I can only tell my own story. When I was diagnosed with Stage 1 and a big tumor, I asked my doctor how long I would have if left untreated. He said probably about 18 months. (I would be gone by now.) But, again, that was Stage 1. I can't say how long I would have had if my cancer had spread.
Peace to your mother and your family - and to you.
08/16/16 - TURBT - 1 tumor, T1HG, 7.5 cm x 7.5 cm x 1.8 cm, non-invasive papillary.
BCG treatments (15 doses total - last March, 2018). As of latest cysto, As of May 4, 2023 - cancer free!