NCT04522570

Thermal Ablation of Cervical Metastases From Thyroid Carcinoma

Ultrasound Guided Percutaneous Thermal Ablation of Cervical Metastases From Thyroid Carcinoma

• Status: Active Not Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 84 (actual)
• Sponsor: Instituto do Cancer do Estado de São Paulo · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This study will evaluate the clinical response and safety of ultrasound guided percutaneous thermal ablation of lymph node metastases from thyroid carcinoma as an alternative to surgical treatment. The ablation of cervical lymph node metastases from differentiated thyroid carcinoma or medullary thyroid carcinoma will be directed to lesions larger than 0.8 cm, using ultrasound-guided radiofrequency ablation (RFA), laser ablation (LA) or cryoablation (Cryo) techniques, randomly assigned. Clinical and ultrasound monitoring will be carried out during 24 months, with examinations before the ablation procedure, immediately after including contrast-enhanced ultrasound (CEUS) when applicable, and B-mode, color Doppler and Shear-Wave elastography ultrasound follow up with 6, 12, and 24 months.

Detailed description

Thyroidectomy is the main treatment of well differentiated thyroid carcinoma. Residual or recurrent cervical metastases are common (9-20% of patients during long-term follow up). Thermal ablation of cervical metastatic lymph nodes from thyroid carcinoma has been proposed in research centers as an option for the treatment of patients who remain with metastatic disease in cervical lymph nodes, despite thyroidectomy with or without neck dissection associated with radioiodine treatment. Potential advantages from percutaneous thermal ablation are related to less complication rates, less morbidity, possibility of outpatient treatment modality, and less global treatment costs when compared to the surgical approach. Aims of the study: 1. To evaluate safety and efficacy of ultrasound-guided thermal ablation in the treatment of cervical lymph node metastases from differentiated thyroid carcinoma 2. To evaluate the best response to thermal ablation defined as lymph node reduction or volume stability after ablation 3. To evaluate the CEUS patterns of lymph nodes before and after ablation 4. To evaluate the elastography patterns of lymph nodes before and after ablation 5. To evaluate the tumor marker response after ablation 6. To evaluate the contribution of thermal ablation to decrease additional therapeutic procedures 7. To compare differences between LA, RFA and cryoablation in terms of complications, side effects and tolerability Patients with cervical metastatic lymph nodes from differentiated thyroid carcinoma or medullary thyroid carcinoma who meet the eligibility criteria and who have been determined to be an appropriate candidate for local ablation therapy will be offered enrollment into the study. Patients agreeing to participate will become subjects of the study if they read and sign an informed consent form. Treatment will be performed using three different ablation technologies (laser ablation, RFA or cryoablation) in a randomly assignment fashion. Subjects will have up to six simultaneous treated lesions larger than 0.8 cm diameter with positive fine-needle aspiration biopsy. Ultrasound (and CEUS when applicable) will be performed over 24 months follow up in order to evaluate efficacy. Baseline and follow-up data will be collected for each subject via a web-based electronic data collection tool. In case of recurrent disease treated by any ablative technique in patients who did not undergo previous neck dissection, a rescue neck dissection will be performed; in case of recurrent disease treated by any ablative technique in patients who underwent previous neck dissection, a new ablative technique approach will be considered.

Conditions

• Thyroid Neoplasia
• Well-Differentiated Thyroid Cancer
• Medullary Thyroid Cancer
• Lymph Node Metastases

Interventions

Type	Name	Description
DEVICE	Laser ablation	Single session with Diode laser ablation system; one or two applicators will be used for treatments; one to three illuminations; fixed output power of 3 watts (W); pullback technique; delivered energy: 1200-1800 Joules (J) varying according to tumor volume; treatment under local anesthesia +- conscious or moderate sedation;
DEVICE	Cryoablation	Single session with Argon-based cryoablation system; one 17 Gauge (G) V-probe applicator will be used for treatments; fixed gas delivery of 100%; treatment under local anesthesia +- conscious or moderate sedation;
DEVICE	Radiofrequency ablation	Single session with radiofrequency generator; one 17 Gauge (G) V-tip applicator with a 1 to 4cm active tip; moving-shot technique or multiple overlapping shot technique with 60 Watts (W) output power; treatment under local anesthesia +- conscious or moderate sedation;

Timeline

• Start date: 2020-12-14
• Primary completion: 2026-11-30
• Completion: 2026-11-30
• First posted: 2020-08-21
• Last updated: 2025-04-30

Locations

1 site across 1 country: Brazil

Regulatory

• FDA-regulated device study