In recent years, as the incidence of differentiated thyroid cancer (including papillary thyroid cancer or follicular carcinoma, of which about 90% are papillary carcinoma) continues to rise rapidly, the pressure on our clinical admissions is also increasing. In order to provide patients with high quality and efficient medical services, patients and their families are advised to know the following five important pre-clinical instructions and make appropriate preparations: 1. Most patients with differentiated thyroid cancer require timely postoperative iodine-131 therapy to achieve the goals of destroying residual or metastatic lesions after surgery, reducing the risk of recurrence, and assessing the disease in real time. After about 70 years of clinical research and extensive practice, iodine-131 therapy has gradually matured and become an important part of the classic treatment model for differentiated thyroid cancer (surgery + iodine-131 + thyroxine). 2. Since it takes some time for wound healing and local tissue edema to be relieved due to surgical trauma, it is more difficult to interpret ultrasound and other related examinations in a short period of time. Therefore, it is recommended that postoperative patients should first take thyroxine preparations (e.g. Eugenol, Retis, thyroid tablets, etc.) under the guidance of the surgeon, and read more: How much thyroxine should postoperative thyroid cancer patients take? 3. Since the clinic also sees patients with other diseases (e.g. hyperthyroidism, thyroid nodules, bone metastases, etc.), it is necessary to triage patients appropriately according to the type and characteristics of the disease to improve efficiency. It is strongly recommended that post-operative thyroid cancer patients should choose the nuclear medicine specialist clinic for their first consultation. 4. Regarding the consultation, please prepare the discharge summary, pathology report, various examination images and reports, outpatient medical record book and other related materials when waiting for consultation in order to improve the efficiency as much as possible. The main tasks of the outpatient clinic include: A. review the patient’s previous treatment experience to form a preliminary diagnosis; B. prescribe the necessary tests (such as blood tests, neck ultrasound, etc.), assess the condition in real time, clarify the indications for admission and exclude contraindications to treatment; C. inform the patient of the preliminary treatment plan and related precautions; D. retain the main information such as the surgical discharge summary (a copy is also available), contact phone number, and complete the inpatient bed Reservation; etc. 5.Thyroid cancer has common biological characteristics of malignant tumors such as local infiltration and distant metastasis, and should be treated as early as possible. In order to carry out the hospital’s mission of “serving patients wholeheartedly” and to fully guarantee the interests of patients, we fully understand and respect their choice of other medical institutions with relevant medical qualifications for timely treatment while making full and reasonable use of existing medical resources.