Patient: Description of condition (onset, main symptoms, hospital visited, etc.): Two years ago, calcified thyroid nodules were detected in a teacher’s health checkup, and regular color B examinations were performed every 3-6 months. 2011.6.23 Ultrasound description: Bilateral thyroid glands are normal in size, smooth envelope, parenchymal echogenicity is not homogeneous. 6*3MM hypoechoic nodules are seen in the left thyroid gland, several strong light spots are seen inside with clear borders. CDFI showed no abnormal blood flow signal in the nodule. The nodule was detected in the bilateral neck and submandibular area with flat lymph node echo. 2011.6.23 Ultrasound impression: thyroid nodule with calcification foci, regular color B examination, whether to operate? Wang Ping, Department of General Surgery, The Second Hospital of Zhejiang University School of Medicine: All ultrasound results should be compared to see if our hospital has done it? Patient: Thank you for your reply in your busy schedule. What if it is benign? How to deal with malignant? Wang Ping, Department of General Surgery, The Second Affiliated Hospital of Zhejiang University School of Medicine: FNAC has some false positives and false negatives. If it is malignant, it should be operated; if it is benign, you can observe it clinically without symptoms.