<prompt> Which of the following is the most effective intravesical therapy for superficial bladder cancerMitomycinAdriamycinThiotepaBCG  <response>: Bacillus Calmette-Guerin BCG is the main intravesical immunotherapy for treating superficial bladder cancer.BCG is put directly into the bladder through a catheter. The bodys immune system cells are attracted to the bladder and activated by BCG, which in turn affects the bladder cancer cells. Treatment is usually staed a few weeks after a TURBTtrans urethral resection of bladder tumour and is given once a week for 6 weeks at a dose of 120mg in 150ml of normal saline .Reference : page 1036 SRBs manual of surgery 5th edition 