My 55 year old brother has metastatic bladder cancer. what can you tell me about this cancer?

Rephrase question...: What do you want to know? That's a really open-ended question. Etiology, risk factors, grading, staging, treatments, experimental protocols, prognosis? You've got internet access. There are a lot of great review articles out there. Don't use sources more than 2-5 yrs old. It's aggressive. Keep in touch with your brother, whose docs will keep him informed regarding his unique clinical situation.