At this time there is no definitive test for bladder cancer. The ones that are on the market are not used as in home tests and are most affective when used paired with cystoscopy and other tests and procedures.
Your family members best bet is to be conscientious about adhering to their Urologists suggested time table for check ups.
T2 g3 CIS 8/04
Chemotherapy & Radiation 10/04-12/04
RC w/umbilical Indiana pouch 5/06
Left Nephrectomy 1/09
President American Bladder Cancer Society