This study is a safety and feasibility study to determine if ultrasound guided radiofrequency ablation of parotid Warthin's tumor under local anesthesia is a safe and effective procedure compared to Parotidectomy while using less resources.
Radiofrequency ablation is minimally invasive and is used in benign disease, including thyroid nodules, head and neck nodules, and vascular malformations, as well as some malignant tumors. For patients unable to or unwilling to undergo surgical resection, real-time ultrasound guided radiofrequency ablation for parotid Warthin's Tumor would be a further option besides observation alone. Twenty patients with Warthin's tumor from the ENT Head and Neck Surgery out-patient clinic at Prince of Wales Hospital will be recruited. The patient will first be asked if they wanted intervention for their condition of Warthin's Tumor. Parotidectomy will first be offered. If the patient opted for intervention but declines parotidectomy, then ultrasound guided RFA will be offered. The 2019 - 2020 Parotidectomy for Warthin's tumor internal audit will be used as a historical comparison to the ultrasound guided RFA group.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
20
The Procedure 1. Injection of local subcutaneous and pericapsular anaesthesia 2. Needle radiofrequency ablation under ultrasound guidance 3. Patients should communicate with operating surgeon upon excessive heat or pain 4. The procedure usually lasts 30-45 minutes
Prince of Wales Hospital
Hong Kong, Select, Hong Kong
Volume reduction of Warthin's tumor compared to baseline
Comparison of ultrasound volumetric scan results from 45 weeks post-operative to baseline
Time frame: 1 year
Cost and resources
Total cost of the procedure including all related costs
Time frame: 1 year
Length of in-patient stay
Total number of in-patient stays recorded as number of days
Time frame: 1 week
Operating time
Time required for the procedure recorded as minutes
Time frame: 1 day
Perioperative and post-operative complications
Perioperative and post-operative complications in immediate post-operatively and during the follow-up period
Time frame: 1 year
Cosmetic score
A subjective score of cosmesis graded by the patient on a scale of 1 - 4, with the higher score having worse cosmetic outcomes
Time frame: 1 year
Visual analogue scale for pain
Collected immediately post-operatively on a scale of 1 - 10, with the higher score being more painful
Time frame: 1 day
Visual analogue scale for patient satisfaction
Subjectively graded by the patient on a scale of 1-10 for outcome satisfaction, with the higher score being more satisfactory
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Time frame: 1 year