Overview of Diagnostic Terminology and Reporting -- Nondiagnostic/Unsatisfactory -- Benign -- Atypia of Undetermined Significance -- Follicular Neoplasm -- Follicular Neoplasm, Hürthle Cell Type -- Suspicious for Malignancy -- Papillary Thyroid Carcinoma and Variants -- Medullary Thyroid Carcinoma -- Poorly Differentiated Thyroid Carcinoma -- Undifferentiated (Anaplastic) Carcinoma and Squamous Cell Carcinoma of the Thyroid -- Metastatic Tumors, Lymphomas, and Miscellaneous Lesions -- Clinical Perspectives and Imaging Studies -- Molecular and Other Ancillary Tests.