T.N.T. Association

About us

The TNT Association was formed to promote ultrasound-guided ablative therapy of thyroid nodules using Radiofrequency (RFA)

Scientific Committee


Catherine Sinclair

Melbourne, (VIC) Australia

Associate Professor Catherine Sinclair is a dual fellowship trained neck endocrine surgeon and laryngologist. She completed her Otolaryngology Head and Neck Surgery training in Melbourne, Australia, before travelling to the United States to pursue fellowships in head and neck surgery and laryngology.

Between 2010 and 2021 she worked in New York where she served as the Director of Division of Head and Neck Surgery, Mount Sinai West Hospital. She relocated to Australia at the start of 2021.
A/Prof. Sinclair is an internationally recognized expert in surgical and non-surgical management of neck endocrine diseases. She has been an early adopter of radiofrequency ablation for treatment of benign thyroid nodules and performed the first radiofrequency ablation for a benign thyroid nodule in New York in August 2019. In April 2021, she performed the first radiofrequency ablation in Australia. She co-chaired the American Thyroid Association on Ablation, released in September 2023, and has authored a number of articles and book chapters on topics related to thyroid ablation. She has also developed and implemented a novel methodology for intraoperative continuous neuromonitoring of the recurrent laryngeal and vagus nerves which is starting to be utilized worldwide in both neck endocrine and neurosurgical procedures.
Dr Sinclair is the current Editor-in-Chief of VideoEndocrinology, one of the three official journals of the American Thyroid Association.


Juan Pablo Dueñas

Medellin, Colombia

Endocrine Surgeon Fellow of the European Board of Surgeons, Division of Endocrine Surgery since 2014. 13 years of exclusive practice in the treatment of benign or malignant diseases of the endocrine system amenable to surgical management.

I currently practice at the Instituto de Cancerologia IDC Las Americas – AUNA and in my private practice in Medellin, Colombia. Member of the Surgical Affairs Committee of the Latin American Thyroid Society (LATS). President of the Chapter of Endocrine Surgery, Metabolism and Nutrition of the Colombian Association of Surgery (ACC). Associate Professor of Surgery (Universidad CES)

Camilo Gonzales-Velazquez

Monterrey, Mexico

Dr. Camilo Daniel Gonzalez Velázquez is an internist and endocrinologist who graduated from the Universidad Autónoma de Nuevo León.

Currently, he holds the position of a full-time professor and director of the Thyroid Diseases Clinic in the Endocrinology Department at “Dr. José E. González” University Hospital, affiliated with the Universidad Autónoma de Nuevo León. Additionally, he is pursuing a Ph.D., focusing his research primarily on malignant thyroid diseases. Recently, he achieved the level of a researcher I within the Mexican National Research System (CONACYT).
Furthermore, Dr. Gonzalez Velázquez actively participates as a member of the American Thyroid Association’s Committee on Trainees and Early Career Physicians. He has also been honored with the Gerald Gutiérrez Memorial Scholarship, granted by the THANC Foundation in collaboration with Mount Sinai Hospital, located in New York City. In partnership with the Thyroid, Head, and Neck (THANC) Foundation, Camilo has played a key role in developing the TIRO (Thyroid International Recommendations Online) platform. The platform aims to offer updated and accessible information to primary care physicians and thyroid specialists, thereby enhancing the quality of patient care.

Gilles Russ

Paris, France

Roberto Valcavi

Reggio Emilia, Italy

Roberto Valcavi MD, FACE is specialist in Endocrinology and in Internal Medicine.
Dr. Roberto Valcavi has started to perform thyroid Fine Needle Aspiration Cytology (FNAC) in 1977 when he was medical student, he initiated to work with thyroid ultrasound in 1983, and first did thyroid ablative therapies with ethanol in 1992.

He is the former Director of the Endocrinology Department at (IRCCS – ASMN) in Reggio Emilia, Italy.
In 1999 he founded the AME (Italian Association of Endocrinologists) and is AME Past President. In 2004 in Boston Dr. Roberto Valcavi received the “International Clinician Award” in recognition of the advances achieved in favor of clinical endocrinology and for the benefit of all endocrine patients.
Currently Roberto Valcavi is Director of the ETC. (Endocrine Thyroid Clinic) in Reggio Emilia dedicated to the diagnosis and therapy of endocrine neck (thyroid, parathyroid, lymph nodes) benign and malignant lesions.
He is expert in thyroidology, thyroid ultrasonology, and ultrasound-guided minimally invasive surgery of thyroid nodules by ethanol (EA) radio frequency (RFA), Laser LA), and Microwave (MWA) ablation.
Dr. Roberto Valcavi is President-in-Office of the TNT Association (International Association for Thyroid Nodules Therapies). He published 91 Pubmed indexed papers and numerous chapters in books. He was organizer, speaker and chairman in a great number of Courses, Workshops, Meetings, and Congresses.

JuErivelto Volpi

São Paulo, Brazil

Erivelto Volpi, MD, Ph., is a Head and Neck Surgeon and a fellow of the Brazilian College of Surgeons and Brazilian Society of Head and Neck Surgery. He is also a member of several professional societies, including the American Head and Neck Society, Brazilian Head and Neck Society, Latin American Thyroid Society, American Thyroid Association, and International Society of Endocrine Surgery.

Dr. Volpi graduated from Faculdade de Ciências Médicas de Santos in 1986 and completed his General Surgery and Head and Neck Surgery residency program at Hospital das Clinicas of Sao Paulo University from 1987 to 1991.
In 2011, he defended his doctoral dissertation on Intraoperative Neural Monitoring in Thyroid Surgery at the University of Sao Paulo Medical School. After finishing his residency, he served as an attending surgeon, focusing on training residents and research until 2017, when he retired. Since then, he has been working at Oswaldo Cruz German Hospital – Oncology Center, one of Brazil’s top five private hospitals. Additionally, he is a Professor in charge of the Graduate Course of Thyroid and Parathyroid at CETRUS Medical Center in Sao Paulo.
Dr. Volpi served eight years on the Board of the Latin American Thyroid Society and was a co-founder of the Brazilian Society of Endocrine Surgery. His primary research areas include thyroid cancer, parathyroid surgery, and minimally invasive procedures. Dr. Volpi was one of the first to introduce Radiofrequency Ablation to treat thyroid nodules in Brazil and trained many physicians from Brazil and abroad in this technology.
He has published three textbooks on thyroid cancer and thyroid and parathyroid surgery in Brazil, wrote eleven textbook chapters related to thyroid diseases in Portuguese, Spanish, and English, and published 28 indexed papers. He is a peer reviewer of many indexed journals like the Brazilian Journal of Otorhinolaryngology and Langenbeck’s Archives of Surgery. Dr. Volpi is also an Associate Editor of Clinical Thyroidology and an Invited Editor of Frontiers in Endocrinology. He is a member of the Endocrine Surgery Board of the American Head and Neck Society and a member of the Research Committee of the American Thyroid Association.

Shuhang Xu

Nanjing, China

Nanjing University of Chinese Medicine, China
Professor Shuhang Xu is a chief doctor in the Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Traditional Chinese Medicine, Nanjing, China.

He is also the director of Chinese Medical Doctor Association Tumor Ablation Therapy Technology Training Base. Professor Xu’s research interests centre around thyroid dysfunction, thyroid diseases in the elderly, diagnosis and thermal ablation of nodular thyroid disease. He is the member of American Thyroid Association and Asia & Oceania Thyroid Association, Young committee member of Chinese Society of Endocrinology, Standing committee member of China Society of Clinical Oncology.

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