When we injected Ad-Flt3L and Ad-TK into the tumor on day 17 (when the tumor was 1mm3 in size (Fig. 1A) we observed a robust increase in survival with 50% of mice alive 150 d later (p<0.01, Fig. 6B) that was not adversely affected by administration of rat IgG1 isotype control (p>0.05). Here, FLT3LG is linked to neoplasm.