Thyroid NeoplasiaNCT04522570
Thermal Ablation of Cervical Metastases From Thyroid Carcinoma
A study testing Laser ablation, Cryoablation and Radiofrequency ablation in people with Thyroid Neoplasia and Well-Differentiated Thyroid Cancer, run by Instituto do Cancer do Estado de São Paulo at 1 site in Brazil.
Trial 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. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Thyroid Neoplasia, Well-Differentiated Thyroid Cancer, Medullary Thyroid Cancer
- What is being tested?
- Laser ablation, Cryoablation and Radiofrequency ablation
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 84 participants
- Where
- 1 siteBrazil
- Study dates
- 22 Dec 2020to 22 Dec 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- 18 years of age or older
- Patients with fine needle aspiration biopsy (FNAb)-proven metastatic cervical lymph nodes at levels I, II, III, IV, V, VI or VII from differentiated thyroid carcinoma or medullary thyroid carcinoma who underwent total thyroidectomy and subsequent radioiodine therapy, in case of differentiated thyroid carcinoma.
- Patients considered high surgical risk candidate or patients who are informed about the ablation therapy and prefers it instead surgery;
- Patients with metastatic cervical lymph nodes over 0.8 cm diameter and under 4.0 cm diameter; no more than 6 simultaneous cervical nodal metastases;
- Cervical recurrences in previously lateral neck dissection patients for differentiated thyroid carcinoma or medullary thyroid carcinoma over 0.8 cm diameter.
Who cannot join
- Age under 18 years
- Uncorrectable coagulopathy;
- Inconclusive or benign cytologic specimens;
- Pregnancy or breast-feeding;
- Anaplastic or poor-differentiated thyroid carcinoma;
- Partial thyroidectomy
Show all 9Show fewer
- Cervical tumors not considered to surgery (invading vessels, nerves, larynx or trachea);
- Serious medical illness, including any of the following: uncontrolled angina, myocardial infarction, cerebrovascular event within 6 months prior to the baseline visit, uncontrolled congestive heart failure;
- Participation in other studies that could affect the primary endpoint
Trial locations and contacts
1 site in 1 country.
Brazil1 site
Instituto do Cancer do Estado de São Paulo
São Paulo, São Paulo, 01246000
About this study
Official title: Ultrasound Guided Percutaneous Thermal Ablation of Cervical Metastases From Thyroid Carcinoma
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.
Read the 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:
- To evaluate safety and efficacy of ultrasound-guided thermal ablation in the treatment of cervical lymph node metastases from differentiated thyroid carcinoma
- To evaluate the best response to thermal ablation defined as lymph node reduction or volume stability after ablation
- To evaluate the CEUS patterns of lymph nodes before and after ablation
- To evaluate the elastography patterns of lymph nodes before and after ablation
- To evaluate the tumor marker response after ablation
- To evaluate the contribution of thermal ablation to decrease additional therapeutic procedures
- 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
- Being tested
- Laser ablation, Cryoablation, Radiofrequency ablation
- Keywords
- differentiated thyroid cancer, medullary thyroid cancer, cervical lymph nodes, contrast-enhanced ultrasound, thermal ablation, laser ablation, radiofrequency ablation, cryoablation, elastography
- Medical subject headings
- Thyroid Neoplasms, Carcinoma, Medullary, Lymphatic Metastasis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Laser ablationDevice
Also called LA
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;
CryoablationDevice
Also called Cryo
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;
Radiofrequency ablationDevice
Also called RFA
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;
| Study group | Role | What they receive |
|---|---|---|
| laser ablation | Active comparator | Percutaneous Laser Ablation for the treatment of metastatic cervical lymph nodes with > 0.8 cm diameter with biopsy-proven diagnosis of differentiated thyroid carcinoma or medullary thyroid carcinoma. Receives: Device: Laser ablation |
| cryoablation | Active comparator | Percutaneous cryoablation for the treatment of metastatic cervical lymph nodes with > 0.8 cm diameter with biopsy-proven diagnosis of differentiated thyroid carcinoma or medullary thyroid carcinoma. Receives: Device: Cryoablation |
| Radiofrequency ablation | Active comparator | Percutaneous radio frequency ablation for the treatment of metastatic cervical lymph nodes with > 0.8 cm diameter with biopsy-proven diagnosis of differentiated thyroid carcinoma or medullary thyroid carcinoma. Receives: Device: Radiofrequency ablation |
What is being measured
The primary outcome is the main question the study is designed to answer.
