Suggest Treatment For Trabeculated Bladder

I am a 65 y.o. male, recently diagnosed w/ severe bladder trabeculation. Dr. said I have the bladder of an 85 y.o. From the verumontanum he could slmost see up into the bladder. There was not a significant amount of prostate obtructing tissue. He put me on Flomax. MY QUESTION: How serious is this condition? What if anything should I be doing? What are my risks and future having the bladder of an 85 y.o. when I am only 65 y.o.?