摘要
To the Editor: Thyroid cancer, which is one of the most common diseases of the endocrine system, can be divided into four primary types, including papillary thyroid cancer (PTC) accounting for 80% to 90% of cases, follicular thyroid cancer accounting for 10% to 15% of cases, medullary thyroid cancer (MTC) accounting for 3% to 10% of cases, and anaplastic thyroid cancer accounting for 1% to 2% of cases. Typically, patients diagnosed with PTC or follicular thyroid cancer have better prognoses and overall survival rates than patients diagnosed with MTC or anaplastic thyroid cancer. The incidence of thyroid cancer has been rapidly growing in the world [Supplementary Figure S1, http://links.lww.com/CM9/A99].[1] During the last 20 years, China has experienced significant growth in the number of annual thyroid cancer diagnoses. According to the Dataset Records for National Central Cancer Registry of China, thyroid cancer incidences have steadily increased in China from 2010 to 2014, yet the mortality rate has remained stable during the same period [Supplementary Tables S1 and S2, http://links.lww.com/CM9/A99].
