Comparison of the local control rate of patients with T-/N-residual disease in patients treated with 125I seed implantation or conventional radiotherapy. (A) The local control rate in the patients with N-residual disease. (B) The local control rate in the patients who underwent 125I particle implantation was significantly higher compared with conventional treatment (P<0.05). (C) Distant metastasis in patients with N-residual disease was significantly lower in patients undergoing 125I particle implantation compared with patients who underwent conventional treatment; (D) Distant metastasis in patients with T-residual disease. However, differences in patients with N-residual disease was not significantly different between the two groups. NR2, complete resection of primary tumor but incomplete resection of metastatic regional lymph node with macroscopic residual tumor; TR2, incomplete resection, with macroscopic residual primary tumor, but complete dissection of regional lymph node.