8th edition of AJCC/TNM staging system of thyroid cancer: what to expect (ITCO#2)
The 8th edition of AJCC/TNM staging system for differentiated thyroid cancer (DTC) has recently been published. The aim of this study was to compare AJCC/TNM staging 7th and 8th edition in terms of tumor stage distribution in a multicenter, consecutive and prospective cohort of newly diagnosed DTC collected in a web-based observational database. Additional information concerning the extent of minimal extrathyroidal extension was collected. A cohort of 1765 DTC patients (76% females, median age 48 years, 94% papillary histotype) was analyzed. Younger patients (