Finally, Reolysin (5 x 108 TCID50 IV 1x per week), azacitidine (5 mg/kg SC 2x per week), and the combination were administered to mice bearing MOLM-13 FLT3-ITD+ xenografts for 19 days to assess the efficacy and tolerability of each treatment. Combination treatment was well tolerated and antagonized disease progression significantly more effectively than either monotherapy (p<0.01).