Evaluation of technical feasibility
defined as the ability to target the nodule and to perform ablation as preoperatively planned
Measured: immediately after the procedure
Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability] of thermal ablation of thyroid carcinoma cervical lymph node metastases
Evaluation of minor and major complication rates, immediately after ablation; and one- and four-weeks post-ablation by telephone call.
Minor and major complication rates [Designed as a safety issue: Yes]. The safety endpoint for this study is to assess the incidence and severity of procedure or device-related adverse events, as reported by the Common Terminology Criteria of Adverse Events - CTCAE V5. 2017 Version.
Measured: up to 4 weeks post-ablation
Secondary outcomes (7)
Evaluation of technical success
Defined as the complete absence of color Doppler or, if applicable when tumors over 1.0 cm diameter, enhancement by contrast-enhanced ultrasound in the treated nodule
Measured: immediately after the procedure
Evaluation of contrast-enhanced ultrasound pattern after thermal ablation therapy
Absence of enhancement is expected in treated cervical lymph nodes after local ablative therapy in comparison to pre-treatment enhancement pattern. Partial enhancement may indicate residual tumoral tissue requiring new ablation session
Measured: 12 months
Evaluation of elastography pattern after thermal ablation therapy
Quantitative measurements of nodule stiffness designated by the most representative region of interest within the nodule estimating of Young's modulus in kilopascal (KPa) and shear wave velocity in centimetres per second (cm/s) of treated cervical lymph nodes after local ablative therapy in comparison to pre-treatment pattern.
Measured: 24 months
Best response to the thermal ablation therapy
The best response is defined as a subject having local disease control related to lymph node volume reduction or volume stability in percentage will be assessed by ultrasound measurement in comparison to pre-treatment volume.
Measured: 24 months
Evaluation of tumor marker response
Number of patients with tumor marker response: defined in negative thyroglobulin, calcitonin, or carcinoembryonic antigen (CEA) levels or anti-thyroglobulin antibodies
Measured: 24 months
Evaluation of additional therapies
Number of patients with additional therapies: Additional therapies for persistent/recurrent local disease associated with the index tumor (s) under study or new cervical lymph node metastases.
Measured: 24 months
Outcomes among thermal ablation therapies
Number of patients with complications, side effects and tolerability in each ablation technique.
Measured: 24 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted21 Aug 2020
- Study start22 Dec 2020
- Primary completion22 Dec 2025
- Study completion22 Dec 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (9)Papers the sponsor has linked to this study.
- Other trials for Thyroid NeoplasiaStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 84 participants (actual)
Sponsor and investigators
- Lead sponsor
- Instituto do Cancer do Estado de São Paulo
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Ricardo MC Freitas, PhD, Principal investigator, Instituto do Cancer do Estado de São Paulo
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04522570
- Sponsor's protocol ID
- 1255/18
- Status last verified
- Sep 2026
- First submitted
- 10 Aug 2020
- Last updated
- 22 Sep 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- Yes
- Individual data sharing
- Yes: De-identified individual participant data for all primary and secondary outcomes measures will be made available.
Publications
Hong YR, Luo ZY, Mo GQ, Wang P, Ye Q, Huang PT. Role of Contrast-Enhanced Ultrasound in the Pre-operative Diagnosis of Cervical Lymph Node Metastasis in Patients with Papillary Thyroid Carcinoma. Ultrasound Med Biol. 2017 Nov;43(11):2567-2575. doi: 10.1016/j.ultrasmedbio.2017.07.010. Epub 2017 Aug 12.
