ABSTRACT

Thyroid imaging-radiological evaluation is based on ultrasound (US). Computed tomography and magnetic resonance imaging are rarely needed. To be able to differentiate the rare malignant nodules among the frequent benign nodules, the sonographic clues should be carefully evaluated and interpreted. The clinical and laboratory findings are usually normal in thyroid cancer patients. After detailed description of the nodules, their risk of malignancy should be given by (American Thyroid Association Guidelines) or thyroid imaging reporting and data systems(TI-RADS) terminology defined by several societies of USA, Korea, and Europe basically. These risk stratification systems, which have an increasing popularity in the last 15 years, allow everyone to talk the same language. Some nodules will be biopsied and diagnosed as thyroid cancer, based on these TI-RADS. Thyroid cancer has 4 basic types; papillary, follicular, medullary and anaplastic.