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Kassia B. Reuters Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil

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Maria C.O.C. Mamone Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil

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Elsa S. Ikejiri Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil

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Cleber P. Camacho Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil

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Claudia C.D. Nakabashi Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil

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Carolina C.P.S. Janovsky Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil

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Ji H. Yang Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil

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Danielle M. Andreoni Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil

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Rosalia Padovani Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
Santa Casa de São Paulo, São Paulo, Brazil

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Rui M.B. Maciel Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
Fleury Medicina e Saúde, São Paulo, Brazil

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Felipe A.B. Vanderlei Head and Neck Division, Department of Otorhinolaryngology and Head and Neck Surgery, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil

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Rosa P.M. Biscolla Thyroid Diseases Center and Laboratory of Molecular and Translational Endocrinology, Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
Fleury Medicina e Saúde, São Paulo, Brazil

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used to distinguish between benign and malignant lesions [ 3 , 4 ]. In general, a cytological analysis with fine-needle aspiration (FNA) under US guidance is recommended for nodules with intermediate or highly suspicious sonographic patterns and with

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Roberto Negro Division of Endocrinology, “V. Fazzi” Hospital, Lecce

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Roberto Attanasio Endocrinology Service, Galeazzi Institute IRCCS, Milan

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Franco Grimaldi Endocrinology and Metabolic Disease Unit, Azienda Ospedaliero-Universitaria “S. Maria della Misericordia,” Udine

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Andrea Frasoldati Division of Endocrinology, IRCCS Arcispedale Santa Maria Nuova, Reggio Emilia

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Rinaldo Guglielmi Department of Endocrinology, Regina Apostolorum Hospital, Albano Laziale, Italy

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Enrico Papini Department of Endocrinology, Regina Apostolorum Hospital, Albano Laziale, Italy

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techniques reveals an epidemic of nonpalpable thyroid nodules that necessitate a complete workup, including US, testing for thyroid-stimulating hormone, and fine-needle aspiration (FNA) [ 3 ]. The first objective in thyroid nodule evaluation is to exclude

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Mafalda Marcelino Department of Endocrinology, Armed Forces University Hospital, Lisbon, Portugal
Department of Endocrinology, Portuguese Institute of Oncology, Lisbon, Portugal

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Pedro Marques Department of Endocrinology, Portuguese Institute of Oncology, Lisbon, Portugal

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Luis Lopes Department of Endocrinology, Armed Forces University Hospital, Lisbon, Portugal

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Valeriano Leite Department of Endocrinology, Portuguese Institute of Oncology, Lisbon, Portugal

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João Jácome de Castro Department of Endocrinology, Armed Forces University Hospital, Lisbon, Portugal

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, and fine-needle aspiration biopsy (FNAB) represent the standard for the management of thyroid nodules. Exceptions to this rule are hot (hyperfunctioning) nodules, which rarely represent clinically significant malignant lesions and therefore do not

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Haggi Mazeh Department of Surgery, Jerusalem, Israel

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Amir Orlev Department of Surgery, Jerusalem, Israel

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Ido Mizrahi Department of Surgery, Jerusalem, Israel

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David J. Gross Endocrinology and Metabolism Service Hadassah-Hebrew University Medical Center, Jerusalem, Israel

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Herbert R. Freund Department of Surgery, Jerusalem, Israel

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× 28 mm. Fine-needle aspiration of this nodule revealed a follicular lesion (Bethesda classification IV). A 131 I thyroid scan showed normal thyroid size without any hot or cold nodules. The patient elected to undergo a total thyroidectomy which was

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Gilles Russ Thyroid and Endocrine Tumor Unit, Department of Nuclear Medicine, Pitié Salpêtrière Hospital, University Pierre et Marie Curie, Paris, France

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Sophie Leboulleux Department of Nuclear Medicine and Endocrine Oncology, Institut Gustave Roussy, University Paris-Sud, Villejuif, France

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Laurence Leenhardt Thyroid and Endocrine Tumor Unit, Department of Nuclear Medicine, Pitié Salpêtrière Hospital, University Pierre et Marie Curie, Paris, France

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Laszlo Hegedüs Department of Endocrinology and Metabolism, Odense University Hospital, Odense, Denmark

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system) classification. The second part deals with the indications for US fine-needle aspiration biopsy (FNA), addresses specifically the problem of subcentimetric incidentalomas and microcarcinomas, and finally discusses the potential of nonsurgical

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Maria Mavromati Department of Endocrinology, Diabetology, Nutrition and Therapeutic Education, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva University, Geneva, Switzerland

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Essia Saiji Department of Pathology, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva, Switzerland

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Marco Stefano Demarchi Department of Endocrine Surgery, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva, Switzerland

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Vincent Lenoir Department of Radiology, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva, Switzerland

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Amanda Seipel Department of Pathology, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva, Switzerland

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Paulina Kuczma Department of Endocrine Surgery, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva, Switzerland

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François R Jornayvaz Department of Endocrinology, Diabetology, Nutrition and Therapeutic Education, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva University, Geneva, Switzerland

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Minerva Becker Department of Radiology, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva, Switzerland

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Eugenio Fernandez Department of Oncology, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva, Switzerland

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Claudio De Vito Department of Pathology, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva, Switzerland

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Frédéric Triponez Department of Endocrine Surgery, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva, Switzerland