PubMed 28807450Guenette JP, Tuncali K, Himes N, Shyn PB, Lee TC. Percutaneous Image-Guided Cryoablation of Head and Neck Tumors for Local Control, Preservation of Functional Status, and Pain Relief. AJR Am J Roentgenol. 2017 Feb;208(2):453-458. doi: 10.2214/AJR.16.16446. Epub 2016 Nov 15.
PubMed 27845860Guang Y, Luo Y, Zhang Y, Zhang M, Li N, Zhang Y, Tang J. Efficacy and safety of percutaneous ultrasound guided radiofrequency ablation for treating cervical metastatic lymph nodes from papillary thyroid carcinoma. J Cancer Res Clin Oncol. 2017 Aug;143(8):1555-1562. doi: 10.1007/s00432-017-2386-6. Epub 2017 Mar 24.
PubMed 28342000Wang L, Ge M, Xu D, Chen L, Qian C, Shi K, Liu J, Chen Y. Ultrasonography-guided percutaneous radiofrequency ablation for cervical lymph node metastasis from thyroid carcinoma. J Cancer Res Ther. 2014 Nov;10 Suppl:C144-9. doi: 10.4103/0973-1482.145844.
PubMed 25450273Mauri G, Cova L, Ierace T, Baroli A, Di Mauro E, Pacella CM, Goldberg SN, Solbiati L. Treatment of Metastatic Lymph Nodes in the Neck from Papillary Thyroid Carcinoma with Percutaneous Laser Ablation. Cardiovasc Intervent Radiol. 2016 Jul;39(7):1023-30. doi: 10.1007/s00270-016-1313-6. Epub 2016 Feb 24.
PubMed 26911732Papini E, Bizzarri G, Bianchini A, Valle D, Misischi I, Guglielmi R, Salvatori M, Solbiati L, Crescenzi A, Pacella CM, Gharib H. Percutaneous ultrasound-guided laser ablation is effective for treating selected nodal metastases in papillary thyroid cancer. J Clin Endocrinol Metab. 2013 Jan;98(1):E92-7. doi: 10.1210/jc.2012-2991. Epub 2012 Nov 12.
PubMed 23150695Baudin E, Schlumberger M. New therapeutic approaches for metastatic thyroid carcinoma. Lancet Oncol. 2007 Feb;8(2):148-56. doi: 10.1016/S1470-2045(07)70034-7.
PubMed 17267329Monaco F. Classification of thyroid diseases: suggestions for a revision. J Clin Endocrinol Metab. 2003 Apr;88(4):1428-32. doi: 10.1210/jc.2002-021260. No abstract available.
PubMed 12679417Hegedus L. Clinical practice. The thyroid nodule. N Engl J Med. 2004 Oct 21;351(17):1764-71. doi: 10.1056/NEJMcp031436. No abstract available.
