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Ablación térmica de metástasis cervicales de carcinoma de tiroides

21 de septiembre de 2026 actualizado por: Instituto do Cancer do Estado de São Paulo

Ablación térmica percutánea guiada por ultrasonido de metástasis cervicales de carcinoma de tiroides

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.

Descripción general del estudio

Estado

Terminado

Condiciones

Intervención / Tratamiento

Descripción detallada

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.

Tipo de estudio

Intervencionista

Inscripción (Actual)

84

Fase

  • No aplica

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

    • São Paulo
      • São Paulo, São Paulo, Brasil, 01246000
        • Instituto do Cancer do Estado de São Paulo

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años y mayores (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  • 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.

Exclusion Criteria:

  • Age under 18 years
  • Uncorrectable coagulopathy;
  • Inconclusive or benign cytologic specimens;
  • Pregnancy or breast-feeding;
  • Anaplastic or poor-differentiated thyroid carcinoma;
  • Partial thyroidectomy
  • 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

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Tratamiento
  • Asignación: Aleatorizado
  • Modelo Intervencionista: Asignación paralela
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Comparador activo: laser ablation

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.

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;

Otros nombres:
  • LA
Comparador activo: cryoablation

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.

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;

Otros nombres:
  • Crio
Comparador activo: Radiofrequency ablation

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.

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;

Otros nombres:
  • RFA

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Evaluation of technical feasibility
Periodo de tiempo: immediately after the procedure

defined as the ability to target the nodule and to perform ablation as preoperatively planned

immediately after the procedure
Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability] of thermal ablation of thyroid carcinoma cervical lymph node metastases
Periodo de tiempo: 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.

up to 4 weeks post-ablation

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Evaluation of technical success
Periodo de tiempo: immediately after the procedure

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

immediately after the procedure
Evaluation of contrast-enhanced ultrasound pattern after thermal ablation therapy
Periodo de tiempo: 12 months

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

12 months
Evaluation of elastography pattern after thermal ablation therapy
Periodo de tiempo: 24 months

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.

24 months
Best response to the thermal ablation therapy
Periodo de tiempo: 24 months

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.

24 months
Evaluation of tumor marker response
Periodo de tiempo: 24 months

Number of patients with tumor marker response: defined in negative thyroglobulin, calcitonin, or carcinoembryonic antigen (CEA) levels or anti-thyroglobulin antibodies

24 months
Evaluation of additional therapies
Periodo de tiempo: 24 months

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.

24 months
Outcomes among thermal ablation therapies
Periodo de tiempo: 24 months

Number of patients with complications, side effects and tolerability in each ablation technique.

24 months

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Investigadores

  • Investigador principal: Ricardo MC Freitas, PhD, Instituto do Cancer do Estado de São Paulo

Publicaciones y enlaces útiles

La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.

Publicaciones Generales

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

22 de diciembre de 2020

Finalización primaria (Actual)

22 de diciembre de 2025

Finalización del estudio (Actual)

22 de diciembre de 2025

Fechas de registro del estudio

Enviado por primera vez

10 de agosto de 2020

Primero enviado que cumplió con los criterios de control de calidad

19 de agosto de 2020

Publicado por primera vez (Actual)

21 de agosto de 2020

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

22 de septiembre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

21 de septiembre de 2026

Última verificación

1 de septiembre de 2026

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • 1255/18

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

SÍ

Descripción del plan IPD

De-identified individual participant data for all primary and secondary outcomes measures will be made available.

Marco de tiempo para compartir IPD

Data will become available within 18 months of study completion and for 6 months.

Criterios de acceso compartido de IPD

Data access requests will be reviewed by an external Independent Review Panel. Requestors will be required to sign a Data Access Agreement.

Tipo de información de apoyo para compartir IPD

  • PROTOCOLO DE ESTUDIO
  • SAVIA
  • CIF
  • CÓDIGO_ANALÍTICO
  • RSC

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

Sí

producto fabricado y exportado desde los EE. UU.

Sí

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .