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Figure 1c. Graphs show tumor growth patterns and end-point survival in individual animals in four tumor treatment groups: (a) no treatment (controls), (b) treatment with RF ablation alone, (c) treatment with 20-Gy radiation alone, and (d) treatment with RF ablation plus 20-Gy radiation. Sacrifice was mandated at a tumor diameter of 30 mm because of animal welfare concerns. Control tumors showed the most rapid growth. Tumors treated with either RF ablation or radiation therapy alone showed a growth trend similar to that in controls but a decreased growth rate. Tumors treated with combined RF ablation and radiation therapy initially increased in size, probably because of hyperemia and edema, which were followed by tumor involution and healing in nine (82%) of 11 animals.
