Risk factors and outcomes of metastatic poorly differentiated thyroid carcinoma

Figure 1 Flowchart of cohort establishment.

Figure 2 Kaplan–Meier curves of cancer-specific survival in poorly differentiated thyroid carcinoma patients. A: Kaplan–Meier survival curves for patients with (N1) and without (N0) lymph node metastasis; B: Kaplan–Meier survival curves for patients with distant metastasis at presentation (M1), distant metastasis developing during follow-up (M2), and no metastasis (M0); C: Kaplan–Meier survival curves for poorly differentiated thyroid carcinoma patients with stages I, II, III, and IV disease at diagnosis.