Buongiorno, Stephano!
Welcome to our Forum. I am sorry to hear about your father's diagnosis. But there is good news....it is very treatable. I was diagnosed with CIS eight years ago, had treatment, and now have no sign of bladder cancer.
I do not know what the treatment practices are in Italy, so I will describe what is done here in the US. The treatment of choice here is BCG. This is a modified tuberculosis bacterium that is placed in solution and the bladder is washed with this. This is usually done once a week for six weeks; then once a week for three weeks every three months until two years have passed. This has been shown to be very effective in treating CIS. While there are often some side effects, mostly fatigue and burning with urination, it is very tolerable.
Wishing your father the very best
Sara Anne
