More info: Interstitial bladder cancer was found about 3 years ago. Husband had 2 six week BCG (Bacille Calmette Guerron) treatments. Then 4 three week sessions. This was over a period of 3 years. He was followed up with cystoscopies and the last one involved a biopsy. Biopsy showed Stage 2 muscle invasive bladder cancer. So then we went to the Mayo Clinic in Phoenix. Started and completed chemo in Tucson, but followed by Mayo.