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[Mechanism of preventing the recurrence of bladder carcinoma by intravesical instillation of BCG plus IL-2].

OBJECTIVE
To study the mechanism of preventing the recurrence of bladder carcinoma by intravesical instillation of BCG plus IL-2.


METHOD
Intravesical instillation of BCG or BCG plus IL-2 were carried out in the bladder transitional cell carcinoma patients undergoing surgical operation (16, 19 cases respectively).


RESULT
They were followed up for 14-22 months. The recurrence rates were 31.25% and 21.05% respectively. At 6 weeks after the instillation of IL-2 plus BCG, the peripheral blood NKCF activity was increased significantly and there was a significant positive correlation between the activities of NKCF and IL-2.


CONCLUSION
The intravesical instillation of IL-2 plus BCG is clearly superior to only BCG in preventing recurrence of bladder carcinoma. There may be immuno-enhancement and immuno-synergism.