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Sophie Leboulleux Department of Endocrinology, Diabetology, Nutrition and Therapeutic Education, Geneva University Hospitals, Rue Gabrielle Perret Gentil, Geneva University, Geneva, Switzerland

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with surgery, active surveillance, or local treatment, depending on the size of the nodule ( 3 , 4 , 5 , 6 ). Given the high rate of thyroid nodules, most of which are benign, to reduce fine needle aspiration cytology (FNAC) and unnecessary surgery

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Gilles Russ Thyroid and Endocrine Tumors, Institute of Endocrinology, Pitié Salpêtrière Hospital, Pierre and Marie Curie University, Paris, France

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Steen J. Bonnema Department of Endocrinology, Odense University Hospital, Odense, Denmark

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Murat Faik Erdogan Department of Endocrinology and Metabolism, University of Ankara School of Medicine, İbni Sina Hastanesi, Ankara, Turkey

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Cosimo Durante Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy

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Rose Ngu Head Neck and Thyroid Imaging, Department of Radiology, Guy’s and St Thomas’ Hospitals NHS Foundation Trust, London, United Kingdom

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Laurence Leenhardt Thyroid and Endocrine Tumors, Institute of Endocrinology, Pitié Salpêtrière Hospital, Pierre and Marie Curie University, Paris, France

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]. The goal of an initial sonographic assessment of thyroid nodules is to distinguish benign nodules that can be managed conservatively from those with suspicious or malignant features requiring further management. Fine needle aspiration (FNA) plays a

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Ana Isabel Álvarez-Mancha Department of Medicine, University of Malaga, Malaga, Spain
Department of Pathology, General University Hospital of Ciudad Real, Ciudad Real, Spain

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Isabel Mancha-Doblas Department of Medicine, University of Malaga, Malaga, Spain
Department of Endocrinology and Nutrition, Virgen de la Victoria University Hospital, Málaga, Spain

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María Molina-Vega Department of Endocrinology and Nutrition, Virgen de la Victoria University Hospital, Málaga, Spain
The Biomedical Research Institute of Malaga and Platform in Nanomedicine (IBIMA-BIONAND Platform), University of Malaga, Malaga, Spain

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Diego Fernández-García Department of Endocrinology and Nutrition, Virgen de la Victoria University Hospital, Málaga, Spain

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Ana María Gómez-Pérez Department of Endocrinology and Nutrition, Virgen de la Victoria University Hospital, Málaga, Spain
The Biomedical Research Institute of Malaga and Platform in Nanomedicine (IBIMA-BIONAND Platform), University of Malaga, Malaga, Spain

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Elena Gallego-Domínguez Department of Medicine, University of Malaga, Malaga, Spain
Department of Pathology, Virgen de la Victoria University Hospital, Málaga, Spain

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María Victoria Ortega-Jiménez Department of Medicine, University of Malaga, Malaga, Spain
Department of Pathology, Virgen de la Victoria University Hospital, Málaga, Spain

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Isabel Hierro-Martín Department of Pathology, Virgen de la Victoria University Hospital, Málaga, Spain

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Francisco J Tinahones Department of Medicine, University of Malaga, Malaga, Spain
Department of Endocrinology and Nutrition, Virgen de la Victoria University Hospital, Málaga, Spain
The Biomedical Research Institute of Malaga and Platform in Nanomedicine (IBIMA-BIONAND Platform), University of Malaga, Malaga, Spain

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Introduction Clinical management of the thyroid nodules is based on a combination of clinical risk factors, functional status, ultrasound patterns, and cytologic findings when fine needle aspiration (FNA) is indicated ( 1 , 2 , 3 , 4 , 5

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M Grussendorf Department of Internal Medicine, University Hospital, Düsseldorf, Germany

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I Ruschenburg MVZ Wagnerstibbe Center for Cytology and Pathology, Einbeck, Germany

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G Brabant Department of Diabetes, Endocrinology and Gastroenterology, School of Medical Sciences, University of Manchester, Manchester, UK

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ultrasound (US) criteria and possibly fine-needle aspiration cytology (FNAC), malignancy rates may be overestimated and will not necessarily reflect the chances of a nodule being first diagnosed by palpation or imaging methods. On the other hand, ROM may as

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Stamatina Ioakim CEDM, Centre of Endocrinology, Diabetes & Metabolism, Limassol, Cyprus
Medical School, University of Milan, Milan, Italy

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Akheel A Syed Department of Diabetes, Endocrinology & Obesity Medicine, Salford Royal NHS Foundation & University Teaching Trust, Salford, UK
Division of Diabetes, Endocrinology & Gastroenterology, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK

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George Zavros CEDM, Centre of Endocrinology, Diabetes & Metabolism, Limassol, Cyprus

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Michalis Picolos Alithias Endocrinology Centre, Nicosia, Cyprus

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Luca Persani Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
Department of Endocrinology and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, Milan, Italy

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Angelos Kyriacou CEDM, Centre of Endocrinology, Diabetes & Metabolism, Limassol, Cyprus
Department of Diabetes, Endocrinology & Obesity Medicine, Salford Royal NHS Foundation & University Teaching Trust, Salford, UK
Medical School, European University of Cyprus, Nicosia, Cyprus

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recurrence ( 5 ). As such, physicians managing thyroid nodules need to identify the patients with ‘clinically significant’ carcinomas without subjecting too many people to invasive procedures i.e. fine-needle aspiration (FNA) biopsies and thyroidectomies

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