about 614,000 new cases and 220,000 deaths recorded in 2022, and it is roughly four times more common in men than in women. Around nine in ten cases are urothelial carcinoma, the type that arises from this lining.
What matters most is depth. Around 75 per cent of bladder cancers are found while they are still confined to the lining, before they reach the muscle layer of the bladder wall. These non muscle invasive tumours are removed through the urethra without any incision in the skin, and the bladder is kept. The remaining quarter have grown into the muscle and need more decisive treatment, either removal of the bladder or bladder sparing chemoradiotherapy.
This page sets out, in plain language, how bladder cancer is recognised and staged, which treatments are used at each stage, what they cost in Istanbul, and why the follow up programme matters as much as the first operation.