Plasma Radiofrequency Ablation at Low Temperature Versus Electrocautery Block Resection at High Frequency for Localized Recurrent Nasopharyngeal Carcinoma

Inclusion Criteria:

1. At least 6 months disease free interval (defined as duration between the initialcourse of radiotherapy and recurrence)

2. Histopathologically diagnosed with undifferentiated or differentiated, nonkeratinizingnasopharyngeal carcinoma.

3. Resectable recurrent nasopharyngeal carcinoma: A) recurrent T1N0M0 according to the American Joint Committee on Cancer (AJCC) 8thstaging B) recurrent T2N0M0(the tumor was confined to the surface of theparapharyngeal space and was more than 0.5cm away from the internal carotid artery)according to the American Joint Committee on Cancer (AJCC) 8th staging

4. Age: 18-70 years old.

5. Subjects must sign an informed consent form.

Exclusion Criteria:

1. Karnofsky score (KPS)≤70.

2. Has known Subjects with other malignant tumors.

3. Has seriously mental disease.

4. Uncontrolled clinically significant heart disease and Pulmonary dysfunction.

5. Pregnancy or breast feeding.