RET and thyroid nodule: With the development of various methodologies, such as contrast-enhanced ultrasonography (CEUS), ultrasonic-guided fine-needle biopsy, ultrasonic elastography (USE), tomography (CT), diffusion weighted imaging (DWI), and genetic mutations techniques (BRAF, RAS, RET/PTC, PAX8/PPARγ, etc.), preoperative evaluation of thyroid nodules with radionuclides has rarely been used.