The American Thyroid Association (ATA) provides evidence-based, rolling clinical guidelines for managing thyroid conditions, including the updated 2021 Anaplastic Thyroid Cancer (ATC) guidelines and the 2025 Differentiated Thyroid Cancer (DTC) update. These comprehensive documents, along with management tools for pregnancy and medullary carcinoma, are available for reference on the official ATA website. Access the official documents at ATA Professional Guidelines . ATA Guidelines & Statements - American Thyroid Association