PubMed 15496625
Study at a glance
From the registry record, last updated by the sponsor on 22 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Ultrasound Guided Percutaneous Thermal Ablation of Cervical Metastases From Thyroid Carcinoma
- ClinicalTrials.gov ID
- NCT04522570
- Acronym / sponsor ID
- 1255/18
- Conditions
- Thyroid Neoplasia, Well-Differentiated Thyroid Cancer, Medullary Thyroid Cancer, Lymph Node Metastases
- Keywords
- differentiated thyroid cancer, medullary thyroid cancer, cervical lymph nodes, contrast-enhanced ultrasound, thermal ablation, laser ablation, radiofrequency ablation, cryoablation
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 84 participants (actual)
- Lead sponsor
- Instituto do Cancer do Estado de São PauloUniversity, hospital or other
- Study start
- 22 Dec 2020 (actual)
- Primary completion
- 22 Dec 2025 (actual)
- Study completion
- 22 Dec 2025 (actual)
- First posted
- 21 Aug 2020 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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:
- To evaluate safety and efficacy of ultrasound-guided thermal ablation in the treatment of cervical lymph node metastases from differentiated thyroid carcinoma
- To evaluate the best response to thermal ablation defined as lymph node reduction or volume stability after ablation
- To evaluate the CEUS patterns of lymph nodes before and after ablation
- To evaluate the elastography patterns of lymph nodes before and after ablation
- To evaluate the tumor marker response after ablation
- To evaluate the contribution of thermal ablation to decrease additional therapeutic procedures
- 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.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| laser ablation | Active comparator | Device: Laser ablationPercutaneous Laser Ablation for the treatment of metastatic cervical lymph nodes with > 0.8 cm diameter with biopsy-proven diagnosis of differentiated thyroid carcinoma or medullary thyroid carcinoma. |
| cryoablation | Active comparator | Device: CryoablationPercutaneous cryoablation for the treatment of metastatic cervical lymph nodes with > 0.8 cm diameter with biopsy-proven diagnosis of differentiated thyroid carcinoma or medullary thyroid carcinoma. |
| Radiofrequency ablation | Active comparator | Device: Radiofrequency ablationPercutaneous radio frequency ablation for the treatment of metastatic cervical lymph nodes with > 0.8 cm diameter with biopsy-proven diagnosis of differentiated thyroid carcinoma or medullary thyroid carcinoma. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- 18 years of age or older
- Patients with fine needle aspiration biopsy (FNAb)-proven metastatic cervical lymph nodes at levels I, II, III, IV, V, VI or VII from differentiated thyroid carcinoma or medullary thyroid carcinoma who underwent total thyroidectomy and subsequent radioiodine therapy, in case of differentiated thyroid carcinoma.
- Patients considered high surgical risk candidate or patients who are informed about the ablation therapy and prefers it instead surgery;
- Patients with metastatic cervical lymph nodes over 0.8 cm diameter and under 4.0 cm diameter; no more than 6 simultaneous cervical nodal metastases;
- Cervical recurrences in previously lateral neck dissection patients for differentiated thyroid carcinoma or medullary thyroid carcinoma over 0.8 cm diameter.
Key exclusion criteria (9 listed)
- Age under 18 years
- Uncorrectable coagulopathy;
- Inconclusive or benign cytologic specimens;
- Pregnancy or breast-feeding;
- Anaplastic or poor-differentiated thyroid carcinoma;
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Laser ablationAlso: LASingle 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 | laser ablation |
| CryoablationAlso: CryoSingle 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 | cryoablation |
| Radiofrequency ablationAlso: RFASingle 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; | Device | Radiofrequency ablation |
Primary outcome
Evaluation of technical feasibility
Time frame: immediately after the procedure
defined as the ability to target the nodule and to perform ablation as preoperatively planned
Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability] of thermal ablation of thyroid carcinoma cervical lymph node metastases
Time frame: up to 4 weeks post-ablation
Evaluation of minor and major complication rates, immediately after ablation; and one- and four-weeks post-ablation by telephone call. Minor and major complication rates [Designed as a safety issue: Yes]. The safety endpoint for this study is to assess the incidence and severity of procedure or device-related adverse events, as reported by the Common Terminology Criteria of Adverse Events - CTCAE V5. 2017 Version.
7 secondary outcomes
Evaluation of technical success
Time frame: immediately after the procedure
Evaluation of contrast-enhanced ultrasound pattern after thermal ablation therapy
Time frame: 12 months
Evaluation of elastography pattern after thermal ablation therapy
Time frame: 24 months
Best response to the thermal ablation therapy
Time frame: 24 months
Evaluation of tumor marker response
Time frame: 24 months
Evaluation of additional therapies
Time frame: 24 months
Outcomes among thermal ablation therapies
Time frame: 24 months
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Sep 2026.
