Fig. 2From: The age threshold of the 8th edition AJCC classification is useful for indicating patients with aggressive papillary thyroid cancer in clinical practiceKaplan-Meier curves comparing probability of disease-free survival of PTC patients with a: <â45âyears old group and > 45âyears old group; b: <â55âyears old group and > 55âyears old groupBack to article page