How effective is fluorouracil (efudex) for treating basal cell cancer?

Very: The majority of small and even intermediate basal cell cancers can be cured by applying EFUDEX (fluorouracil). The resulting erythema is secondary to destruction of local suppressor cells in the tumor field and influx of effector cells to destroy the tumor. The EFUDEX (fluorouracil) is applied locally for 10 days followed by 10 days of A&D ointment May repeat if needed.