Fig. 1

Overall survival of patients with papillary, follicular, medullary, or anaplastic thyroid carcinoma. Breslow test: p < 0.001. “Censored”: in the Kaplan-Meier curves the small vertical ticks mark individual patients whose survival times have been “right censored”. These patients did not experience the event of interest (cancer-related death) for the duration of the study and were still alive at the end of the observation period