Does Bladder Cancer Spread Fast Bladder Cancer Question?

Bladder cancer question? - does bladder cancer spread fast

my friend was diagnossed with bladder cancer. He is in his 60s on dialysis, diabetes, only 1 kidney and half a pancreas. said they had a treatment that is injected into the bladder and if it spreads then they will do chemo too. What are the results for bladder cancer? Doctor told me that his aggressiveness. What speed is spread in the rule? Which treatment is known to spray in the bubble? please help in caring?