- Background: PubMed 28807450Hong YR, Luo ZY, Mo GQ, Wang P, Ye Q, Huang PT. Role of Contrast-Enhanced Ultrasound in the Pre-operative Diagnosis of Cervical Lymph Node Metastasis in Patients with Papillary Thyroid Carcinoma. Ultrasound Med Biol. 2017 Nov;43(11):2567-2575. doi: 10.1016/j.ultrasmedbio.2017.07.010. Epub 2017 Aug 12.
- Background: PubMed 27845860Guenette JP, Tuncali K, Himes N, Shyn PB, Lee TC. Percutaneous Image-Guided Cryoablation of Head and Neck Tumors for Local Control, Preservation of Functional Status, and Pain Relief. AJR Am J Roentgenol. 2017 Feb;208(2):453-458. doi: 10.2214/AJR.16.16446. Epub 2016 Nov 15.
- Background: PubMed 28342000Guang Y, Luo Y, Zhang Y, Zhang M, Li N, Zhang Y, Tang J. Efficacy and safety of percutaneous ultrasound guided radiofrequency ablation for treating cervical metastatic lymph nodes from papillary thyroid carcinoma. J Cancer Res Clin Oncol. 2017 Aug;143(8):1555-1562. doi: 10.1007/s00432-017-2386-6. Epub 2017 Mar 24.
- Background: PubMed 25450273Wang L, Ge M, Xu D, Chen L, Qian C, Shi K, Liu J, Chen Y. Ultrasonography-guided percutaneous radiofrequency ablation for cervical lymph node metastasis from thyroid carcinoma. J Cancer Res Ther. 2014 Nov;10 Suppl:C144-9. doi: 10.4103/0973-1482.145844.
- Background: PubMed 26911732Mauri G, Cova L, Ierace T, Baroli A, Di Mauro E, Pacella CM, Goldberg SN, Solbiati L. Treatment of Metastatic Lymph Nodes in the Neck from Papillary Thyroid Carcinoma with Percutaneous Laser Ablation. Cardiovasc Intervent Radiol. 2016 Jul;39(7):1023-30. doi: 10.1007/s00270-016-1313-6. Epub 2016 Feb 24.
- Background: PubMed 23150695Papini E, Bizzarri G, Bianchini A, Valle D, Misischi I, Guglielmi R, Salvatori M, Solbiati L, Crescenzi A, Pacella CM, Gharib H. Percutaneous ultrasound-guided laser ablation is effective for treating selected nodal metastases in papillary thyroid cancer. J Clin Endocrinol Metab. 2013 Jan;98(1):E92-7. doi: 10.1210/jc.2012-2991. Epub 2012 Nov 12.
- Background: PubMed 17267329Baudin E, Schlumberger M. New therapeutic approaches for metastatic thyroid carcinoma. Lancet Oncol. 2007 Feb;8(2):148-56. doi: 10.1016/S1470-2045(07)70034-7.
- Background: PubMed 12679417Monaco F. Classification of thyroid diseases: suggestions for a revision. J Clin Endocrinol Metab. 2003 Apr;88(4):1428-32. doi: 10.1210/jc.2002-021260. No abstract available.
- Background: PubMed 15496625Hegedus L. Clinical practice. The thyroid nodule. N Engl J Med. 2004 Oct 21;351(17):1764-71. doi: 10.1056/NEJMcp031436. No abstract available.
- Individual participant dataSharing planned: Yes. De-identified individual participant data for all primary and secondary outcomes measures will be made available.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Ricardo MC Freitas, PhD principal investigator
Instituto do Cancer do Estado de São Paulo
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Laser ablation, Cryoablation and Radiofrequency ablation in people with Thyroid Neoplasia and Well-Differentiated Thyroid Cancer, run by Instituto do Cancer do Estado de São Paulo at 1 site in Brazil.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 22 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Brazil. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Evaluation of technical feasibility (time frame: immediately after the procedure). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT04522570, which also lists 9 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 Sep 2026; AzTrials last refreshed its copy on 7 Nov 2026.