GETNE Registration of Thyroid Cancer

This study is building a detailed medical registry to track patients with thyroid cancer — a cancer that forms in the thyroid gland, which sits in the neck and controls important body functions like metabolism. The registry will include people diagnosed with differentiated thyroid cancer (the most common type, which tends to grow slowly), medullary thyroid cancer (a rarer type that comes from different thyroid cells), and anaplastic thyroid cancer (a rare but aggressive form). By collecting and organizing this patient data, researchers hope to better understand how these cancers behave over time and how patients respond to different treatments. **You may be eligible if...** - You are 18 years or older - You have been diagnosed with differentiated, medullary, or anaplastic thyroid cancer confirmed by a tissue biopsy - You are willing to participate and can understand and sign a consent form **You may NOT be eligible if...** - You are under 18 years old - You have a different type of thyroid cancer, or your diagnosis has not been confirmed by biopsy - Your basic medical information needed for the study is not available Talk to your doctor to see if this trial is right for you.