Dr. Sophie Leboulleux, MD, Ph.D., specialized in nuclear medicine, endocrinology, and oncology and served as head of the Nuclear Medicine Department at Gustave Roussy until 2021. She is a principal investigator and co-investigator in multiple clinical trials, focusing on localized and metastatic thyroid cancers, as well as malignant endocrine and adrenal tumors. In 2008, she launched the "Thyroid Nodule in One-Day Reception" program at Gustave Roussy, streamlining cancer diagnosis and now serving over 750 patients annually. Dr. Leboulleux has authored or co-authored nearly 200 peer-reviewed scientific publications.